sublime-link

#!/bin/sh

set -e
unset CDPATH
unset IFS

show_usage() {
    cat <<USAGE
Usage: $(basename $0) --build <number>
USAGE
}

extract_bz2() {
    if [ ! -f "$1" ]; then
        echo >&2 "file does not exist: $1"
        exit 1
    fi

    if [ -e "$2" ]; then
        echo >&2 "destination already exists: $2"
        exit 1
    fi

    mkdir -p "$2"

    tar -x -j --strip-components 1 -f "$1" -C "$2"
}

test "$#" = 0 && show_usage && exit 0

BUILD=
while test "$#" != 0; do
    case "$1" in
        --help|-h) show_usage; exit 0 ;;
        --build) BUILD="$2"; shift ;;
        --) shift; break ;; # standard end of options list
        -*) echo >&2 "$(basename "$0"): unknown option '$1'"; exit 1 ;;
        *) echo >&2 "$(basename "$0"): unknown argument '$1'"; exit 1 ;;
    esac
    shift
done

if test -z "$BUILD"; then
    echo >&2 "$(basename "$0"): --build <number> is required"
    exit 1
fi

# TODO auto download and verify build if it isn't already downloaded
PACKAGE_PATH="$HOME/Downloads/sublime-builds/sublime_text_3_build_${BUILD}_x64.tar.bz2"
DESTINATION_PATH="$HOME/sublime_text_${BUILD}"

echo "VERBOSE => package:      $PACKAGE_PATH"
echo "VERBOSE => destination:  $DESTINATION_PATH"

if test ! -d "$DESTINATION_PATH"; then
    if test ! -f "$PACKAGE_PATH"; then
        echo >&2 "$(basename "$0"): no build package found"
        exit 1
    fi

    echo "VERBOSE => extracting '$PACKAGE_PATH' -> '$DESTINATION_PATH' ..."
    extract_bz2 "$PACKAGE_PATH" "$DESTINATION_PATH"
fi

rm -v "$HOME/sublime_text_3"
ln -sv "sublime_text_$BUILD" "$HOME/sublime_text_3"