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Diffstat (limited to 'chromium/build/gn_helpers.py')
-rw-r--r-- | chromium/build/gn_helpers.py | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/chromium/build/gn_helpers.py b/chromium/build/gn_helpers.py new file mode 100644 index 00000000000..3b0647d9a5b --- /dev/null +++ b/chromium/build/gn_helpers.py @@ -0,0 +1,39 @@ +# 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): + 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 when printing to GN.") |