npm

#!/bin/sh

# This is a helper script which downloads the `node:alpine` container and runs
# `npm` commands inside of it, as an alternative to installing and running
# `npm` on the host.

set -eu

cmd_sh() {
    # Lots of cockpit developers are using toolbox, which can't recursively run
    # podman, but flatpak-spawn offers a nice workaround for that.
    if [ -f /run/.toolboxenv ]; then
        exec flatpak-spawn --host -- "$0" sh "$@"
        exit 1
    fi

    CACHE="cockpit-project-npm-cache-volume"
    IMAGE="docker.io/library/node:alpine"

    # make sure the node user can write to the cache volume
    podman run \
        --rm \
        --pull=always \
        --volume "${CACHE}":/home/node/.npm:U \
        "${IMAGE}" chown -R node:node /home/node >&2

    # do the actual work
    exec podman run \
        --log-driver='none' \
        --rm \
        --init \
        --user node \
        --workdir /home/node \
        --interactive \
        --attach stdin \
        --attach stdout \
        --attach stderr \
        --volume "${CACHE}":/home/node/.npm \
        "${IMAGE}" /bin/sh -c "$1"
}

cmd_download() {
    if [ -t 1 ]; then
        echo 'This command outputs tar to stdout.  Use `bots/npm install` instead.'
        exit 1
    fi

    cmd_sh '
        set -eux
        tee package.json >/dev/null
        npm install --ignore-scripts >&2 & wait -n    # allows the shell to catch SIGINT
        cp package.json node_modules/.package.json
        tar --directory=node_modules --create .
    '
}

cmd_install() {
    rm -rf node_modules
    mkdir node_modules
    cmd_download < package.json | tar --directory node_modules --exclude '.git*' --extract
    cp node_modules/.package-lock.json package-lock.json
}

cmd_outdated() {
    cmd_sh '
        set -eux
        tee package.json >/dev/null
        npm outdated '"$*"' & wait -n    # allows the shell to catch SIGINT
    ' < package.json
}

cmd_prune() {
    : # npm install already produces a clean result each time
}

main() {
    if [ $# = 0 ]; then
        # don't list the "private" ones
        echo 'This command requires a subcommand: install outdated sh'
        exit 1
    fi

    local fname="$(printf 'cmd_%s' "$1" | tr '-' '_')"
    if ! type -t "${fname}" | grep -q function; then
        echo "Unknown subcommand '$1'"
        exit 1
    fi

    shift
    "${fname}" "$@"
}

main "$@"