diff --git a/recipe_modules/repo_util/api.py b/recipe_modules/repo_util/api.py
index 785e272..9587a70 100644
--- a/recipe_modules/repo_util/api.py
+++ b/recipe_modules/repo_util/api.py
@@ -3,28 +3,19 @@
 # found in the LICENSE file.
 
 REPOS = {
-    'flutter':
-        'https://flutter.googlesource.com/mirrors/flutter',
-    'engine':
-        'https://flutter.googlesource.com/mirrors/engine',
-    'cocoon':
-        'https://flutter.googlesource.com/mirrors/cocoon',
-    'infra':
-      'https://flutter.googlesource.com/infra',
-    'packages':
-        'https://flutter.googlesource.com/mirrors/packages',
-    'plugins':
-        'https://flutter.googlesource.com/mirrors/plugins'
+    'flutter': 'https://flutter.googlesource.com/mirrors/flutter',
+    'engine': 'https://flutter.googlesource.com/mirrors/engine',
+    'cocoon': 'https://flutter.googlesource.com/mirrors/cocoon',
+    'infra': 'https://flutter.googlesource.com/infra',
+    'monorepo': 'https://dart.googlesource.com/monorepo',
+    'packages': 'https://flutter.googlesource.com/mirrors/packages',
+    'plugins': 'https://flutter.googlesource.com/mirrors/plugins'
 }
 
 # TODO(keyonghan): deprecate when all repos are migrated to main.
 REPO_BRANCHES = {
-  'flutter': 'master',
-  'engine': 'main',
-  'cocoon': 'main',
-  'infra': 'main',
-  'packages': 'main',
-  'plugins': 'main'
+    'flutter': 'master', 'engine': 'main', 'cocoon': 'main', 'infra': 'main',
+    'packages': 'main', 'plugins': 'main'
 }
 
 import re
@@ -81,19 +72,106 @@
             soln.managed = False
             soln.custom_vars = custom_vars
             src_cfg.parent_got_revision_mapping['parent_got_revision'
-                                              ] = 'got_revision'
-            src_cfg.repo_path_map[git_url] = ('src/flutter', git_ref or 'refs/heads/%s' % REPO_BRANCHES['engine'])
+                                               ] = 'got_revision'
+            src_cfg.repo_path_map[git_url] = (
+                'src/flutter', git_ref or
+                'refs/heads/%s' % REPO_BRANCHES['engine']
+            )
             self.m.gclient.c = src_cfg
             self.m.gclient.c.got_revision_mapping['src/flutter'
-                                                ] = 'got_engine_revision'
+                                                 ] = 'got_engine_revision'
             self.m.bot_update.ensure_checkout()
             self.m.gclient.runhooks()
           except:
             # On any exception, clean up the cache and raise
             _ClobberCache()
             raise
+
     # Some outlier GoB mirror jobs can take >250secs.
-    self.m.retry.wrap(_InnerCheckout, step_name='Checkout source', sleep=10.0, backoff_factor=5, max_attempts=4)
+    self.m.retry.wrap(
+        _InnerCheckout,
+        step_name='Checkout source',
+        sleep=10.0,
+        backoff_factor=5,
+        max_attempts=4
+    )
+
+  def monorepo_checkout(
+      self, checkout_path, env, env_prefixes, clobber=True, custom_vars={}
+  ):
+    """Checkout code using gclient.
+
+    Args:
+      checkout_path(Path): The path to checkout source code and dependencies.
+      env(dict): A dictionary with the environment variables to set.
+      env_prefixes(dict): A dictionary with the paths to be added to environment variables.
+      clobber(bool): A boolean indicating whether the checkout folder should be cleaned.
+      custom_vars(dict): A dictionary with custom variable definitions for gclient solution.
+    """
+    git_url = REPOS['monorepo']
+    git_id = self.m.buildbucket.gitiles_commit.id
+    git_ref = self.m.buildbucket.gitiles_commit.ref
+    if (self.m.buildbucket.gitiles_commit.host != 'dart.googlesource.com' or
+        self.m.buildbucket.gitiles_commit.project != 'monorepo'):
+      raise ValueError(
+          'Input reference is not on dart.googlesource.com/monorepo'
+      )
+
+    # Inner function to clobber the cache
+    def _ClobberCache():
+      # Ensure depot tools is in the path to prevent problems with vpython not
+      # being found after a failure.
+      with self.m.depot_tools.on_path():
+        self.m.file.rmtree('Clobber cache', checkout_path)
+        self.m.file.rmtree(
+            'Clobber git cache', self.m.path['cache'].join('git')
+        )
+        self.m.file.ensure_directory('Ensure checkout cache', checkout_path)
+
+    # Inner function to execute code a second time in case of failure.
+    def _InnerCheckout():
+      with self.m.step.nest('Checkout source code'):
+        if clobber:
+          _ClobberCache()
+        with self.m.context(env=env, env_prefixes=env_prefixes,
+                            cwd=checkout_path), self.m.depot_tools.on_path():
+          try:
+            src_cfg = self.m.gclient.make_config()
+            soln = src_cfg.solutions.add()
+            soln.name = 'monorepo'
+            soln.url = git_url
+            soln.revision = git_id
+            soln.managed = False
+            soln.custom_vars = custom_vars
+            #src_cfg.parent_got_revision_mapping['parent_got_revision'
+            #] = 'got_revision'
+            src_cfg.repo_path_map[git_url] = ('monorepo', git_ref)
+            self.m.gclient.c = src_cfg
+            self.m.gclient.c.got_revision_mapping['monorepo'
+                                                 ] = 'got_monorepo_revision'
+            self.m.gclient.c.got_revision_mapping['engine/src'
+                                                 ] = 'got_buildroot_revision'
+            self.m.gclient.c.got_revision_mapping['engine/src/flutter'
+                                                 ] = 'got_engine_revision'
+            self.m.gclient.c.got_revision_mapping['engine/src/third_party/dart'
+                                                 ] = 'got_dart_revision'
+            self.m.gclient.c.got_revision_mapping['flutter'
+                                                 ] = 'got_flutter_revision'
+            self.m.bot_update.ensure_checkout()
+            self.m.gclient.runhooks()
+          except:
+            # On any exception, clean up the cache and raise
+            _ClobberCache()
+            raise
+
+    # Some outlier GoB mirror jobs can take >250secs.
