#!/usr/bin/env bash
# Installs system-level config that stow can't manage (needs root).
set -euo pipefail

repo="$(cd "$(dirname "$0")" && pwd)"

# pacman: shared [options] snippet
sudo install -m644 "$repo/pacman/options.conf" /etc/pacman.d/options.conf
# The Include goes at the end of [options] (just before the first repo section,
# commented or not), so later-wins options like ParallelDownloads override
# pacman.conf's own defaults. Any old copy (e.g. straight after [options]) is
# removed first, so re-running this also moves it into place.
include='Include = /etc/pacman.d/options.conf'
tmp="$(mktemp)"
awk -v inc="$include" '
    $0 == inc { next }
    seen && !done && /^#?\[/ { print inc; print ""; done = 1 }
    /^\[options\]/ { seen = 1 }
    { print }
' /etc/pacman.conf >"$tmp"
if ! cmp -s "$tmp" /etc/pacman.conf; then
    sudo install -m644 "$tmp" /etc/pacman.conf
fi
rm -f "$tmp"