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