+    self.m.retry.wrap(
+        _InnerCheckout,
+        step_name='Checkout source',
+        sleep=10.0,
+        backoff_factor=5,
+        max_attempts=4
+    )
 
   def checkout(self, name, checkout_path, url=None, ref=None):
     """Checks out a repo and returns sha1 of checked out revision.
@@ -116,11 +194,16 @@
       # if this a release build, self.m.buildbucket.gitiles_commit.id should have more priority than
       # ref since it is more specific, and we don't want to default to refs/heads/<REPO_BRANCHES[name]>
       if ref in ['refs/heads/beta', 'refs/heads/stable']:
-        git_ref = (self.m.buildbucket.gitiles_commit.id or
-          self.m.buildbucket.gitiles_commit.ref or ref)
+        git_ref = (
+            self.m.buildbucket.gitiles_commit.id or
+            self.m.buildbucket.gitiles_commit.ref or ref
+        )
       else:
-        git_ref = (ref or self.m.buildbucket.gitiles_commit.id or
-          self.m.buildbucket.gitiles_commit.ref or 'refs/heads/%s' % REPO_BRANCHES[name])
+        git_ref = (
+            ref or self.m.buildbucket.gitiles_commit.id or
+            self.m.buildbucket.gitiles_commit.ref or
+            'refs/heads/%s' % REPO_BRANCHES[name]
+        )
 
       def do_checkout():
         return self.m.git.checkout(
@@ -131,8 +214,11 @@
             set_got_revision=True,
             tags=True
         )
+
       # Some outlier GoB mirror jobs can take >250secs.
-      return self.m.utils.retry(do_checkout, sleep=10.0, backoff_factor=5, max_attempts=4)
+      return self.m.utils.retry(
+          do_checkout, sleep=10.0, backoff_factor=5, max_attempts=4
+      )
 
   def in_release_and_main(self, checkout_path):
     """Determine if a commit was already tested on main branch.
@@ -149,8 +235,8 @@
   def get_commit(self, checkout_path):
     with self.m.context(cwd=checkout_path):
       commit = self.m.git(
-          'rev-parse', 'HEAD',
-          stdout=self.m.raw_io.output_text()).stdout.strip()
+          'rev-parse', 'HEAD', stdout=self.m.raw_io.output_text()
+      ).stdout.strip()
       return commit
 
   def current_commit_branches(self, checkout_path):
@@ -159,9 +245,14 @@
       with self.m.context(cwd=checkout_path):
         commit = self.get_commit(checkout_path)
         branches = self.m.git(
-            'branch', '-a', '--contains', commit,
-            stdout=self.m.raw_io.output_text()).stdout.splitlines()
-        return [b.strip().replace('remotes/origin/', '') for b in branches] or []
+            'branch',
+            '-a',
+            '--contains',
+            commit,
+            stdout=self.m.raw_io.output_text()
+        ).stdout.splitlines()
+        return [b.strip().replace('remotes/origin/', '') for b in branches
+               ] or []
 
   def get_branch(self, checkout_path):
     """Get git branch for beta and stable channels.
@@ -182,26 +273,28 @@
     if self.m.properties.get('git_branch', '') in ['beta', 'stable']:
       branches = self.current_commit_branches(checkout_path)
       branches = [b for b in branches if b.startswith('flutter')]
-    # The following paragraph justifies why we need to write in the logic as one - liners
-    # the way these tests work are that they will not execute the actual command, but execute a placeholder command
-    #  given its original format of if statement, the closest I can get to trigger the logic is the following:
-        #   release_checkout_path = api.path['start_dir'].join('release')
-        #   api.repo_util.checkout('flutter', release_checkout_path, ref='680962aa75a3c0ea8a55c57adc98944f5558bafd')
-        #   api.repo_util.get_branch(release_checkout_path)
-        #   api.repo_util.in_release_and_main(release_checkout_path)
-    # We would expect the sha to be passed in to list branches, so that we can get a branch name that starts with flutter,
-    # However, the git command was never performed verbosely, and instead if we study the output json file, we get
-        #   "git",
-        #   "branch",
-        #   "-a",
-        #   "--contains",
-        #   ""
-    # This manifests that what the test train is seeking is only code coverage, and it has no interest in performing
-    # the exact logic and properly setting up the variables.
-    # Now that we know tests are placeholders and only line nubmer based coverage is checked, we are left with two options:
-    # Either set some sort of api property and pass in to this function for override (which
-    # is not reasonable), or squeeze the if check into a one-liner.
