dart-sdk/build/gn_helpers.py
Nate Bosch 55f81f2210 Mass format python with yapf
- Add `.style.yapf` with configuration to use Google style.
- Run `yapf` on all `.py` files in this repo.
- Manually fix one trailing space in a doc string.
- Run `git cl format runtime` to satisfy presubmit.

Change-Id: I7e6bd11e91f07926b9188362599af398551eed79
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/111600
Commit-Queue: Nate Bosch <nbosch@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
2019-08-05 20:34:31 +00:00

40 lines
1.5 KiB
Python

# Copyright 2014 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.
"""Helper functions useful when writing scripts that are run from GN's
exec_script function."""
class GNException(Exception):
pass
def ToGNString(value, allow_dicts=True):
"""Prints the given value to stdout.
allow_dicts indicates if this function will allow converting dictionaries
to GN scopes. This is only possible at the top level, you can't nest a
GN scope in a list, so this should be set to False for recursive calls."""
if isinstance(value, str) or isinstance(value, unicode):
if value.find('\n') >= 0:
raise GNException("Trying to print a string with a newline in it.")
return '"' + value.replace('"', '\\"') + '"'
if isinstance(value, list):
return '[ %s ]' % ', '.join(ToGNString(v) for v in value)
if isinstance(value, dict):
if not allow_dicts:
raise GNException("Attempting to recursively print a dictionary.")
result = ""
for key in value:
if not isinstance(key, str):
raise GNException("Dictionary key is not a string.")
result += "%s = %s\n" % (key, ToGNString(value[key], False))
return result
if isinstance(value, int):
return str(value)
raise GNException("Unsupported type %s (value %s) when printing to GN." %
(type(value), value))