blob: adabd7940989669f831cacc649870f086880af61 [file] [log] [blame]
# 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.
import argparse
import os
import subprocess
import sys
from css_generator import CSSStyleGenerator
def BuildGrepQuery(deleted_names):
# Query is built as \--var-1|--var-2|... The first backslash is necessary to
# prevent --var-1 from being read as an argument. The pipes make a big OR
# query.
return '\\' + '|'.join(deleted_names)
def RunGit(command):
"""Run a git subcommand, returning its output."""
command = ['git'] + command
proc = subprocess.Popen(command, stdout=subprocess.PIPE)
out = proc.communicate()[0].strip()
return out
def FindDeletedCSSVariables(input_api, output_api, input_file_filter):
files = input_api.AffectedFiles(
file_filter=lambda f: input_api.FilterSourceFile(
f, files_to_check=input_file_filter))
def get_css_var_names_for_contents(contents_function):
style_generator = CSSStyleGenerator()
for f in files:
file_contents = contents_function(f)
if len(file_contents) == 0:
return style_generator.GetCSSVarNames()
old_names = get_css_var_names_for_contents(lambda f: f.OldContents())
new_names = get_css_var_names_for_contents(lambda f: f.NewContents())
deleted_names = old_names.difference(new_names)
if not deleted_names:
return []
# Use --full-name and -n for formatting, -E for extended regexp, and :/
# as pathspec for grepping across entire repository (assumes git > 1.9.1)
problems = RunGit([
'grep', '--full-name', '-En',
BuildGrepQuery(deleted_names), '--', ':/'
if not problems:
return []
return [
'style_variable_generator variables were deleted but usages of ' +
'generated CSS variables were found in the codebase:',