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"""File a cycle's build output into changelogs/.

python .github/scripts/changelog_files.py <downloaded metadata> changelogs

A build leg produces four metadata files. Three of them belong in changelogs/

and are copied there as they are: the package index

(WinPython<flavor>-64bit-<version>.md), the lock file and the requirements.

The fourth, hashes_<winpyver>.md, describes the binaries of one build rather

than the release, and stays out.

No _History.md companion is written. A history compares a release against the

one immediately before it, and that chain carries no meaning: flavors are not

stable across cycles -- one may appear while another goes away -- and people

upgrade about once a year rather than every cycle, so a diff against the

predecessor answers a question almost nobody asks. What is useful is comparing

two package indexes of the reader's own choosing, which `wppm -diff` does

against any two of the files this script files.

"""

import re

import shutil

import sys

from pathlib import Path

# Running a script puts the script's own directory on sys.path, not the

# checkout root, so wppm has to be found deliberately: this file is

# .github/scripts/changelog_files.py, hence two levels up. Without it the

# import finds whatever wppm happens to be installed, or -- as on a CI runner,

# which installs none -- nothing at all.

sys.path.insert(0, str(Path(__file__).resolve().parents[2]))

from wppm.diff import version # noqa: E402 packaging, or pip's vendored copy

# WinPythonslim-64bit-3.15.0.5b1.md -- the flavor may be empty, and the version

# may carry a release level, which is why the parser decides and not the regex

CHANGELOG = re.compile(r"^WinPython(?P<flavor>[A-Za-z0-9]*)-(?P<arch>\d+)bit-(?P<version>.+)\.md$")

def parse_changelog_name(name: str):

"""(flavor, architecture, version) for a package index, else None."""

match = CHANGELOG.match(name)

if not match:

return None

try:

version.parse(match.group("version"))

except version.InvalidVersion:

return None # anything whose tail is not a version is not an index

return match.group("flavor"), int(match.group("arch")), match.group("version")

def files_to_file(source: Path):

"""The build output that belongs in changelogs/.

The package index, the lock file and the requirements -- and so not

hashes_<winpyver>.md, which describes one build's binaries rather than the

release. It is excluded by being neither: it is not named for a version,

and it is not a pylock or a requir.

"""

for path in sorted(source.iterdir()):

if not path.is_file():

continue

if parse_changelog_name(path.name) or path.name.startswith(("pylock.", "requir.")):

yield path

def main(argv: list[str]) -> None:

if len(argv) != 3:

raise SystemExit(f"usage: {Path(argv[0]).name} <metadata dir> <changelogs dir>")

source, changelogs = Path(argv[1]), Path(argv[2])

if not source.is_dir():

raise SystemExit(f"no such directory: {source}")

if not changelogs.is_dir():

raise SystemExit(f"no such directory: {changelogs}")

filed = []

for path in files_to_file(source):

shutil.copyfile(path, changelogs / path.name)

filed.append(path.name)

if not filed:

raise SystemExit(f"{source} held no changelog, lock file or requirements")

for name in filed:

print(f"filed {name}")

indexes = sum(1 for name in filed if parse_changelog_name(name))

print(f"\n{len(filed)} file(s) filed, {indexes} package index(es)")

if __name__ == "__main__":

main(sys.argv)