bin/homebrew at master · clormor/bin · GitHub

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#!/bin/bash -e


DUMP_FILE="${HOME}/.brewfile"


function abort {
    echo "$1"
    exit 1
}

function show_help {
    echo "Usage: $(basename $0) -[bhilrud]" >&2
    echo -e "\t-b: Backup current homebrew environment" >&2
    echo -e "\t-r: Restore homebrew environment from backup" >&2
    echo -e "\t-l: List the currently installed brews/casks" >&2
    echo -e "\t-i: Install homebrew" >&2
    echo -e "\t-u: Update homebrew and upgrade packages" >&2
    echo -e "\t-d: Uninstall homebrew" >&2
    echo -e "\t-h: Print this help message" >&2
}

function backup {
    brew bundle dump --force --file=$DUMP_FILE
    echo "Homebrew backup file created at $DUMP_FILE"
}

function restore {
    brew bundle --file=$DUMP_FILE
    echo "Homebrew restored from file $DUMP_FILE"
}

function list {
	cat $DUMP_FILE
}

function perform_uninstall {
    /usr/bin/which -s git || abort "brew install git first!"
    test -d /usr/local/.git || abort "brew update first!"

    cd `brew --prefix`
    git checkout master
    git ls-files -z | pbcopy
    rm -rf Cellar
    bin/brew prune
    pbpaste | xargs -0 rm
    rm -r Library/Homebrew Library/Aliases Library/Formula Library/Contributions
    test -d Library/LinkedKegs && rm -r Library/LinkedKegs
    rmdir -p bin Library share/man/man1 2> /dev/null
    rm -rf .git
    rm -rf ~/Library/Caches/Homebrew
    rm -rf ~/Library/Logs/Homebrew
    rm -rf /Library/Caches/Homebrew
}

function check_uninstall {
    read -p "Are you sure you want to uninstall homebrew ("yes")? " REPLY
    echo

    if [[ $REPLY =~ ^yes$ ]]
    then
        perform_uninstall
    else
        echo "Aborting"
    fi
}

function install {
    # see https://brew.sh/
    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
}

function update_upgrade {
    # do not abort script if palantir casks are installed and not on VPN
    set +e
    brew update
    set -e

    brew upgrade `brew outdated`
}

# show help if no args specified
if [ $# -lt 1 ]
then
    show_help && exit
fi

# process args
while [[ "$1" =~ ^- && ! "$1" == "--" ]];
do
    case $1 in
        -b | --backup )
            backup && exit
            ;;
        -r | --restore )
            shift
            restore $1 && exit
            ;;
        -i | --install )
            install && exit
            ;;
        -l | --list )
            list && exit
            ;;
        -h | --help )
            show_help && exit
            ;;
        -u | --upgrade )
            update_upgrade && exit
            ;;
        -d | --delete )
            check_uninstall && exit
            ;;
        *)
            show_help && abort "Unrecognized option: $1"
            ;;
    esac
    shift
done
if [[ "$1" == '--' ]]; then shift; fi