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Side by Side Diff: tools/gn_helpers.py

Issue 690923003: Adds GN build files for building in GN based projects. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 1 month ago
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1 # Copyright 2014 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
4
5 """Helper functions useful when writing scripts that are run from GN's
6 exec_script function."""
7
8 class GNException(Exception):
9 pass
10
11
12 def ToGNString(value, allow_dicts = True):
13 """Prints the given value to stdout.
14
15 allow_dicts indicates if this function will allow converting dictionaries
16 to GN scopes. This is only possible at the top level, you can't nest a
17 GN scope in a list, so this should be set to False for recursive calls."""
18 if isinstance(value, str):
19 if value.find('\n') >= 0:
20 raise GNException("Trying to print a string with a newline in it.")
21 return '"' + value.replace('"', '\\"') + '"'
22
23 if isinstance(value, list):
24 return '[ %s ]' % ', '.join(ToGNString(v) for v in value)
25
26 if isinstance(value, dict):
27 if not allow_dicts:
28 raise GNException("Attempting to recursively print a dictionary.")
29 result = ""
30 for key in value:
31 if not isinstance(key, str):
32 raise GNException("Dictionary key is not a string.")
33 result += "%s = %s\n" % (key, ToGNString(value[key], False))
34 return result
35
36 if isinstance(value, int):
37 return str(value)
38
39 raise GNException("Unsupported type when printing to GN.")
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