1# Copyright 2013 The Chromium Authors. All rights reserved. 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5"""Script that is used by PRESUBMIT.py to run style checks on Java files.""" 6 7import os 8import subprocess 9 10 11def RunCheckstyle(input_api, output_api, style_file): 12 if not os.path.exists(style_file): 13 file_error = (' Java checkstyle configuration file is missing: ' 14 + style_file) 15 return [output_api.PresubmitError(file_error)] 16 17 # Filter out non-Java files and files that were deleted. 18 java_files = [x.LocalPath() for x in input_api.AffectedFiles(False, False) 19 if os.path.splitext(x.LocalPath())[1] == '.java'] 20 if not java_files: 21 return [] 22 23 # Run checkstyle 24 checkstyle_env = os.environ.copy() 25 checkstyle_env['JAVA_CMD'] = 'java' 26 try: 27 check = subprocess.Popen(['checkstyle', '-c', style_file] + java_files, 28 stdout=subprocess.PIPE, env=checkstyle_env) 29 stdout, _ = check.communicate() 30 if check.returncode == 0: 31 return [] 32 except OSError as e: 33 import errno 34 if e.errno == errno.ENOENT: 35 install_error = (' checkstyle is not installed. Please run ' 36 'build/install-build-deps-android.sh') 37 return [output_api.PresubmitPromptWarning(install_error)] 38 39 # Remove non-error values from stdout 40 errors = stdout.splitlines() 41 42 if errors and errors[0] == 'Starting audit...': 43 del errors[0] 44 if errors and errors[-1] == 'Audit done.': 45 del errors[-1] 46 47 # Filter out warnings 48 errors = [x for x in errors if 'warning: ' not in x] 49 if not errors: 50 return [] 51 52 local_path = input_api.PresubmitLocalPath() 53 output = [] 54 for error in errors: 55 # Change the full file path to relative path in the output lines 56 full_path, end = error.split(':', 1) 57 rel_path = os.path.relpath(full_path, local_path) 58 output.append(' %s:%s' % (rel_path, end)) 59 return [output_api.PresubmitPromptWarning('\n'.join(output))]