git-cinnabar

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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import os
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import subprocess
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def build_commit(head="HEAD"):
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    return subprocess.check_output(
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        [
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            "git",
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            "-C",
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            os.path.join(os.path.dirname(__file__), ".."),
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            "rev-parse",
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            "--verify",
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            head,
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        ],
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        text=True,
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        stderr=open(os.devnull, "wb"),
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    ).strip()
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