blob: 65bfbf5a3a15bb1febf735c2c5cf3fe376f60832 [file] [log] [blame]
# Copyright 2019 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.
"""Presubmit script for Chromium Infra JS resources."""
import os
import subprocess
def RunNode(infra_root, cmd_parts, stdout=None):
"""Runs node from CIPD package under infra repo."""
# Gets the node path from CIPD which is setup when infra repo is
# checked out.
cipd_node = os.path.join(infra_root, 'cipd', 'bin', 'node')
process = subprocess.Popen(
[cipd_node] + cmd_parts, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = process.communicate()
if stderr:
raise RuntimeError('%s failed: %s' % (
' '.join([cipd_node] + cmd_parts), stderr))
return stdout
def NPMInstall(infra_root):
"""Runs node and install packages."""
cipd_npm = os.path.join(
infra_root, 'cipd', 'lib', 'node_modules', 'npm', 'bin', 'npm-cli.js')
return RunNode(infra_root, [cipd_npm, 'install'])
class JSChecker(object):
def __init__(self, input_api, output_api, file_filter=None):
self.input_api = input_api
self.output_api = output_api
self.file_filter = file_filter
def _PathInNodeModules(self, *args):
"""Returns the path of the executable in node module."""
node_module = self.input_api.os_path.join(
self.input_api.PresubmitLocalPath(), 'node_modules')
return self.input_api.os_path.join(node_module, *args)
def RunESLint(self, args=None):
infra_root = self.input_api.os_path.dirname(
eslint_path = self._PathInNodeModules('eslint', 'bin', 'eslint')
# Runs ESLint on modified files.
return RunNode(infra_root, [eslint_path] + args)
def RunESLintChecks(
self, affected_js_files, style='unix', only_changed_lines=True):
"""Runs lint checks using ESLint.
The ESLint rules being applied are defined in the
.eslintrc.json configuration file.
# Extract paths to be passed to ESLint.
affected_js_files_paths = []
presubmit_path = self.input_api.PresubmitLocalPath()
changed_lines = []
for f in affected_js_files:
self.input_api.os_path.relpath(f.AbsoluteLocalPath(), presubmit_path))
args = ['--no-color', '--format', style,
'--ignore-pattern', '\'!.eslintrc.json\'']
args += affected_js_files_paths
output = self.RunESLint(args=args)
if only_changed_lines:
# Filter ESList errors for only modified lines.
output = self.FilterESLintForChangedLines(output, changed_lines)
if not output:
return []
output = 'ESLint (%s files)\n%s' % (len(affected_js_files_paths), output)
return [self.output_api.PresubmitPromptWarning(output)]
def GetChangedLines(self, affect_file_obj):
"""Gets a list of string to filter from ESLint output.
This list contains string in the format of <filename>:<line_number>
and is matched with ESList output to filter errors.
absolute_path = affect_file_obj.AbsoluteLocalPath()
return ['%s:%s' % (absolute_path, line[0])
for line in affect_file_obj.ChangedContents()]
def FilterESLintForChangedLines(self, es_output, lines_to_filter):
"""Returned the filtered errors for changed lines."""
filter_output = [es_line for es_line in es_output.split('\n') if any(
line in es_line for line in lines_to_filter)]
return '\n'.join(filter_output)
def RunChecks(self):
"""Checks for violations of the JavaScript style guide.
results = []
affected_files = self.input_api.AffectedFiles(
file_filter=self.file_filter, include_deletes=False)
affected_js_files = filter(
lambda f: f.LocalPath().endswith('.js'), affected_files)
if affected_js_files:
'Running appengine eslint on %d JS file(s)', len(affected_js_files))
results += self.RunESLintChecks(affected_js_files)
if results:
'See the JavaScript style guide at'))
return results