Stupid ADB wrapper for APK retrival

apk.sh

#!/bin/bash -e

usage() {
    echo "Usage:

    apk list
    apk path <package>
    apk fetch <package>
"
}

die() {
    echo "$@" 1>&2
    exit 1
}

case "$1" in
list)
    adb shell pm list packages | while IFS=: read -r -d $'\r\n' _ package; do
        echo $package
    done
    ;;

path)
    if [[ -z "$2" ]]; then
        usage
        die 'Which package?'
    fi
    adb shell pm path "$2" | while IFS=: read -r -d $'\r\n' _ path; do
        echo $path
    done
    ;;

fetch)
    if [[ -z "$2" ]]; then
        usage
        die 'Which package?'
    fi
    adb pull "$("$0" path "$2")"
    ;;

'')
    usage
    die 'Which command?'
    ;;

*)
    usage
    die "Invalid command '$1'"
    ;;
esac