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import os |
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import subprocess |
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import warnings |
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from packaging.version import parse |
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def digit_version(version_str: str, length: int = 4): |
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"""Convert a version string into a tuple of integers. |
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This method is usually used for comparing two versions. For pre-release |
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versions: alpha < beta < rc. |
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Args: |
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version_str (str): The version string. |
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length (int): The maximum number of version levels. Defaults to 4. |
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Returns: |
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tuple[int]: The version info in digits (integers). |
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""" |
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assert 'parrots' not in version_str |
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version = parse(version_str) |
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assert version.release, f'failed to parse version {version_str}' |
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release = list(version.release) |
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release = release[:length] |
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if len(release) < length: |
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release = release + [0] * (length - len(release)) |
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if version.is_prerelease: |
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mapping = {'a': -3, 'b': -2, 'rc': -1} |
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val = -4 |
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if version.pre: |
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if version.pre[0] not in mapping: |
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warnings.warn(f'unknown prerelease version {version.pre[0]}, ' |
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'version checking may go wrong') |
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else: |
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val = mapping[version.pre[0]] |
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release.extend([val, version.pre[-1]]) |
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else: |
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release.extend([val, 0]) |
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elif version.is_postrelease: |
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release.extend([1, version.post]) |
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else: |
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release.extend([0, 0]) |
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return tuple(release) |
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def _minimal_ext_cmd(cmd): |
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env = {} |
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for k in ['SYSTEMROOT', 'PATH', 'HOME']: |
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v = os.environ.get(k) |
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if v is not None: |
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env[k] = v |
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env['LANGUAGE'] = 'C' |
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env['LANG'] = 'C' |
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env['LC_ALL'] = 'C' |
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out, err = subprocess.Popen( |
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cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, |
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env=env).communicate() |
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return out |
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