mirror of
https://github.com/nix-community/emacs-overlay.git
synced 2025-12-06 02:40:25 -08:00
6429ee53a1
So that we can use https://packaging.pypa.io/en/latest/version.html to parse/sort version numbers correctly for -rc releases.
72 lines
1.8 KiB
Python
72 lines
1.8 KiB
Python
from packaging.version import Version, InvalidVersion
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import subprocess
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import json
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# (Ab)use Python's PEP-440 version parsing for sorting Emacs versions.
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# Emacs versions aren't exactly PEP-440, but `git ls-remote`'s sort function does not support -rc
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# suffixes and neither does GNU sort.
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# Meaning that older -rc releases may be prefered to a later stable release.
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TAG_PREAMBLE = "refs/tags/emacs-"
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def main():
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proc = subprocess.run(
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[
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"git",
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"ls-remote",
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"--tags",
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"--refs",
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"https://git.savannah.gnu.org/git/emacs.git",
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"emacs-[1-9]*",
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],
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stdout=subprocess.PIPE,
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check=True,
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)
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tags: list[str] = []
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for line in proc.stdout.decode().splitlines():
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_commit, ref = line.split("\t")
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if not ref.startswith(TAG_PREAMBLE):
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continue
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tag = ref[len(TAG_PREAMBLE) :]
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# Skip unparseable versions
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try:
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Version(tag)
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except InvalidVersion:
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pass
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else:
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tags.append(tag)
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latest_version = sorted(tags, key=lambda tag: Version(tag))[-1]
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latest_tag = f"emacs-{latest_version}"
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proc = subprocess.run(
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[
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"nix-prefetch-url",
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"--unpack",
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f"https://git.savannah.gnu.org/cgit/emacs.git/snapshot/{latest_tag}.tar.gz",
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],
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stdout=subprocess.PIPE,
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check=True,
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)
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digest = proc.stdout.decode().strip()
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with open("./emacs-unstable.json", "w") as fp:
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json.dump(
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{
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"type": "savannah",
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"repo": "emacs",
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"rev": latest_tag,
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"sha256": digest,
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"version": latest_version,
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},
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fp,
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)
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fp.write("\n")
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if __name__ == "__main__":
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main()
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