-      return branches[0] if len(branches) > 0 else self.m.properties.get('git_branch', '')
+      # The following paragraph justifies why we need to write in the logic as one - liners
+      # the way these tests work are that they will not execute the actual command, but execute a placeholder command
+      #  given its original format of if statement, the closest I can get to trigger the logic is the following:
+      #   release_checkout_path = api.path['start_dir'].join('release')
+      #   api.repo_util.checkout('flutter', release_checkout_path, ref='680962aa75a3c0ea8a55c57adc98944f5558bafd')
+      #   api.repo_util.get_branch(release_checkout_path)
+      #   api.repo_util.in_release_and_main(release_checkout_path)
+      # We would expect the sha to be passed in to list branches, so that we can get a branch name that starts with flutter,
+      # However, the git command was never performed verbosely, and instead if we study the output json file, we get
+      #   "git",
+      #   "branch",
+      #   "-a",
+      #   "--contains",
+      #   ""
+      # This manifests that what the test train is seeking is only code coverage, and it has no interest in performing
+      # the exact logic and properly setting up the variables.
+      # Now that we know tests are placeholders and only line nubmer based coverage is checked, we are left with two options:
+      # Either set some sort of api property and pass in to this function for override (which
+      # is not reasonable), or squeeze the if check into a one-liner.
+      return branches[0] if len(branches) > 0 else self.m.properties.get(
+          'git_branch', ''
+      )
 
     return self.m.properties.get('git_branch', '')
 
@@ -217,7 +310,9 @@
           'flutter bin folders do not exist,'
           'did you forget to checkout flutter repo?'
       )
-      self.m.step.empty('Flutter Environment', status=self.m.step.FAILURE, step_text=msg)
+      self.m.step.empty(
+          'Flutter Environment', status=self.m.step.FAILURE, step_text=msg
+      )
     git_ref = self.m.properties.get('git_ref', '')
     pub_cache_path = self.m.path['start_dir'].join('.pub-cache')
     env = {
@@ -236,11 +331,13 @@
             re.sub('refs\/pull\/|\/head', '', git_ref),
         'LUCI_BRANCH':
             self.m.properties.get('release_ref', '').replace('refs/heads/', ''),
-        'GIT_BRANCH': self.get_branch(checkout_path),
+        'GIT_BRANCH':
+            self.get_branch(checkout_path),
         'OS':
             'linux' if self.m.platform.name == 'linux' else
             ('darwin' if self.m.platform.name == 'mac' else 'win'),
-        'REVISION': self.get_commit(checkout_path)
+        'REVISION':
+            self.get_commit(checkout_path)
     }
     if self.m.properties.get('gn_artifacts', False):
       env['FLUTTER_STORAGE_BASE_URL'] = 'https://storage.googleapis.com/flutter_archives_v2'
@@ -249,7 +346,9 @@
 
   def engine_environment(self, checkout_path):
     """Returns env and env_prefixes of an flutter/dart command environment."""
-    dart_bin = checkout_path.join('third_party', 'dart', 'tools', 'sdks', 'dart-sdk', 'bin')
+    dart_bin = checkout_path.join(
+        'third_party', 'dart', 'tools', 'sdks', 'dart-sdk', 'bin'
+    )
     git_ref = self.m.properties.get('git_ref', '')
     android_home = checkout_path.join('third_party', 'android_tools', 'sdk')
     env = {
@@ -264,13 +363,17 @@
             re.sub('refs\/pull\/|\/head', '', git_ref),
         'LUCI_BRANCH':
             self.m.properties.get('release_ref', '').replace('refs/heads/', ''),
-        'GIT_BRANCH': self.get_branch(checkout_path.join('flutter')),
+        'GIT_BRANCH':
+            self.get_branch(checkout_path.join('flutter')),
         'OS':
             'linux' if self.m.platform.name == 'linux' else
             ('darwin' if self.m.platform.name == 'mac' else 'win'),
-        'ANDROID_HOME': str(android_home),
-        'LUCI_WORKDIR': str(self.m.path['start_dir']),
-        'REVISION': self.m.buildbucket.gitiles_commit.id or ''
+        'ANDROID_HOME':
+            str(android_home),
+        'LUCI_WORKDIR':
+            str(self.m.path['start_dir']),
+        'REVISION':
+            self.m.buildbucket.gitiles_commit.id or ''
     }
     env_prefixes = {'PATH': ['%s' % str(dart_bin)]}
     return env, env_prefixes
diff --git a/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json b/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
index 8838d36..51f45e6 100644
--- a/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
+++ b/recipe_modules/repo_util/examples/full.expected/first_bot_update_failed.json
@@ -816,10 +816,10 @@
       "The recipe has crashed at point 'Uncaught exception'!",
       "",
       "Traceback (most recent call last):",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 29, in RunSteps",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 33, in RunSteps",
       "    api.repo_util.engine_checkout(api.path['start_dir'].join('engine'), {}, {})",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 96, in engine_checkout",
-      "    self.m.retry.wrap(_InnerCheckout, step_name='Checkout source', sleep=10.0, backoff_factor=5, max_attempts=4)",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 91, in engine_checkout",
+      "    self.m.retry.wrap(",
       "  File \"RECIPE_REPO[flutter]/recipe_modules/retry/api.py\", line 88, in wrap",
       "    step = self.m.step.active_result",
       "  File \"RECIPE_REPO[recipe_engine]/recipe_modules/step/api.py\", in active_result",
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo.json b/recipe_modules/repo_util/examples/full.expected/monorepo.json
new file mode 100644
index 0000000..cc9b66f
--- /dev/null
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo.json
@@ -0,0 +1,1297 @@
+[
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/engine"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/engine",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/engine"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "main",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
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+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Clobber git cache",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Ensure checkout cache",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
+      "--spec-path",
+      "cache_dir = '[CACHE]/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'monorepo', 'url': 'https://dart.googlesource.com/monorepo'}]",
+      "--revision_mapping_file",
+      "{\"got_buildroot_revision\": \"engine/src\", \"got_dart_revision\": \"engine/src/third_party/dart\", \"got_engine_revision\": \"engine/src/flutter\", \"got_flutter_revision\": \"flutter\", \"got_monorepo_revision\": \"monorepo\"}",
+      "--git-cache-dir",
+      "[CACHE]/git",
+      "--cleanup-dir",
+      "[CLEANUP]/bot_update",
+      "--output_json",
+      "/path/to/tmp/json",
+      "--revision",
+      "monorepo@2d72510e447ab60a9728aeea2362d8be2cbd7789",
+      "--refs",
+      "refs/heads/main"
+    ],
+    "env": {
+      "DEPOT_TOOLS_REPORT_BUILD": "project/ci/builder/8945511751514863184",
