#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2026 Bryan Joshua Pedini

# Fake paru for the AUR E2E tests (tests/e2e/aur.bats installs it as /usr/local/bin/paru on the
# pacman backend): emulates paru 2.1.0 (discovery/pacman.md section 15) for su-dummy-aur, the
# foreign package of the fixture (FIXTURE_AUR=1), whose 2.0 "AUR build" is
# /srv/su-aur/su-dummy-aur-2.0-1-any.pkg.tar.zst. No network.
#   -Qua        "su-dummy-aur 1.0-1 -> 2.0-1" (+ " [ignored]" when IgnorePkg names it) while an
#               older version is installed; otherwise nothing, exit 1
#   -Sia NAME   paru's AUR record of su-dummy-aur 2.0-1 (pacman-style "Key : Value" lines)
#   -Sua [--noconfirm] [--ignore a,b]
#               installs the 2.0 package with `sudo pacman -U --noconfirm`, unless su-dummy-aur is
#               ignored or up to date; refuses to run as root like paru ("can't install AUR package
#               as root")
# Every call is appended to /tmp/su-aur-paru.log as "<user> HOME=<home> PWD=<dir> <args>"; -Sua
# also logs the installed su-dummy-a then (the repository step must have upgraded it before).
set -uo pipefail
LOG=/tmp/su-aur-paru.log
PKG=su-dummy-aur NEW=2.0-1 FILE=/srv/su-aur/su-dummy-aur-2.0-1-any.pkg.tar.zst
printf '%s HOME=%s PWD=%s %s\n' "$(id -un)" "${HOME-}" "$PWD" "$*" >>"$LOG"

installed() { pacman -Q "$PKG" 2>/dev/null | cut -d' ' -f2; }
ignored_by_conf() { pacman-conf IgnorePkg 2>/dev/null | grep -qx "$PKG"; }

case ${1:-} in
-Qua)
	v=$(installed)
	[[ -n $v && $v != "$NEW" ]] || exit 1
	if ignored_by_conf; then echo "$PKG $v -> $NEW [ignored]"; else echo "$PKG $v -> $NEW"; fi
	;;
-Sia)
	if [[ ${2:-} != "$PKG" ]]; then
		echo "error: package '${2:-}' was not found" >&2
		exit 1
	fi
	cat <<REC
Repository      : aur
Name            : $PKG
Version         : $NEW
Description     : Skeptical-updater dummy package AUR (foreign: in no repository)
URL             : https://example.invalid/su-dummy
AUR URL         : https://aur.archlinux.org/packages/$PKG
Groups          : None
Licenses        : custom
Provides        : None
Depends On      : None
Make Deps       : None
Check Deps      : None
Optional Deps   : None
Conflicts With  : None
Maintainer      : su-fixture
Votes           : 7
Popularity      : 0.01
First Submitted : Tue, 14 Nov 2023 22:13:20
Last Modified   : Tue, 14 Nov 2023 22:13:20
Out Of Date     : No

REC
	;;
-Sua)
	shift
	ign=''
	while (($#)); do
		case $1 in
		--ignore)
			ign=${2:-}
			shift
			;;
		esac
		shift
	done
	echo "  (at -Sua: $(pacman -Q su-dummy-a 2>/dev/null))" >>"$LOG"
	echo ':: Looking for devel upgrades...'
	if ((EUID == 0)); then
		echo ':: Resolving dependencies...'
		echo "error: can't install AUR package as root" >&2
		exit 1
	fi
	v=$(installed)
	if [[ ,$ign, == *,"$PKG",* ]] || ignored_by_conf; then
		echo " there is nothing to do"
		echo "warning: $PKG: ignoring package upgrade ($v => $NEW)" >&2
		exit 0
	fi
	if [[ -z $v || $v == "$NEW" ]]; then
		echo " there is nothing to do"
		exit 0
	fi
	printf '\nAur (1)           Old Version  New Version    Make Only\naur/%s  %s        %s          No\n\n' "$PKG" "$v" "$NEW"
	sudo pacman -U --noconfirm "$FILE"
	;;
*)
	echo "fake paru: unhandled: $*" >&2
	exit 99
	;;
esac