uninstall.sh.in

#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

troubleshooting_url="https://skupper.io/install/troubleshooting.html"

@burly@

usage() {
    local error="${1:-}"

    if [ -n "${error}" ]
    then
        printf "%b %s\n\n" "$(red "ERROR:")" "${*}"
    fi

    cat <<EOF
Usage: uninstall.sh [OPTION...]

Uninstall the Skupper command-line tool

Options:
  -h, --help          Print this help text and exit
  --scheme SCHEME     Select an installation scheme (default "home")
  --interactive       Operate in interactive mode
  --verbose           Print detailed logging to the console

Schemes:
  home                Uninstall from ~/.local/bin
  opt                 Uninstall from /opt/skupper/bin
EOF

    if [ -n "${error}" ]
    then
        exit 1
    fi

    exit 0
}

require_option_arg() {
    local opt="$1"
    local optarg="$2"

    if [ -z "${optarg}" ]
    then
        usage "Option ${opt} is missing a required argument"
    fi

    case "${optarg}" in
        -*) usage "Option ${opt} is missing a required argument" ;;
        *) : ;;
    esac
}

main() {
    enable_strict_mode

    if [ -n "${DEBUG:-}" ]
    then
        enable_debug_mode
    fi

    local scheme=home
    local interactive=
    local verbose=

    while [ $# -gt 0 ]
    do
        case "$1" in
            -h|--help) usage ;;
            --scheme)
                require_option_arg "$1" "${2:-}"
                scheme="$2"
                shift
                ;;
            --interactive) interactive=1 ;;
            --verbose) verbose=1 ;;
            *) usage "Unknown option: ${1}" ;;
        esac

        shift
    done

    case "${scheme}" in
        home) local skupper_bin_dir="${TEST_INSTALL_PREFIX:-}${HOME}/.local/bin" ;;
        opt)  local skupper_bin_dir="${TEST_INSTALL_PREFIX:-}/opt/skupper/bin" ;;
        *)    usage "Unknown installation scheme: ${scheme}" ;;
    esac

    local work_dir="${TEST_INSTALL_PREFIX:-}${HOME}/.cache/skupper-install-script"
    local log_file="${work_dir}/install.log"
    local backup_dir="${work_dir}/backup"

    mkdir -p "${work_dir}"
    cd "${work_dir}"

    init_logging "${log_file}" "${verbose}"

    {
        if [ -n "${interactive}" ]
        then
            print_section "Preparing to uninstall"

            print "This script will uninstall the Skupper command currently at:"
            print
            print "    ${skupper_bin_dir}/skupper"
            print
            print "It will save a backup of the existing installation to:"
            print
            print "    ${backup_dir}"
            print
            print "Run \"uninstall.sh -h\" to see the uninstall options."
            print

            ask_to_proceed

            print
        fi

        print_section "Checking prerequisites"

        if [ ! -e "${skupper_bin_dir}/skupper" ]
        then
            fail "There is no existing installation to remove"
        fi

        check_writable_directories "${skupper_bin_dir}"

        print_result "OK"

        if [ -e "${skupper_bin_dir}/skupper" ]
        then
            print_section "Saving the existing installation to a backup"

            if [ -e "${backup_dir}" ]
            then
                mv "${backup_dir}" "${backup_dir}.$(date +%Y-%m-%d).$(random_number)"
            fi

            run mkdir -p "${backup_dir}"
            run mv "${skupper_bin_dir}/skupper" "${backup_dir}"

            print_result "OK"
        fi

        print_section "Removing the existing installation"

        if [ -e "${skupper_bin_dir}/skupper" ]
        then
            rm "${skupper_bin_dir}/skupper"
        fi

        print_result "OK"

        print_section "Summary"

        print_result "SUCCESS"

        print "The Skupper command has been uninstalled."
        print
        print "    Backup:  ${backup_dir}"
        print
        print "To install Skupper again, use:"
        print
        print "    curl https://skupper.io/install.sh | sh"
        print
    } >&6 2>&6
}

main "$@"