Tarball Tree script

inspect-tarball.sh

#!/bin/bash
set -e

DEFAULT_MAX_DEPTH=4
DEFAULT_OUTPUT_PATH=./update

print_usage()
{
    echo "$0 [options] TARFILE"
    echo "options:"
    echo "  -h,--help                     print this message"
    echo "  -k,--keep                     do not remove temporary output directory"
    echo "  -m DEPTH,--max-depth DEPTH    maxiumum recursion depth (default: $DEFAULT_MAX_DEPTH)"
    echo "  -d DIR,--direcotry DIR        temporary output directory path (default: $DEFAULT_OUTPUT_PATH)"
}

extract()
{
    tarfile="$1"
    directory="${2:-${tarfile}.d}"
    maxdepth="${3:-$DEFAULT_MAX_DEPTH}"
    mkdir "$directory"
    tar -xf "$tarfile" -C "$directory"
    if [ "$maxdepth" -gt 1 ]; then
        cd "$directory"
        for nested_tarfile in $(ls ./*.tgz 2> /dev/null); do
            extract "$nested_tarfile" "${nested_tarfile}.d" $(( maxdepth - 1 ))
        done
        cd ..
    fi
}

MAXDEPTH="$DEFAULT_MAX_DEPTH"
KEEP=0
DIRECTORY="$DEFAULT_OUTPUT_PATH"

POSITIONAL=()
while [[ $# -gt 0 ]]; do
    arg="$1"
    case "$arg" in
        -h|--help)
            print_usage
            exit 1
        ;;
        -k|--keep)
            KEEP=1
            shift
        ;;
        -m|--max-depth)
            shift
            MAXDEPTH="$1"
            shift
        ;;
        -d|--directory)
            shift
            DIRECTORY="$1"
            shift
        ;;
        *)
            POSITIONAL+=("$1")
            shift
        ;;
    esac
done
set -- "${POSITIONAL[@]}"

TARFILE="$1"
extract "$TARFILE" "$DIRECTORY" "$MAXDEPTH"
tree "$DIRECTORY"
if [ "$KEEP" -eq 0 ]; then
    rm -rf update
fi