1 files changed, 64 insertions, 0 deletions
diff --git a/tools/wrap-logcat.py b/tools/wrap-logcat.py
new file mode 100755
index 00000000000..067890e8702
--- /dev/null
+++ b/tools/wrap-logcat.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+#
+# Copyright 2018, 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 argparse
+import subprocess
+import sys
+import shlex
+
+def main():
+  parser = argparse.ArgumentParser(
+      description='Runs a command while collecting logcat in the background')
+  parser.add_argument('--output', '-o',
+                      type=lambda f: open(f,'w'),
+                      required=True,
+                      action='store',
+                      help='File to store the logcat to. Will be created if not already existing')
+  parser.add_argument('--logcat-invoke',
+                      action='store',
+                      default='adb logcat',
+                      help="""Command to run to retrieve logcat data. Defaults to 'adb logcat'.
+                      It will be run in the background and killed by SIGTERM when the 'command'
+                      finishes.""")
+  parser.add_argument('command',
+                      action='store',
+                      nargs=argparse.REMAINDER,
+                      help='The command to run with logcat in the background.')
+  args = parser.parse_args()
+  if len(args.command) == 0:
+    print("Must have some command to run.", file=sys.stderr)
+    parser.print_help(file=sys.stderr)
+    return 1
+  # Send all output from logcat to the file.
+  with subprocess.Popen(shlex.split(args.logcat_invoke),
+                                    stdout=args.output,
+                                    stderr=subprocess.STDOUT,
+                                    shell=False,
+                                    universal_newlines=True) as logcat_proc:
+    # Let the run-test-proc inherit our stdout FDs
+    with subprocess.Popen(shlex.split(args.command[0]) if len(args.command) == 1 else args.command,
+                          stdout=None,
+                          stderr=None,
+                          shell=False) as run_test_proc:
+      # Don't actually do anything. Just let the run-test proc finish.
+      pass
+    # Send SIGTERM to the logcat process.
+    logcat_proc.kill()
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main())
+