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#!/usr/bin/env python3
#
#===- google-java-format-diff.py - google-java-format Diff Reformatter -----===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
#===------------------------------------------------------------------------===#
"""
google-java-format Diff Reformatter
============================
This script reads input from a unified diff and reformats all the changed
lines. This is useful to reformat all the lines touched by a specific patch.
Example usage for git/svn users:
git diff -U0 HEAD^ | google-java-format-diff.py -p1 -i
svn diff --diff-cmd=diff -x-U0 | google-java-format-diff.py -i
For perforce users:
P4DIFF="git --no-pager diff --no-index" p4 diff | ./google-java-format-diff.py -i -p7
"""
import argparse
import difflib
import re
import string
import subprocess
import io
import sys
from shutil import which
def main():
parser = argparse.ArgumentParser(description=
'Reformat changed lines in diff. Without -i '
'option just output the diff that would be '
'introduced.')
parser.add_argument('-i', action='store_true', default=False,
help='apply edits to files instead of displaying a diff')
parser.add_argument('-p', metavar='NUM', default=0,
help='strip the smallest prefix containing P slashes')
parser.add_argument('-regex', metavar='PATTERN', default=None,
help='custom pattern selecting file paths to reformat '
'(case sensitive, overrides -iregex)')
parser.add_argument('-iregex', metavar='PATTERN', default=r'.*\.java',
help='custom pattern selecting file paths to reformat '
'(case insensitive, overridden by -regex)')
parser.add_argument('-v', '--verbose', action='store_true',
help='be more verbose, ineffective without -i')
parser.add_argument('-a', '--aosp', action='store_true',
help='use AOSP style instead of Google Style (4-space indentation)')
parser.add_argument('--skip-sorting-imports', action='store_true',
help='do not fix the import order')
parser.add_argument('--skip-removing-unused-imports', action='store_true',
help='do not remove ununsed imports')
parser.add_argument(
'--skip-javadoc-formatting',
action='store_true',
default=False,
help='do not reformat javadoc')
parser.add_argument('-b', '--binary', help='path to google-java-format binary')
parser.add_argument('--google-java-format-jar', metavar='ABSOLUTE_PATH', default=None,
help='use a custom google-java-format jar')
args = parser.parse_args()
# Extract changed lines for each file.
filename = None
lines_by_file = {}
for line in sys.stdin:
match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
if match:
filename = match.group(2)
if filename == None:
continue
if args.regex is not None:
if not re.match('^%s$' % args.regex, filename):
continue
else:
if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
continue
match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
if match:
start_line = int(match.group(1))
line_count = 1
if match.group(3):
line_count = int(match.group(3))
if line_count == 0:
continue
end_line = start_line + line_count - 1;
lines_by_file.setdefault(filename, []).extend(
['-lines', str(start_line) + ':' + str(end_line)])
if args.binary:
base_command = [args.binary]
elif args.google_java_format_jar:
base_command = ['java', '-jar', args.google_java_format_jar]
else:
binary = which('google-java-format') or '/usr/bin/google-java-format'
base_command = [binary]
# Reformat files containing changes in place.
for filename, lines in lines_by_file.items():
if args.i and args.verbose:
print('Formatting', filename)
command = base_command[:]
if args.i:
command.append('-i')
if args.aosp:
command.append('--aosp')
if args.skip_sorting_imports:
command.append('--skip-sorting-imports')
if args.skip_removing_unused_imports:
command.append('--skip-removing-unused-imports')
if args.skip_javadoc_formatting:
command.append('--skip-javadoc-formatting')
command.extend(lines)
command.append(filename)
p = subprocess.Popen(command, stdout=subprocess.PIPE,
stderr=None, stdin=subprocess.PIPE)
stdout, stderr = p.communicate()
if p.returncode != 0:
sys.exit(p.returncode);
if not args.i:
with open(filename) as f:
code = f.readlines()
formatted_code = io.StringIO(stdout.decode('utf-8')).readlines()
diff = difflib.unified_diff(code, formatted_code,
filename, filename,
'(before formatting)', '(after formatting)')
diff_string = ''.join(diff)
if len(diff_string) > 0:
sys.stdout.write(diff_string)
if __name__ == '__main__':
main()
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