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# 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.
import os.path
import subprocess
import sys
_clang_format_command_path = None
_gn_command_path = None
def init(root_src_dir):
global _clang_format_command_path
global _gn_command_path
assert _clang_format_command_path is None
assert _gn_command_path is None
root_src_dir = os.path.abspath(root_src_dir)
# Determine //buildtools/<platform>/ directory
if sys.platform.startswith("linux"):
platform = "linux64"
exe_suffix = ""
elif sys.platform.startswith("darwin"):
platform = "mac"
exe_suffix = ""
elif sys.platform.startswith(("cygwin", "win")):
platform = "win"
exe_suffix = ".exe"
else:
assert False, "Unknown platform: {}".format(sys.platform)
buildtools_platform_dir = os.path.join(root_src_dir, "buildtools",
platform)
# //buildtools/<platform>/clang-format
_clang_format_command_path = os.path.join(
buildtools_platform_dir, "clang-format{}".format(exe_suffix))
# //buildtools/<platform>/gn
_gn_command_path = os.path.join(buildtools_platform_dir,
"gn{}".format(exe_suffix))
def auto_format(contents, filename):
assert isinstance(filename, str)
_, ext = os.path.splitext(filename)
if ext in (".gn", ".gni"):
return gn_format(contents, filename)
return clang_format(contents, filename)
def clang_format(contents, filename=None):
command_line = [_clang_format_command_path]
if filename is not None:
command_line.append('-assume-filename={}'.format(filename))
return _invoke_format_command(command_line, filename, contents)
def gn_format(contents, filename=None):
command_line = [_gn_command_path, "format", "--stdin"]
if filename is not None:
command_line.append('-assume-filename={}'.format(filename))
return _invoke_format_command(command_line, filename, contents)
def _invoke_format_command(command_line, filename, contents):
proc = subprocess.Popen(
command_line, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
stdout_output, stderr_output = proc.communicate(input=contents)
exit_code = proc.wait()
return StyleFormatResult(
stdout_output=stdout_output,
stderr_output=stderr_output,
exit_code=exit_code,
filename=filename)
class StyleFormatResult(object):
def __init__(self, stdout_output, stderr_output, exit_code, filename):
self._stdout_output = stdout_output
self._stderr_output = stderr_output
self._exit_code = exit_code
self._filename = filename
@property
def did_succeed(self):
return self._exit_code == 0
@property
def contents(self):
assert self.did_succeed
return self._stdout_output
@property
def error_message(self):
return self._stderr_output
@property
def filename(self):
return self._filename
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