+      "GIT_HTTP_LOW_SPEED_LIMIT": "102400",
+      "GIT_HTTP_LOW_SPEED_TIME": "1800"
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.bot_update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@Some step text@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision_cp\": \"refs/heads/main@{#278358}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision_cp\": \"refs/heads/main@{#135384}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision_cp\": \"refs/heads/main@{#14355}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision_cp\": \"refs/heads/main@{#268536}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision_cp\": \"refs/heads/main@{#255931}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision\": \"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"source_manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"directories\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"version\": 0@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision@\"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision_cp@\"refs/heads/main@{#278358}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision@\"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision_cp@\"refs/heads/main@{#135384}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision@\"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision_cp@\"refs/heads/main@{#14355}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision@\"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision_cp@\"refs/heads/main@{#268536}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision@\"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision_cp@\"refs/heads/main@{#255931}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_REPO[depot_tools]/gclient.py",
+      "runhooks"
+    ],
+    "env": {
+      "DEPOT_TOOLS_REPORT_BUILD": "project/ci/builder/8945511751514863184"
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.gclient runhooks",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json b/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json
new file mode 100644
index 0000000..2f19fe2
--- /dev/null
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo_first_bot_update_failed.json
@@ -0,0 +1,1405 @@
+[
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/engine"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/engine",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/engine"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "main",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
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+      "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
+      "--spec-path",
+      "cache_dir = '[CACHE]/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'monorepo', 'url': 'https://dart.googlesource.com/monorepo'}]",
+      "--revision_mapping_file",
+      "{\"got_buildroot_revision\": \"engine/src\", \"got_dart_revision\": \"engine/src/third_party/dart\", \"got_engine_revision\": \"engine/src/flutter\", \"got_flutter_revision\": \"flutter\", \"got_monorepo_revision\": \"monorepo\"}",
+      "--git-cache-dir",
+      "[CACHE]/git",
+      "--cleanup-dir",
+      "[CLEANUP]/bot_update",
+      "--output_json",
+      "/path/to/tmp/json",
+      "--revision",
+      "monorepo@2d72510e447ab60a9728aeea2362d8be2cbd7789",
+      "--refs",
+      "refs/heads/main"
+    ],
+    "env": {
+      "DEPOT_TOOLS_REPORT_BUILD": "project/ci/builder/8945511751514863184",
+      "GIT_HTTP_LOW_SPEED_LIMIT": "102400",
+      "GIT_HTTP_LOW_SPEED_TIME": "1800"
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.bot_update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@Some step text@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision_cp\": \"refs/heads/main@{#278358}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision_cp\": \"refs/heads/main@{#135384}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision_cp\": \"refs/heads/main@{#14355}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision_cp\": \"refs/heads/main@{#268536}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision_cp\": \"refs/heads/main@{#255931}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision\": \"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"source_manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"directories\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"version\": 0@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision@\"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision_cp@\"refs/heads/main@{#278358}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision@\"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision_cp@\"refs/heads/main@{#135384}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision@\"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision_cp@\"refs/heads/main@{#14355}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision@\"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision_cp@\"refs/heads/main@{#268536}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision@\"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision_cp@\"refs/heads/main@{#255931}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@",
+      "@@@STEP_EXCEPTION@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[START_DIR]"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Clobber cache (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[CACHE]/git"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Clobber git cache (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Ensure checkout cache (2)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 31, in RunSteps",
+      "    api.repo_util.monorepo_checkout(api.path['start_dir'], {}, {})",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 168, in monorepo_checkout",
+      "    self.m.retry.wrap(",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/retry/api.py\", line 88, in wrap",
+      "    step = self.m.step.active_result",
+      "  File \"RECIPE_REPO[recipe_engine]/recipe_modules/step/api.py\", in active_result",
+      "    return self.step_client.previous_step_result()",
+      "  File \"RECIPE_REPO[recipe_engine]/recipe_engine/recipe_api.py\", in previous_step_result",
+      "    raise ValueError(",
+      "ValueError('No steps have been run yet, and you are asking for a previous step result.')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('No steps have been run yet, and you are asking for a previous step result.')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json b/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json
new file mode 100644
index 0000000..dc162ee
--- /dev/null
+++ b/recipe_modules/repo_util/examples/full.expected/monorepo_wrong_host.json
@@ -0,0 +1,1019 @@
+[
