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#!/usr/bin/env python
import argparse
import requests
import os
import subprocess
import json
import re
from bs4 import BeautifulSoup
parser = argparse.ArgumentParser(
description="Get all available versions listed for a package in a site."
)
parser.add_argument(
"--pname",
default=os.environ.get("UPDATE_NIX_PNAME"),
required="UPDATE_NIX_PNAME" not in os.environ,
help="name of the package",
)
parser.add_argument(
"--attr-path",
default=os.environ.get("UPDATE_NIX_ATTR_PATH"),
help="attribute path of the package",
)
parser.add_argument("--url", help="url of the page that lists the package versions")
parser.add_argument("--file", help="file name for writing debugging information")
if __name__ == "__main__":
args = parser.parse_args()
pname = args.pname
attr_path = args.attr_path or pname
url = args.url or json.loads(
subprocess.check_output(
[
"nix-instantiate",
"--json",
"--eval",
"-E",
f"with import ./. {{}}; dirOf (lib.head {attr_path}.src.urls)",
],
text=True,
)
)
# print a debugging message
if args.file:
with open(args.file, "a") as f:
f.write(f"# Listing versions for {pname} from {url}\n")
page = requests.get(url)
soup = BeautifulSoup(page.content, "html.parser")
links = soup.find_all("a")
for link in links:
link_url = link.get("href", None)
if link_url is not None:
match = re.fullmatch(
rf"{args.pname}-([\d.]+?(-[\d\w.-]+?)?)(\.tar)?(\.[^.]*)", link_url
)
if match:
print(match.group(1))
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