#!/bin/sh

# Convenience build script for w64devkit, primarily for automatic builds of
# multiple release flavors in one shot. By default it does a standard build
# at the current commit.
#
# Example, build a full release on an arbitrary commit:
#   $ ./multibuild.sh -as "$(git describe | tr v -)"

set -e
arch=
dryrun=
suffix="$(git describe --exact-match 2>/dev/null | tr v - || true)"

usage() {
    cat <<EOF
usage: multibuild.sh [-48ahn] [-s SUFFIX]
  -4         Enable x86 build
  -8         Enable x64 build
  -a         All architectures
  -h         Print this help message
  -n         Dry run, print commands but do nothing
  -s SUFFIX  Append a version suffix (default: auto from git tag)
EOF
}

while getopts 48ahns: opt; do
    case $opt in
        4) arch="$arch x86";;
        8) arch="$arch x64";;
        a) arch="x64 x86";;
        h) usage; exit 0;;
        n) dryrun=echo;;
        s) suffix="$OPTARG";;
        ?) usage >&2; exit 1;;
    esac
done
shift $((OPTIND - 1))

if [ $# -gt 0 ]; then
    printf 'multibuild.sh: Too many arguments\n' >&2
    usage >&2
    exit 1
fi

: ${arch:=x64}
tmp=
target="tmp-w64-$$"
cleanup() {
    rm -rf -- "$tmp"
    $dryrun docker rmi --no-prune $target 2>/dev/null || true
}
trap cleanup EXIT

for variant in $arch; do
    if [ -e "src/variant-$variant.patch" ]; then
        tmp=$(mktemp -d)
        $dryrun cp Dockerfile "$tmp/"
        $dryrun patch "$tmp/Dockerfile" "src/variant-$variant.patch"
        $dryrun docker build -f "$tmp/Dockerfile" -t $target .
        rm -rf -- "$tmp"
    else
        $dryrun docker build -t $target .
    fi
    out="w64devkit-$variant$suffix.7z.exe"
    if [ -n "$dryrun" ]; then
        $dryrun docker run --rm $target ">$out"
    else
        docker run --rm $target >"$out"
    fi
done