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "master",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/engine"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/engine",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/engine"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "main",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/engine",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/engine.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/cocoon"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/cocoon",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/cocoon"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "main",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/cocoon",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/cocoon.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/packages"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/packages",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/packages"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "main",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/packages",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/packages.submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Checkout flutter/flutter (2)"
+  },
+  {
+    "cmd": [
+      "python3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[START_DIR]/flutter",
+      "--url",
+      "https://flutter.googlesource.com/mirrors/flutter"
+    ],
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).git setup",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "fetch",
+      "origin",
+      "--recurse-submodules",
+      "--progress",
+      "--tags"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "env": {
+      "PATH": "RECIPE_REPO[depot_tools]:<PATH>"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).git fetch",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).git checkout",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).read revision",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"deadbeef\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).git clean",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).submodule sync",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout flutter/flutter (2).submodule update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[START_DIR]/flutter",
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "project:ci"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "git rev-parse"
+  },
+  {
+    "cmd": [],
+    "name": "RECIPE CRASH (Uncaught exception)",
+    "~followup_annotations": [
+      "@@@STEP_EXCEPTION@@@",
+      "The recipe has crashed at point 'Uncaught exception'!",
+      "",
+      "Traceback (most recent call last):",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/full.py\", line 31, in RunSteps",
+      "    api.repo_util.monorepo_checkout(api.path['start_dir'], {}, {})",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 116, in monorepo_checkout",
+      "    raise ValueError(",
+      "ValueError('Input reference is not on dart.googlesource.com/monorepo')"
+    ]
+  },
+  {
+    "failure": {
+      "humanReason": "Uncaught Exception: ValueError('Input reference is not on dart.googlesource.com/monorepo')"
+    },
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipe_modules/repo_util/examples/full.py b/recipe_modules/repo_util/examples/full.py
index ffcc66a..85edb3e 100644
--- a/recipe_modules/repo_util/examples/full.py
+++ b/recipe_modules/repo_util/examples/full.py
@@ -6,6 +6,7 @@
 
 DEPS = [
     'flutter/repo_util',
+    'recipe_engine/buildbucket',
     'recipe_engine/context',
     'recipe_engine/path',
     'recipe_engine/properties',
@@ -26,7 +27,10 @@
   env, env_paths = api.repo_util.engine_environment(flutter_checkout_path)
   env, env_paths = api.repo_util.flutter_environment(flutter_checkout_path)
   api.repo_util.in_release_and_main(flutter_checkout_path)
-  api.repo_util.engine_checkout(api.path['start_dir'].join('engine'), {}, {})
+  if api.buildbucket.gitiles_commit.project == 'monorepo':
+    api.repo_util.monorepo_checkout(api.path['start_dir'], {}, {})
+  else:
+    api.repo_util.engine_checkout(api.path['start_dir'].join('engine'), {}, {})
   with api.context(env=env, env_prefixes=env_paths):
     api.repo_util.sdk_checkout_path()
 
@@ -43,6 +47,32 @@
           api.step_data('Identify branches (3).git branch', stdout=api.raw_io.output_text('branch1\nbranch2')))
   )
   yield api.test('failed_flutter_environment')
+  yield api.test(
+      'monorepo', api.repo_util.flutter_environment_data(),
+      api.buildbucket.ci_build(
+          git_repo='https://dart.googlesource.com/monorepo',
+          git_ref='refs/heads/main'
+      )
+  )
+  yield api.test(
+      'monorepo_wrong_host', api.repo_util.flutter_environment_data(),
+      api.buildbucket.ci_build(
+          git_repo='https://not-dart.googlesource.com/monorepo',
+          git_ref='refs/heads/main'
+      ), api.expect_exception('ValueError')
+  )
+  yield api.test(
+      'monorepo_first_bot_update_failed',
+      api.repo_util.flutter_environment_data(),
+      api.buildbucket.ci_build(
+          git_repo='https://dart.googlesource.com/monorepo',
+          git_ref='refs/heads/main'
+      ),
+      # Next line force a fail condition for the bot update
+      # first execution.
+      api.expect_exception('ValueError'),
+      api.step_data("Checkout source code.bot_update", retcode=1)
+  )
   yield (
       api.test(
           'bot_update',
diff --git a/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json b/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
index 6d8af43..3008e39 100644
--- a/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
+++ b/recipe_modules/repo_util/examples/unsupported.expected/unsupported.json
@@ -9,7 +9,7 @@
       "Traceback (most recent call last):",
       "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/examples/unsupported.py\", line 15, in RunSteps",
       "    api.repo_util.checkout('unsupported_repo', repo_dir)",
-      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 111, in checkout",
+      "  File \"RECIPE_REPO[flutter]/recipe_modules/repo_util/api.py\", line 189, in checkout",
       "    raise ValueError('Unsupported repo: %s' % name)",
       "ValueError('Unsupported repo: unsupported_repo')"
     ]
diff --git a/recipes/engine_v2/builder.expected/monorepo.json b/recipes/engine_v2/builder.expected/monorepo.json
new file mode 100644
index 0000000..0780d63
--- /dev/null
+++ b/recipes/engine_v2/builder.expected/monorepo.json
@@ -0,0 +1,1619 @@
+[
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[CACHE]/builder/src/out"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Clobber build output"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[CACHE]/builder"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Ensure checkout cache"
+  },
+  {
+    "cmd": [],
+    "name": "Checkout source code"
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[CACHE]/builder"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Clobber cache",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "rmtree",
+      "[CACHE]/git"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Clobber git cache",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[CACHE]/builder"
+    ],
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.Ensure checkout cache",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
+      "--spec-path",
