#! /usr/bin/env bash
# Args: <config-file> <arch> <builder-args> [<repo>]

if [ -z "$BUILD_DIR" ]; then
    BUILD_DIR=build
fi

# Reset env
while read i
do
    unset "$i"
done < <(printenv | cut -d '=' -f 1 | grep -vE '^(PWD|PATH|HOME|BUILD_DIR)$')
printenv &&

# Build
if [ -z "$4" ]; then
    BUILD_DIR= exec flatpak-builder $3 --arch "$2" --sandbox --rebuild-on-sdk-change --bundle-sources "$BUILD_DIR" "$1"
else
    HASH="$("$(dirname "$0")/hash_modules.py" --installed "$1" "$2" | sed -n '1p')" &&
    ID="$("$(dirname "$0")/hash_modules.py" --get-id "$1" "$2" | ( IFS=/; while read a b c; do echo "$a/$b.Builds/$c"; exit 1; done ) || exit 0; exit 1 )" &&
    (
        find '.flatpak-builder/build' '.flatpak-builder/cache' -delete ||
        rm -rf ".flatpak-builder/build" '.flatpak-builder/cache'
    ) &&
    BUILD_DIR= flatpak-builder $3 --arch "$2" --keep-build-dirs --sandbox --rebuild-on-sdk-change --bundle-sources --repo "$4" -s "WB_HASH='${HASH}'" "$BUILD_DIR" "$1" &&
    echo -n "Export $ID: " &&
    ostree commit --repo "$4" --owner-uid=0 --owner-gid=0 --no-xattrs --generate-sizes --skip-if-unchanged --tree=dir=.flatpak-builder/build --branch "$ID"
fi