Update tooling to use clang-format (issue #2171)

tools/fix_style.py

@@ -0,0 +1,101 @@
+# Copyright (c) 2017 The Chromium Embedded Framework Authors.
+# Portions copyright (c) 2011 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.
+
+import os, re, sys
+from clang_util import clang_format
+from file_util import *
+from git_util import get_changed_files
+
+# Valid extensions for files we want to clang-format.
+DEFAULT_LINT_WHITELIST_REGEX = r"(.*\.cpp|.*\.cc|.*\.h|.*\.mm)$"
+DEFAULT_LINT_BLACKLIST_REGEX = r"$^"
+
+def msg(filename, status):
+  if sys.platform == 'win32':
+    # Use Unix path separator.
+    filename = filename.replace("\\", "/")
+
+  if len(filename) > 60:
+    # Truncate the file path in a nice way.
+    filename = filename[-57:]
+    pos = filename.find("/")
+    if pos > 0:
+      filename = filename[pos:]
+    filename = "..." + filename
+
+  print "%-60s %s" % (filename, status)
+
+updatect = 0
+def update_file(filename):
+  oldcontents = read_file(filename)
+  if len(oldcontents) == 0:
+    msg(filename, "empty")
+    return;
+
+  newcontents = clang_format(oldcontents)
+  if newcontents is None:
+    raise Exception("Failed to process %s" % filename)
+
+  if newcontents != oldcontents:
+    msg(filename, "fixed")
+    global updatect
+    updatect += 1
+    write_file(filename, newcontents)
+  else:
+    msg(filename, "ok")
+  return
+
+def fix_style(filenames, white_list = None, black_list = None):
+  """ Execute clang-format with the specified arguments. """
+  if not white_list:
+    white_list = DEFAULT_LINT_WHITELIST_REGEX
+  white_regex = re.compile(white_list)
+  if not black_list:
+    black_list = DEFAULT_LINT_BLACKLIST_REGEX
+  black_regex = re.compile(black_list)
+
+  for filename in filenames:
+    if filename.find('*') > 0:
+      # Expand wildcards.
+      filenames.extend(get_files(filename))
+      continue
+
+    if os.path.isdir(filename):
+      # Add directory contents.
+      filenames.extend(get_files(os.path.join(filename, "*")))
+      continue
+
+    if not os.path.exists(filename):
+      files = get_changed_files(".", filename)
+      if len(files) > 0:
+        filenames.extend(files)
+      else:
+        msg(filename, "missing")
+      continue
+
+    if white_regex.match(filename):
+      if black_regex.match(filename):
+        msg(filename, "ignored")
+      else:
+        update_file(filename)
+    else:
+      msg(filename, "skipped")
+
+if __name__ == "__main__":
+  if len(sys.argv) == 1:
+    print "Usage: %s [file-path|git-hash|unstaged|staged] ..." % sys.argv[0]
+    print "\n Format C, C++ and ObjC files using Chromium's clang-format style."
+    print "\nOptions:"
+    print " file-path\tProcess the specified file or directory."
+    print " \t\tDirectories will be processed recursively."
+    print " \t\tThe \"*\" wildcard character is supported."
+    print " git-hash\tProcess all files changed in the specified Git commit."
+    print " unstaged\tProcess all unstaged files in the Git repo."
+    print " staged\t\tProcess all staged files in the Git repo."
+    sys.exit(1)
+
+  # Process anything passed on the command-line.
+  fix_style(sys.argv[1:])
+  print 'Done - Wrote %d files.' % updatect