+      "cache_dir = '[CACHE]/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'monorepo', 'url': 'https://dart.googlesource.com/monorepo'}]",
+      "--revision_mapping_file",
+      "{\"got_buildroot_revision\": \"engine/src\", \"got_dart_revision\": \"engine/src/third_party/dart\", \"got_engine_revision\": \"engine/src/flutter\", \"got_flutter_revision\": \"flutter\", \"got_monorepo_revision\": \"monorepo\"}",
+      "--git-cache-dir",
+      "[CACHE]/git",
+      "--cleanup-dir",
+      "[CLEANUP]/bot_update",
+      "--output_json",
+      "/path/to/tmp/json",
+      "--revision",
+      "monorepo@2d72510e447ab60a9728aeea2362d8be2cbd7789",
+      "--refs",
+      "refs/heads/main"
+    ],
+    "cwd": "[CACHE]/builder",
+    "env": {
+      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "DEPOT_TOOLS_REPORT_BUILD": "dart/ci.sandbox/builder/8945511751514863184",
+      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder/src",
+      "ENGINE_PATH": "[CACHE]/builder",
+      "GIT_BRANCH": "",
+      "GIT_HTTP_LOW_SPEED_LIMIT": "102400",
+      "GIT_HTTP_LOW_SPEED_TIME": "1800",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "LUCI_WORKDIR": "[START_DIR]",
+      "OS": "linux",
+      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0",
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.bot_update",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@Some step text@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"repository\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_failure\": false, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"patch_root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"properties\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_buildroot_revision_cp\": \"refs/heads/main@{#278358}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_dart_revision_cp\": \"refs/heads/main@{#135384}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_engine_revision_cp\": \"refs/heads/main@{#14355}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_flutter_revision_cp\": \"refs/heads/main@{#268536}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_monorepo_revision_cp\": \"refs/heads/main@{#255931}\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"got_revision\": \"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"root\": \"monorepo\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"source_manifest\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"directories\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"engine/src/third_party/dart\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/engine/src/third_party/dart.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"flutter\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/flutter.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }, @@@",
+      "@@@STEP_LOG_LINE@json.output@      \"monorepo\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"git_checkout\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"repo_url\": \"https://fake.org/monorepo.git\", @@@",
+      "@@@STEP_LOG_LINE@json.output@          \"revision\": \"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@STEP_LOG_LINE@json.output@        }@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }, @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"version\": 0@@@",
+      "@@@STEP_LOG_LINE@json.output@  }, @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"step_text\": \"Some step text\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision@\"851705163d0a071411a2461348b2fa0f4365dd2b\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_buildroot_revision_cp@\"refs/heads/main@{#278358}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision@\"56b272d88fce292881d9d6a89d1a88b53f868a7f\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_dart_revision_cp@\"refs/heads/main@{#135384}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision@\"8d715353df333b3d997121c3d17cfe043f0a33ee\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_engine_revision_cp@\"refs/heads/main@{#14355}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision@\"ff25d17873bba4bc564d8c7217280aa254ed4541\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_flutter_revision_cp@\"refs/heads/main@{#268536}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision@\"2d72510e447ab60a9728aeea2362d8be2cbd7789\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_monorepo_revision_cp@\"refs/heads/main@{#255931}\"@@@",
+      "@@@SET_BUILD_PROPERTY@got_revision@\"46cec4dbb087a7b43490e8c82b6899fa32937bd9\"@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_REPO[depot_tools]/gclient.py",
+      "runhooks"
+    ],
+    "cwd": "[CACHE]/builder",
+    "env": {
+      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "DEPOT_TOOLS_REPORT_BUILD": "dart/ci.sandbox/builder/8945511751514863184",
+      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder/src",
+      "ENGINE_PATH": "[CACHE]/builder",
+      "GIT_BRANCH": "",
+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "LUCI_WORKDIR": "[START_DIR]",
+      "OS": "linux",
+      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    },
+    "env_prefixes": {
+      "PATH": [
+        "[CACHE]/builder/src/third_party/dart/tools/sdks/dart-sdk/bin"
+      ]
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]",
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Checkout source code.gclient runhooks",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "ensure goma"
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[CACHE]/goma/client",
+      "-ensure-file",
+      "fuchsia/third_party/goma/client/${platform} integration",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "ensure goma.ensure_installed",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"result\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"instance_id\": \"resolved-instance_id-of-integration-----\", @@@",
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+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "[CACHE]/builder/engine/src/flutter/tools/gn",
+      "--goma",
+      "--ios"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client"
+    },
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "gn --ios"
+  },
+  {
+    "cmd": [],
+    "name": "setup goma"
+  },
+  {
+    "cmd": [],
+    "name": "setup goma.ensure cpython3",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "vpython3",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "RECIPE_MODULE[fuchsia::python3]/resources/tool_manifest.json",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "GLOG_log_dir": "[CLEANUP]",
+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "setup goma.ensure cpython3.read manifest",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@",
+      "@@@STEP_LOG_LINE@tool_manifest.json@{@@@",
+      "@@@STEP_LOG_LINE@tool_manifest.json@  \"path\": \"path/to/cpython3\",@@@",
+      "@@@STEP_LOG_LINE@tool_manifest.json@  \"version\": \"version:pinned-version\"@@@",
+      "@@@STEP_LOG_LINE@tool_manifest.json@}@@@",
+      "@@@STEP_LOG_END@tool_manifest.json@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "setup goma.ensure cpython3.install path/to/cpython3",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@2@@@"
