43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
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#!/usr/bin/env nix-shell
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#!nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ requests ])"
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import json
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import re
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from hashlib import sha1
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from struct import unpack
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from subprocess import run
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from requests import get
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# Fetch the latest stable release metadata from GitHub
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latestTag = get("https://api.github.com/repos/facebook/sapling/releases/latest").json()[
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"tag_name"
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]
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def nixPrefetchUrl(url):
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return run(
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["nix-prefetch-url", "--type", "sha256", url],
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check=True,
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text=True,
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capture_output=True,
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).stdout.rstrip()
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# Fetch the `setup.py` source and look for instances of assets being downloaded
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# from files.pythonhosted.org.
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setupPy = get(
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f"https://github.com/facebook/sapling/raw/{latestTag}/eden/scm/setup.py"
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).text
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foundUrls = re.findall(r'(https://files\.pythonhosted\.org/packages/[^\s]+)"', setupPy)
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dataDeps = {
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"links": [{"url": url, "sha256": nixPrefetchUrl(url)} for url in foundUrls],
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"version": latestTag,
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# Find latest's git tag which corresponds to the Sapling version. Also
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# needed is a hash of the version, so calculate that here. Taken from
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# Sapling source `$root/eden/scm/setup_with_version.py`.
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"versionHash": str(unpack(">Q", sha1(latestTag.encode("ascii")).digest()[:8])[0]),
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}
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open("deps.json", "w").write(json.dumps(dataDeps, indent=2, sort_keys=True) + "\n")
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