dev.sh

#!/usr/bin/env bash

declare -g CHECKSUM_APP
declare -g CONTAINER_APP
declare -g CONTAINER_IMAGE='pysudoers:dev'
declare -g LABEL_PREFIX='org.broadinstitute.pysudoers'
declare -g OPTS
declare -g SCRIPT_DIR
declare -ag SSH_FORWARD
declare -ga TRACK_FILES=( Containerfile poetry.lock pyproject.toml )
declare -ga SUDO
declare -ag TTY

SCRIPT_DIR="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

if hash sha256sum 2>/dev/null; then
    CHECKSUM_APP='sha256sum'
elif hash shasum 2>/dev/null; then
    CHECKSUM_APP='shasum -a 256'
elif hash md5sum 2>/dev/null; then
    CHECKSUM_APP='md5sum'
else
    echo 'Could not find a checksumming program. Exiting!'
    exit 1
fi

if hash docker 2>/dev/null; then
    CONTAINER_APP='docker'
elif hash podman 2>/dev/null; then
    CONTAINER_APP='podman'
else
    echo 'Container environment cannot be found. Exiting!'
    exit 2
fi

function build() {
    if [[ -z "$1" ]]; then
        echo 'Image name not provided to build. Exiting!'
        exit 1
    fi
    CONTAINER_IMAGE=$1

    if ! git diff --quiet; then
        echo 'Branch is dirty.  The build can only happen on an unmodified branch.'
        exit 2
    fi

    local -a labels
    for tfile in "${TRACK_FILES[@]}"; do
        label="$( $CHECKSUM_APP "$tfile" | awk -v PREFIX="$LABEL_PREFIX" '{print PREFIX"."$2"="$1}' )"
        labels+=( --label "$label" )
    done

    "${SUDO[@]}" "$CONTAINER_APP" build --pull -t "$CONTAINER_IMAGE" "${labels[@]}" .
}

if [[ "$TERM" != 'dumb' ]]; then
    TTY=( '-it' )
fi

if [[ "$( uname -s )" != 'Darwin' ]]; then
    if [[ ! -w "$DOCKER_SOCKET" ]]; then
        SUDO=( sudo )
    fi
fi

pushd "$SCRIPT_DIR" >/dev/null || exit 1
CONTAINER_ID="$( "$CONTAINER_APP" image ls -qf "reference=${CONTAINER_IMAGE}" )"
if [ -z "$CONTAINER_ID" ]; then
    build "$CONTAINER_IMAGE"
fi

rebuild='0'
for tfile in "${TRACK_FILES[@]}"; do
    current="$( "$CHECKSUM_APP" "$tfile" | cut -d' ' -f1 )"
    stored="$( "$CONTAINER_APP" image inspect --format="{{index .Config.Labels \"${LABEL_PREFIX}.${tfile}\"}}" "$CONTAINER_IMAGE" )"

    if [[ "$current" != "$stored" ]]; then
        echo "$tfile changed.  Rebuilding."
        rebuild='1'
    fi
done

if [[ "$rebuild" == "1" ]]; then
    build "$CONTAINER_IMAGE"
fi

"${SUDO[@]}" "$CONTAINER_APP" run "${TTY[@]}" --rm \
    -v "${SCRIPT_DIR}:/working" \
    "$CONTAINER_IMAGE" "$@"

popd >/dev/null || exit 1