#!/bin/bash
XDG_CACHE_HOME=${XDG_CACHE_HOME:-$HOME/.cache}
AURDEST=${AURDEST:-$XDG_CACHE_HOME/aurutils/sync}
AURVCS=${AURVCS:-.*-(cvs|svn|git|hg|bzr|darcs)$}

filter_vcs() {
	awk -v "mask=$AURVCS" '$1 ~ mask {print $1}' "$@"
}

# Note that valid PKGBUILDs cannot contain \n in pkgname.
get_latest_revision() {
	grep -Fxf - <(printf '%s\n' *) | xargs -r aur srcver
}

db_tmp=$(mktemp)
trap 'rm -rf "$db_tmp"' EXIT

# Retrieve a list of the local repository contents. The repository
# can be specified with the usual aur-repo arguments.
aur repo --list "$@" >"$db_tmp"

# Find VCS packages that are outdated according to aur-srcver.
# This checks out the latest revision for existing source directories,
# assuming the PKGBUILD has been viewed priorly.
if cd "$AURDEST"; then
	aur vercmp -p <(filter_vcs "$db_tmp" | get_latest_revision) <"$db_tmp"
fi