ubuntu-remaster-bbb.docker

#!/usr/bin/env bash

if [[ -t 2 ]]; then
    t_red=$'\e[31m'
    t_reset=$'\e(B\e[m'
else
    t_red=
    t_reset=
fi

bye() {
    echo "[wrapper] ${t_red}error:${t_reset} $1"
    exit 1
}

usage() {
    cat <<EOF
Pass --help option to the script:
  ubuntu-remaster-bbb.docker --script-help

Run the script:
  ubuntu-remaster-bbb.docker options -- input output

Error messages produced by this wrapper are prefixed with '[wrapper]'

EOF

    exit
}

docker_opts=(
    -it --rm --init
    -u "${SUDO_UID:-$(id -u)}:${SUDO_GID:-$(id -g)}"
)

docker_mounts=()
script_opts=()

run_it() {
    exec docker run "${docker_opts[@]}" "${docker_mounts[@]}" \
         ubuntu-remaster-bbb "${script_opts[@]}"
}

(( $# )) || usage

split=n
while (( $# )); do
    case $1 in
        --)
            split=y
            shift
            break ;;

        -h|--help)
            usage ;;

        --script-help)
            script_opts=(--help)
            run_it ;;

        *)
            script_opts+=("$1")
            shift ;;
    esac
done

[[ $split == y ]] || bye '"--" not found among args'
(( $# > 1 )) || bye 'You should provide input and output files'

readonly iso=$1
readonly iso_out=$2

test -e "$iso" || bye "'$_' does not exist"

out_dir=$(dirname "$iso_out")
test -e "$out_dir" || bye "'$_' does no exist"
test -d "$out_dir" || bye "'$_' is not a directory"

docker_mounts=( -v "$iso":/input.iso:ro -v "$out_dir":/output )
script_opts+=( /input.iso /output/"$(basename "$iso_out")" )

run_it