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28c784d87b
The current script stores some environment variable values as GN declarations. It replaces `"` inside the value with `\"` because it creates a `"`-delimited string, but it doesn't replace `\` with `\\` as it rightly should to preserve the meaning of the original string. That affects **Windows paths**. If your path ends in `\`, the created "string literal" will end (or rather, not end) with `\"` and not be valid. Similarly if it contains `\"` originally, it will become `\\"` and end the string early. It's easy to have a path ending in something like `C:\something\something\`, and you can't compile Dart if you have that. Change-Id: Iaa3cdf0c8113fe2f09e7eb3ac7435bf770d8b478 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/200641 Reviewed-by: Alexander Thomas <athom@google.com> Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Helper functions useful when writing scripts that are run from GN's
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exec_script function."""
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import sys
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class GNException(Exception):
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pass
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# Computes ASCII code of an element of encoded Python 2 str / Python 3 bytes.
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_Ord = ord if sys.version_info.major < 3 else lambda c: c
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def _TranslateToGnChars(s):
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for decoded_ch in s.encode('utf-8'): # str in Python 2, bytes in Python 3.
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code = _Ord(decoded_ch) # int
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if code in (34, 36, 92): # For '"', '$', or '\\'.
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yield '\\' + chr(code)
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elif 32 <= code < 127:
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yield chr(code)
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else:
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yield '$0x%02X' % code
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def ToGNString(value, allow_dicts=True):
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"""Returns a stringified GN equivalent of a Python value.
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allow_dicts indicates if this function will allow converting dictionaries
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to GN scopes. This is only possible at the top level, you can't nest a
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GN scope in a list, so this should be set to False for recursive calls."""
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if isinstance(value, str) or isinstance(value, unicode):
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if value.find('\n') >= 0:
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raise GNException("Trying to print a string with a newline in it.")
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return '"' + ''.join(_TranslateToGnChars(value)) + '"'
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if isinstance(value, list):
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return '[ %s ]' % ', '.join(ToGNString(v, False) for v in value)
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if isinstance(value, dict):
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if not allow_dicts:
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raise GNException("Attempting to recursively print a dictionary.")
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result = ""
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for key in value:
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if not isinstance(key, str):
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raise GNException("Dictionary key is not a string.")
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result += "%s = %s\n" % (key, ToGNString(value[key], False))
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return result
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if isinstance(value, int):
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return str(value)
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raise GNException("Unsupported type %s (value %s) when printing to GN." %
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(type(value), value))
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