[
  {
    "cmd": [
      "cipd",
      "ensure",
      "-root",
      "[CACHE]/osx_sdk/xcode_12a7209",
      "-ensure-file",
      "infra/tools/mac_toolchain/${platform} latest",
      "-max-threads",
      "0",
      "-json-output",
      "/path/to/tmp/json"
    ],
    "infra_step": true,
    "name": "ensure_installed",
    "~followup_annotations": [
      "@@@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-latest----------\", @@@",
      "@@@STEP_LOG_LINE@json.output@        \"package\": \"infra/tools/mac_toolchain/resolved-platform\"@@@",
      "@@@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": [
      "[CACHE]/osx_sdk/xcode_12a7209/mac_toolchain",
      "install",
      "-kind",
      "mac",
      "-xcode-version",
      "12a7209",
      "-output-dir",
      "[CACHE]/osx_sdk/xcode_12a7209/XCode.app",
      "-cipd-package-prefix",
      "flutter_internal/ios/xcode",
      "-with-runtime=True"
    ],
    "infra_step": true,
    "name": "install xcode"
  },
  {
    "cmd": [
      "killall",
      "-9",
      "com.apple.CoreSimulator.CoreSimulatorDevice"
    ],
    "infra_step": true,
    "name": "kill dart"
  },
  {
    "cmd": [
      "sudo",
      "xcode-select",
      "--switch",
      "[CACHE]/osx_sdk/xcode_12a7209/XCode.app"
    ],
    "infra_step": true,
    "name": "select XCode"
  },
  {
    "cmd": [
      "xcrun",
      "simctl",
      "list"
    ],
    "infra_step": true,
    "name": "list simulators"
  },
  {
    "cmd": [
      "gn",
      "gen",
      "out/Release"
    ],
    "name": "gn"
  },
  {
    "cmd": [
      "ninja",
      "-C",
      "out/Release"
    ],
    "name": "ninja"
  },
  {
    "cmd": [
      "sudo",
      "xcode-select",
      "--reset"
    ],
    "infra_step": true,
    "name": "reset XCode"
  },
  {
    "name": "$result"
  }
]