#!/bin/sh
# vim: set ts=4 et:

export PACKER=${PACKER:-packer}

cd build || exit 1

# we need a profile, at least
if [ $# -eq 0 ]; then
    echo "Usage: $(basename "$0") <profile> [ <build> ... ]" >&2
    exit 1
fi

PROFILE=$1; shift

# no build(s) specified?  do all the builds!
[ $# -gt 0 ] && BUILDS="$*" || BUILDS=$(ls "profile/$PROFILE")

for BUILD in $BUILDS
do
    printf "\n*** $BUILD ***\n\n"

    BUILD_DIR="profile/$PROFILE/$BUILD"

    # get version, release, and arch
    eval "$(
        grep -E '"(version|release|arch)"' "$BUILD_DIR/vars.json" | \
            sed -e 's/[ ",]//g' -e 's/:/=/g'
    )"

    if [ "$version" != 'edge' ]; then
        # get current Alpine release for this version
        alpine_release=$(
            curl -s "http://dl-cdn.alpinelinux.org/alpine/v$version/main/$arch/" | \
                grep '"alpine-base-' | cut -d'"' -f2 | cut -d- -f3
        )
        # update core version profile's release if necessary
        if [ "$alpine_release" != "$release" ]; then
            printf "=== New release ($alpine_release) detected! ===\n\n"
            sed -i '' -e "s/$release/$alpine_release/" "../profiles/version/$version"
            ./resolve-profile.py "$PROFILE"
            # NOTE: this does NOT update 'revision', it's at target profile/build level
        fi
    fi

    # execute packer, capture output and exit code
    (
        "$PACKER" build -var-file="$BUILD_DIR/vars.json" packer.json
        echo $? >"$BUILD_DIR/exit"
    ) | tee "$BUILD_DIR/output"
    EXIT=$(cat "$BUILD_DIR/exit")

    if [ "$EXIT" = "0" ]; then
        ./update-release.py "$PROFILE" "$BUILD"
    else
        # unless AMI revision already exists, exit
        grep -q 'is used by an existing AMI' "$BUILD_DIR/output" || exit "$EXIT"
    fi
done

# TODO?  if PROFILE = alpine-amis then prune?, gen-releases?