#!/bin/bash

set -e

usage() {
    echo "usage: dcp-build [-Nh] REPODIR OUTDIR"
}

rungit() {
    (
	cd "$td/repo"
	git "$@"
    ) || false
}

defdir=/srv/dcp
push=y

while [ "${1:0:1}" = - ]; do
    opt="${1:1}"
    shift
    if [ "$opt" = N ]; then
	push=n
	shift
    elif [ "$opt" = h ]; then
	usage
	exit 0
    else
	echo "dcp-build: unknown option '$opt'" >&2
	exit 1
    fi
done

if [ $# -lt 2 ]; then
    usage >&2
    exit 1
fi

repodir="$1"
outdir="$2"
shift 2
if [[ "$repodir" != */* ]]; then
    repodir="$defdir/${repodir}.git"
fi

if [ ! -d "$repodir" ]; then
    echo "dcp-build: could not find $repodir" >&2
    exit 1
fi
if [ ! -d "$outdir" ]; then
    echo "dcp-build: could not find $outdir" >&2
    exit 1
fi

td="$(mktemp -d /tmp/dcp-XXXXXX)"
exec >"$td/log" 2>"$td/err"
dcp-runenv "$repodir" "$td"

rungit tag -f lastbuild
(cd "$td"; control/build) || false
cp -a "$td/output"/* "$outdir/"

if [ "$push" = y ]; then rungit push --tags; fi

rm -rf "$td"