depot/third_party/nixpkgs/pkgs/common-updater/scripts/list-archive-two-levels-versions
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GitOrigin-RevId: 062a0c5437b68f950b081bbfc8a699d57a4ee026
2022-03-05 17:20:37 +01:00

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#!/usr/bin/env bash
# lists all available versions listed for a package in a site (http)
archive="" # archive url
pname="" # package name
file="" # file for writing debugging information
while (( $# > 0 )); do
flag="$1"
shift 1
case "$flag" in
--url=*)
archive="${flag#*=}"
;;
--pname=*)
pname="${flag#*=}"
;;
--file=*)
file="${flag#*=}"
;;
*)
echo "$0: unknown option ${flag}"
exit 1
;;
esac
done
# by default set url to the base dir of the first url in src.urls
if [[ -z "$archive" ]]; then
archive="$(nix-instantiate $systemArg --eval -E \
"with import ./. {}; dirOf (dirOf (lib.head $UPDATE_NIX_ATTR_PATH.src.urls))" \
| tr -d '"')"
fi
if [[ -z "$pname" ]]; then
pname="$UPDATE_NIX_ATTR_PATH"
fi
# print a debugging message
if [[ -n "$file" ]]; then
echo "# Listing versions for '$pname' at $archive" >> $file
fi
# list all major-minor versions from archive
tags1=$(curl -sS "$archive/")
tags1=$(echo "$tags1" | sed -rne 's,^<a href="([0-9]+\.[0-9]+)/">.*,\1,p')
# print available versions
for tag in $tags1; do
tags2=$(curl -sS "$archive/$tag/")
tags2=$(echo "$tags2" | sed -rne "s,^<a href=\"$pname-([0-9.]+)\\.[^0-9].*\">.*,\\1,p")
echo "$tags2"
done