forked from mirrors/nixpkgs
90 lines
3.3 KiB
Python
90 lines
3.3 KiB
Python
import argparse
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import math
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import json
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import requests
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import sys
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from libversion import Version
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from typing import Optional
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def version_to_list(version):
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return list(map(int, version.split(".")))
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def odd_unstable(version: Version, selected):
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try:
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version = version_to_list(version.value)
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except:
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# Failing to parse as a list of numbers likely means the version contains a string tag like “beta”, therefore it is not a stable release.
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return selected != "stable"
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if len(version) < 2:
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return True
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even = version[1] % 2 == 0
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prerelease = (version[1] >= 90 and version[1] < 100) or (version[1] >= 900 and version[1] < 1000)
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stable = even and not prerelease
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if selected == "stable":
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return stable
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else:
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return True
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def tagged(version: Version, selected):
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if selected == "stable":
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return not ("alpha" in version.value or "beta" in version.value or "rc" in version.value)
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else:
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return True
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def no_policy(version: Version, selected):
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return True
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version_policies = {
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"odd-unstable": odd_unstable,
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"tagged": tagged,
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"none": no_policy,
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}
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def make_version_policy(version_predicate, selected, upper_bound: Optional[Version]):
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if not upper_bound:
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return lambda version: version_predicate(version, selected)
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else:
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return lambda version: version_predicate(version, selected) and version < upper_bound
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parser = argparse.ArgumentParser(description="Find latest version for a GNOME package by crawling their release server.")
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parser.add_argument("package-name", help="Name of the directory in https://ftp.gnome.org/pub/GNOME/sources/ containing the package.")
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parser.add_argument("version-policy", help="Policy determining which versions are considered stable. GNOME packages usually denote stability by alpha/beta/rc tag in the version. For older packages, odd minor versions are unstable but there are exceptions.", choices=version_policies.keys(), nargs="?", default="tagged")
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parser.add_argument("requested-release", help="Most of the time, we will want to update to stable version but sometimes it is useful to test.", choices=["stable", "unstable"], nargs="?", default="stable")
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parser.add_argument("--upper-bound", dest="upper-bound", help="Only look for versions older than this one (useful for pinning dependencies).")
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if __name__ == "__main__":
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args = parser.parse_args()
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package_name = getattr(args, "package-name")
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requested_release = getattr(args, "requested-release")
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upper_bound = getattr(args, "upper-bound")
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if upper_bound:
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upper_bound = Version(upper_bound)
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version_predicate = version_policies[getattr(args, "version-policy")]
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version_policy = make_version_policy(version_predicate, requested_release, upper_bound)
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# The structure of cache.json: https://gitlab.gnome.org/Infrastructure/sysadmin-bin/blob/master/ftpadmin#L762
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cache = json.loads(requests.get(f"https://ftp.gnome.org/pub/GNOME/sources/{package_name}/cache.json").text)
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if type(cache) != list or cache[0] != 4:
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print("Unknown format of cache.json file.", file=sys.stderr)
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sys.exit(1)
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versions = map(Version, cache[2][package_name])
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versions = sorted(filter(version_policy, versions))
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if len(versions) == 0:
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print("No versions matched.", file=sys.stderr)
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sys.exit(1)
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print(versions[-1].value)
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