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58 lines
1.3 KiB
Python
Executable File
58 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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Version Comparison tool for the CLI.
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Adapted from script found in anishathalye's dotfiles.
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https://github.com/anishathalye/dotfiles/blob/master/bin/vercmp
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"""
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import operator
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import sys
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from packaging import version
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str_to_operator = {
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"==": operator.eq,
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"!=": operator.ne,
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"<": operator.lt,
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"<=": operator.le,
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">": operator.gt,
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">=": operator.ge,
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}
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def vercmp(expr):
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"""Version Comparison function."""
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words = expr.split()
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comparisons = [words[i: i + 3] for i in range(0, len(words) - 2, 2)]
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for left, op_str, right in comparisons:
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compare_op = str_to_operator[op_str]
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if not compare_op(version.parse(left), version.parse(right)):
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return False
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return True
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def main():
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"""Triggers version comparison if line is provided."""
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for line in sys.stdin:
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if not vercmp(line):
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sys.exit(1)
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sys.exit(0)
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def test():
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"""Basic functionality tests."""
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assert not vercmp("1.9 >= 2.4")
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assert vercmp("2.4 >= 2.4")
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assert vercmp("2.5 >= 2.4")
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assert vercmp("3 >= 2.999")
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assert vercmp("2.9 < 2.9a")
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assert vercmp("2.9a >= 2.8")
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if __name__ == "__main__":
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if len(sys.argv) == 2 and sys.argv[1] == "test":
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test()
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else:
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main()
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