forked from boostorg/beast
61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
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from __future__ import absolute_import, division, print_function, unicode_literals
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import os
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import re
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ROOT_ENV_VARIABLE = 'BOOST_ROOT'
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MINIMUM_VERSION = 1, 55, 0
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VERSION_FILE = 'boost', 'version.hpp'
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LIBRARY_PATH_SEGMENT = 'stage', 'lib'
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VERSION_MATCHER = re.compile(r'#define\s+BOOST_VERSION\s+(\d+)')
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CANT_OPEN_VERSION_FILE_ERROR = """Unable to open boost version file %s.
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You have set the environment variable BOOST_ROOT to be %s.
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Please check to make sure that this points to a valid installation of boost."""
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CANT_UNDERSTAND_VERSION_ERROR = (
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"Didn't understand version string '%s' from file %s'")
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VERSION_TOO_OLD_ERROR = ('Your version of boost, %s, is older than the minimum '
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'required, %s.')
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def _text(major, minor, release):
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return '%d.%02d.%02d' % (major, minor, release)
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def _raw_boost_path():
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try:
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path = os.environ[ROOT_ENV_VARIABLE]
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if path:
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return os.path.normpath(path)
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except KeyError:
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pass
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raise KeyError('%s environment variable is not set.' % ROOT_ENV_VARIABLE)
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def _get_version_number(path):
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version_file = os.path.join(path, *VERSION_FILE)
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try:
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with open(version_file) as f:
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for line in f:
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match = VERSION_MATCHER.match(line)
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if match:
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version = match.group(1)
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try:
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return int(version)
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except ValueError:
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raise Exception(CANT_UNDERSTAND_VERSION_ERROR %
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(version, version_file))
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except IOError:
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raise Exception(CANT_OPEN_VERSION_FILE_ERROR % (version_file, path))
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def _validate_version(v):
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version = v // 100000, (v // 100) % 100, v % 100
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if version < MINIMUM_VERSION:
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raise Exception(VERSION_TOO_OLD_ERROR % (
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_text(*version), _text(*MINIMUM_VERSION)))
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def _boost_path():
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path = _raw_boost_path()
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_validate_version(_get_version_number(path))
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return path
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CPPPATH = _boost_path()
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LIBPATH = os.path.join(CPPPATH, *LIBRARY_PATH_SEGMENT)
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