+    ]
+  },
+  {
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+      "--json-output",
+      "/path/to/tmp/json",
+      "ensure-directory",
+      "--mode",
+      "0777",
+      "[START_DIR]/cipd_tool/path/to/cpython3/version%3Apinned-version"
+    ],
+    "env": {
+      "GLOG_log_dir": "[CLEANUP]",
+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+      },
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+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "setup goma.ensure cpython3.install path/to/cpython3.ensure package directory",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@3@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "cipd",
+      "ensure",
+      "-root",
+      "[START_DIR]/cipd_tool/path/to/cpython3/version%3Apinned-version",
+      "-ensure-file",
+      "path/to/cpython3 version:pinned-version",
+      "-max-threads",
+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "GLOG_log_dir": "[CLEANUP]",
+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "setup goma.ensure cpython3.install path/to/cpython3.ensure_installed",
+    "~followup_annotations": [
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+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "[START_DIR]/cipd_tool/path/to/cpython3/version%3Apinned-version/bin/python3",
+      "[CACHE]/goma/client/goma_ctl.py",
+      "restart"
+    ],
+    "env": {
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+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
+    "infra_step": true,
+    "luci_context": {
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "setup goma.start goma",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "RECIPE_REPO[depot_tools]/ninja",
+      "-j",
+      "100",
+      "-C",
+      "[CACHE]/builder/engine/src/out/ios_debug"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
+    "env_suffixes": {
+      "DEPOT_TOOLS_UPDATE": [
+        "0"
+      ],
+      "PATH": [
+        "RECIPE_REPO[depot_tools]"
+      ]
+    },
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
+        "current_invocation": {
+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "build ios_debug"
+  },
+  {
+    "cmd": [],
+    "name": "teardown goma"
+  },
+  {
+    "cmd": [
+      "[START_DIR]/cipd_tool/path/to/cpython3/version%3Apinned-version/bin/python3",
+      "[CACHE]/goma/client/goma_ctl.py",
+      "jsonstatus",
+      "[CACHE]/goma/client/jsonstatus"
+    ],
+    "env": {
+      "GLOG_log_dir": "[CLEANUP]",
+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
+    "luci_context": {
+      "realm": {
+        "name": "dart:ci.sandbox"
+      },
+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.goma jsonstatus",
+    "~followup_annotations": [
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+      "@@@STEP_LOG_LINE@json.output@  \"notice\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    {@@@",
+      "@@@STEP_LOG_LINE@json.output@      \"infra_status\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"num_user_error\": 0, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"ping_status_code\": 200@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    }@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "[START_DIR]/cipd_tool/path/to/cpython3/version%3Apinned-version/bin/python3",
+      "[CACHE]/goma/client/goma_ctl.py",
+      "stat"
+    ],
+    "env": {
+      "GLOG_log_dir": "[CLEANUP]",
+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_DUMP_STATS_FILE": "[CACHE]/goma/client/goma_stats.json",
+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
+      "GOMA_STORE_LOCAL_RUN_OUTPUT": "True",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.goma stats",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
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+      "[CACHE]/goma/client/goma_ctl.py",
+      "stop"
+    ],
+    "env": {
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+      "GOMA_CACHE_DIR": "[CACHE]/goma",
+      "GOMA_DEPS_CACHE_FILE": "goma_deps_cache",
+      "GOMA_DIR": "[CACHE]/goma/client",
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+      "GOMA_LOCAL_OUTPUT_CACHE_DIR": "[CACHE]/goma/localoutputcache",
+      "GOMA_MAX_SUM_OUTPUT_SIZE_IN_MB": "256",
+      "GOMA_SERVER_HOST": "rbe-prod1.endpoints.fuchsia-infra-goma-prod.cloud.goog",
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+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
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+    },
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+      },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.stop goma",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "[CLEANUP]/compiler_proxy.WARNING",
+      "/path/to/tmp/"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
+    "infra_step": true,
+    "luci_context": {
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+      },
+      "resultdb": {
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+          "name": "invocations/build:8945511751514863184",
+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.read goma_client warning log",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@compiler_proxy.WARNING@test log@@@",
+      "@@@STEP_LOG_END@compiler_proxy.WARNING@@@"
+    ]
+  },
+  {
+    "cmd": [
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+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "[CACHE]/goma/client/goma_stats.json",
+      "/path/to/tmp/"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.read goma_stats.json",
+    "~followup_annotations": [
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+      "@@@STEP_LOG_LINE@json.output@    \"build_info\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"build_id\": 8945511751514863184, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"builder\": \"builder\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"time_stamp\": \"2012-05-14 12:53:21.500000\", @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"time_stamp_int\": 1337000003000@@@",
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+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "teardown goma.ensure bqupload",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
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+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "RECIPE_MODULE[fuchsia::bqupload]/resources/tool_manifest.json",
+      "/path/to/tmp/json"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.ensure bqupload.read manifest",
+    "~followup_annotations": [
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+      "@@@STEP_LOG_LINE@tool_manifest.json@}@@@",
+      "@@@STEP_LOG_END@tool_manifest.json@@@"
+    ]
+  },
+  {
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+    "name": "teardown goma.ensure bqupload.install path/to/bqupload",
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+      "@@@STEP_NEST_LEVEL@2@@@"
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+  },
+  {
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+      "ensure-directory",
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+      "[START_DIR]/cipd_tool/path/to/bqupload/version%3Apinned-version"
