tp: generate python BUILD file from GN

Change-Id: I4b89cc7d9515e5cb8e67b6733a72d237acd02ed9
diff --git a/python/BUILD.gn b/python/BUILD.gn
new file mode 100644
index 0000000..c4632b5
--- /dev/null
+++ b/python/BUILD.gn
@@ -0,0 +1,87 @@
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("../gn/perfetto_python.gni")
+
+perfetto_py_binary("trace_processor_py_example") {
+  sources = [ "example.py" ]
+  deps = [
+    ":trace_processor_py",
+    "../gn:pandas_py",
+  ]
+  main = "example.py"
+}
+
+perfetto_py_library("trace_processor_py") {
+  sources = [
+    "perfetto/trace_processor/__init__.py",
+    "perfetto/trace_processor/api.py",
+    "perfetto/trace_processor/http.py",
+    "perfetto/trace_processor/platform.py",
+    "perfetto/trace_processor/protos.py",
+    "perfetto/trace_processor/shell.py",
+  ]
+  data = [
+    "perfetto/trace_processor/trace_processor.descriptor",
+    "perfetto/trace_processor/metrics.descriptor",
+    "..:trace_processor_shell",
+  ]
+  deps = [
+    ":trace_uri_resolver",
+    "../gn:pandas_py",
+    "../gn:protobuf_py",
+    "../gn:tp_vendor_py",
+  ]
+}
+
+perfetto_py_library("trace_uri_resolver") {
+  sources = [
+    "perfetto/trace_uri_resolver/__init__.py",
+    "perfetto/trace_uri_resolver/path.py",
+    "perfetto/trace_uri_resolver/registry.py",
+    "perfetto/trace_uri_resolver/resolver.py",
+    "perfetto/trace_uri_resolver/util.py",
+  ]
+}
+
+perfetto_py_library("experimental_slice_breakdown_lib") {
+  sources = [
+    "perfetto/experimental/slice_breakdown/__init__.py",
+    "perfetto/experimental/slice_breakdown/breakdown.py",
+  ]
+  deps = [ ":trace_processor_py" ]
+}
+
+perfetto_py_binary("experimental_slice_breakdown_bin") {
+  sources = [ "tools/slice_breakdown.py" ]
+  main = "tools/slice_breakdown.py"
+  deps = [
+    ":experimental_slice_breakdown_lib",
+    ":trace_processor_py",
+    "../gn:pandas_py",
+  ]
+}
+
+perfetto_py_library("batch_trace_processor") {
+  sources = [
+    "perfetto/batch_trace_processor/__init__.py",
+    "perfetto/batch_trace_processor/api.py",
+    "perfetto/batch_trace_processor/platform.py",
+  ]
+  deps = [
+    ":trace_processor_py",
+    "../gn:pandas_py",
+    "../gn:tp_vendor_py",
+  ]
+}