1 files changed, 212 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/android/gyp/nocompile_test.py b/third_party/libwebrtc/build/android/gyp/nocompile_test.py
new file mode 100755
index 0000000000..69fb395067
--- /dev/null
+++ b/third_party/libwebrtc/build/android/gyp/nocompile_test.py
@@ -0,0 +1,212 @@
+#!/usr/bin/env python3
+# Copyright 2020 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""Checks that compiling targets in BUILD.gn file fails."""
+
+import argparse
+import json
+import os
+import subprocess
+import re
+import sys
+from util import build_utils
+
+_CHROMIUM_SRC = os.path.normpath(os.path.join(__file__, '..', '..', '..', '..'))
+_NINJA_PATH = os.path.join(_CHROMIUM_SRC, 'third_party', 'depot_tools', 'ninja')
+
+# Relative to _CHROMIUM_SRC
+_GN_SRC_REL_PATH = os.path.join('third_party', 'depot_tools', 'gn')
+
+# Regex for determining whether compile failed because 'gn gen' needs to be run.
+_GN_GEN_REGEX = re.compile(r'ninja: (error|fatal):')
+
+
+def _raise_command_exception(args, returncode, output):
+  """Raises an exception whose message describes a command failure.
+
+    Args:
+      args: shell command-line (as passed to subprocess.Popen())
+      returncode: status code.
+      output: command output.
+    Raises:
+      a new Exception.
+    """
+  message = 'Command failed with status {}: {}\n' \
+      'Output:-----------------------------------------\n{}\n' \
+      '------------------------------------------------\n'.format(
+          returncode, args, output)
+  raise Exception(message)
+
+
+def _run_command(args, cwd=None):
+  """Runs shell command. Raises exception if command fails."""
+  p = subprocess.Popen(args,
+                       stdout=subprocess.PIPE,
+                       stderr=subprocess.STDOUT,
+                       cwd=cwd)
+  pout, _ = p.communicate()
+  if p.returncode != 0:
+    _raise_command_exception(args, p.returncode, pout)
+
+
+def _run_command_get_failure_output(args):
+  """Runs shell command.
+
+  Returns:
+      Command output if command fails, None if command succeeds.
+  """
+  p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+  pout, _ = p.communicate()
+
+  if p.returncode == 0:
+    return None
+
+  # For Python3 only:
+  if isinstance(pout, bytes) and sys.version_info >= (3, ):
+    pout = pout.decode('utf-8')
+  return '' if pout is None else pout
+
+
+def _copy_and_append_gn_args(src_args_path, dest_args_path, extra_args):
+  """Copies args.gn.
+
+    Args:
+      src_args_path: args.gn file to copy.
+      dest_args_path: Copy file destination.
+      extra_args: Text to append to args.gn after copy.
+    """
+  with open(src_args_path) as f_in, open(dest_args_path, 'w') as f_out:
+    f_out.write(f_in.read())
+    f_out.write('\n')
+    f_out.write('\n'.join(extra_args))
+
+
+def _find_regex_in_test_failure_output(test_output, regex):
+  """Searches for regex in test output.
+
+    Args:
+      test_output: test output.
+      regex: regular expression to search for.
+    Returns:
+      Whether the regular expression was found in the part of the test output
+      after the 'FAILED' message.
+
+      If the regex does not contain '\n':
+        the first 5 lines after the 'FAILED' message (including the text on the
+        line after the 'FAILED' message) is searched.
+      Otherwise:
+        the entire test output after the 'FAILED' message is searched.
+  """
+  if test_output is None:
+    return False
+
+  failed_index = test_output.find('FAILED')
+  if failed_index < 0:
+    return False
+
+  failure_message = test_output[failed_index:]
+  if regex.find('\n') >= 0:
+    return re.search(regex, failure_message)
+
+  return _search_regex_in_list(failure_message.split('\n')[:5], regex)
+
+
+def _search_regex_in_list(value, regex):
+  for line in value:
+    if re.search(regex, line):
+      return True
+  return False
+
+
+def _do_build_get_failure_output(gn_path, gn_cmd, options):
+  # Extract directory from test target. As all of the test targets are declared
+  # in the same BUILD.gn file, it does not matter which test target is used.
+  target_dir = gn_path.rsplit(':', 1)[0]
+
+  if gn_cmd is not None:
+    gn_args = [
+        _GN_SRC_REL_PATH, '--root-target=' + target_dir, gn_cmd,
+        os.path.relpath(options.out_dir, _CHROMIUM_SRC)
+    ]
+    _run_command(gn_args, cwd=_CHROMIUM_SRC)
+
+  ninja_args = [_NINJA_PATH, '-C', options.out_dir, gn_path]
+  return _run_command_get_failure_output(ninja_args)
+
+
+def main():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--gn-args-path',
+                      required=True,
+                      help='Path to args.gn file.')
+  parser.add_argument('--test-configs-path',
+                      required=True,
+                      help='Path to file with test configurations')
+  parser.add_argument('--out-dir',
+                      required=True,
+                      help='Path to output directory to use for compilation.')
+  parser.add_argument('--stamp', help='Path to touch.')
+  options = parser.parse_args()
+
+  with open(options.test_configs_path) as f:
+    # Escape '\' in '\.' now. This avoids having to do the escaping in the test
+    # specification.
+    config_text = f.read().replace(r'\.', r'\\.')
+    test_configs = json.loads(config_text)
+
+  if not os.path.exists(options.out_dir):
+    os.makedirs(options.out_dir)
+
+  out_gn_args_path = os.path.join(options.out_dir, 'args.gn')
+  extra_gn_args = [
+      'enable_android_nocompile_tests = true',
+      'treat_warnings_as_errors = true',
+      # GOMA does not work with non-standard output directories.
+      'use_goma = false',
+  ]
+  _copy_and_append_gn_args(options.gn_args_path, out_gn_args_path,
+                           extra_gn_args)
+
+  ran_gn_gen = False
+  did_clean_build = False
+  error_messages = []
+  for config in test_configs:
+    # Strip leading '//'
+    gn_path = config['target'][2:]
+    expect_regex = config['expect_regex']
+
+    test_output = _do_build_get_failure_output(gn_path, None, options)
+
+    # 'gn gen' takes > 1s to run. Only run 'gn gen' if it is needed for compile.
+    if (test_output
+        and _search_regex_in_list(test_output.split('\n'), _GN_GEN_REGEX)):
+      assert not ran_gn_gen
+      ran_gn_gen = True
+      test_output = _do_build_get_failure_output(gn_path, 'gen', options)
+
+    if (not _find_regex_in_test_failure_output(test_output, expect_regex)
+        and not did_clean_build):
+      # Ensure the failure is not due to incremental build.
+      did_clean_build = True
+      test_output = _do_build_get_failure_output(gn_path, 'clean', options)
+
+    if not _find_regex_in_test_failure_output(test_output, expect_regex):
+      if test_output is None:
+        # Purpose of quotes at beginning of message is to make it clear that
+        # "Compile successful." is not a compiler log message.
+        test_output = '""\nCompile successful.'
+      error_message = '//{} failed.\nExpected compile output pattern:\n'\
+          '{}\nActual compile output:\n{}'.format(
+              gn_path, expect_regex, test_output)
+      error_messages.append(error_message)
+
+  if error_messages:
+    raise Exception('\n'.join(error_messages))
+
+  if options.stamp:
+    build_utils.Touch(options.stamp)
+
+
+if __name__ == '__main__':
+  main()