+    ],
+    "env": {
+      "GOMA_DIR": "[CACHE]/goma/client",
+      "GOMA_TMP_DIR": "[CLEANUP]/goma",
+      "GOMA_USE_LOCAL": "False"
+    },
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
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+    },
+    "name": "teardown goma.ensure bqupload.install path/to/bqupload.ensure package directory",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@3@@@"
+    ]
+  },
+  {
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+      "-ensure-file",
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+      "0",
+      "-json-output",
+      "/path/to/tmp/json"
+    ],
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+      "GOMA_DIR": "[CACHE]/goma/client",
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "teardown goma.ensure bqupload.install path/to/bqupload.ensure_installed",
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+  },
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+    "name": "Ensuring [CLEANUP]/host_debug_unopt_tmp_1/out/host_debug_unopt"
+  },
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+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
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+  },
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+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
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+      "RECIPE_MODULE[recipe_engine::cas]/resources/infra.sha1",
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+    "cwd": "[CACHE]/builder/engine/src/flutter",
+    "env": {
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+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder/src",
+      "ENGINE_PATH": "[CACHE]/builder",
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "LUCI_WORKDIR": "[START_DIR]",
+      "OS": "linux",
+      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    },
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+    "infra_step": true,
+    "luci_context": {
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+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "read infra revision",
+    "~followup_annotations": [
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+      "@@@STEP_LOG_END@infra.sha1@@@"
+    ]
+  },
+  {
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+    "name": "install infra/tools/luci/cas"
+  },
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+      "ENGINE_PATH": "[CACHE]/builder",
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "LUCI_WORKDIR": "[START_DIR]",
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+    "name": "install infra/tools/luci/cas.ensure package directory",
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+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
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+      "ensure",
+      "-root",
+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision",
+      "-ensure-file",
+      "infra/tools/luci/cas/${platform} git_revision:mock_infra_git_revision",
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+        "hostname": "rdbhost"
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+    },
+    "name": "install infra/tools/luci/cas.ensure_installed",
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+      "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/luci/cas/resolved-platform\"@@@",
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+      "@@@STEP_LOG_LINE@json.output@}@@@",
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+  {
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+      "[START_DIR]/cipd_tool/infra/tools/luci/cas/git_revision%3Amock_infra_git_revision/cas",
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+      "-dump-digest",
+      "/path/to/tmp/",
+      "-paths",
+      "[CLEANUP]/host_debug_unopt_tmp_1:."
+    ],
+    "cwd": "[CACHE]/builder/engine/src/flutter",
+    "env": {
+      "ANDROID_HOME": "[CACHE]/builder/src/third_party/android_tools/sdk",
+      "DEPOT_TOOLS": "RECIPE_REPO[depot_tools]",
+      "ENGINE_CHECKOUT_PATH": "[CACHE]/builder/src",
+      "ENGINE_PATH": "[CACHE]/builder",
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+      "LUCI_BRANCH": "",
+      "LUCI_CI": "True",
+      "LUCI_PR": "",
+      "LUCI_WORKDIR": "[START_DIR]",
+      "OS": "linux",
+      "REVISION": "2d72510e447ab60a9728aeea2362d8be2cbd7789"
+    },
+    "env_prefixes": {
+      "PATH": [
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+    },
+    "infra_step": true,
+    "luci_context": {
+      "realm": {
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+      },
+      "resultdb": {
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+          "update_token": "token"
+        },
+        "hostname": "rdbhost"
+      }
+    },
+    "name": "Archive host_debug_unopt",
+    "~followup_annotations": [
+      "@@@STEP_LINK@CAS UI@https://cas-viewer.appspot.com/projects/example-cas-server/instances/default_instance/blobs/e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0/tree@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "Set output properties",
+    "~followup_annotations": [
+      "@@@SET_BUILD_PROPERTY@cas_output_hash@{\"host_debug_unopt\": \"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855/0\"}@@@"
+    ]
+  },
+  {
+    "name": "$result"
+  }
+]
\ No newline at end of file
diff --git a/recipes/engine_v2/builder.py b/recipes/engine_v2/builder.py
index ac9ad4e..233102a 100644
--- a/recipes/engine_v2/builder.py
+++ b/recipes/engine_v2/builder.py
@@ -44,6 +44,7 @@
     'flutter/osx_sdk',
     'flutter/repo_util',
     'fuchsia/cas_util',
+    'recipe_engine/buildbucket',
     'recipe_engine/context',
     'recipe_engine/file',
     'recipe_engine/path',
@@ -156,9 +157,15 @@
   env['ENGINE_PATH'] = api.path['cache'].join('builder')
 
   custom_vars = api.properties.get('gclient_custom_vars', {})
-  api.repo_util.engine_checkout(
-      cache_root, env, env_prefixes, custom_vars=custom_vars
-  )
+  if api.buildbucket.gitiles_commit.project == 'monorepo':
+    api.repo_util.monorepo_checkout(
+        cache_root, env, env_prefixes, custom_vars=custom_vars
+    )
+    checkout = api.path['cache'].join('builder', 'engine', 'src')
+  else:
+    api.repo_util.engine_checkout(
+        cache_root, env, env_prefixes, custom_vars=custom_vars
+    )
   outputs = {}
   if api.platform.is_mac:
     with api.osx_sdk('ios'):
@@ -206,6 +213,19 @@
           api.path['cache'].join('builder', 'src', 'dev', 'file.txt'),
       )
   )
+  yield api.test(
+      'monorepo', api.properties(build=build, goma_jobs="100"),
+      api.buildbucket.ci_build(
+          project='dart',
+          bucket='ci.sandbox',
+          git_repo='https://dart.googlesource.com/monorepo',
+          git_ref='refs/heads/main'
+      ),
+      api.path.exists(
+          api.path['cache'].join('builder', 'src', 'dev'),
+          api.path['cache'].join('builder', 'src', 'dev', 'file.txt'),
+      )
+  )
   build_custom = dict(build)
   build_custom["gclient_custom_vars"] = {"example_custom_var": True}
   build_custom["tests"] = []