idoit-hotfix

#!/bin/bash

##
## i-doit hotfix
##

##
## Copyright (C) 2018-19 synetics GmbH, <https://i-doit.com/>
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU Affero General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Affero General Public License for more details.
##
## You should have received a copy of the GNU Affero General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
##

set -euo pipefail
IFS=$'\n\t'

##
## Configuration
##

CONFIGURATION_FILE="/etc/i-doit/i-doit.sh"
HOTFIX_FILE="${1:-unknown}"

##--------------------------------------------------------------------------------------------------

function execute {
    local prefix=""
    local fileName=""

    log "Deploy a hot fix for i-doit"

    test "$(whoami)" != "$APACHE_USER" && prefix="sudo -u $APACHE_USER "

    test "$HOTFIX_FILE" = "unknown" && printUsage && exit 2
    test -r "$HOTFIX_FILE" || abort "Cannot find or read hotfix file $HOTFIX_FILE"

    fileName="$(basename "$HOTFIX_FILE")"

    eval "${prefix}cp $HOTFIX_FILE $INSTANCE_PATH" || \
        abort "Unable to copy file from $HOTFIX_FILE to $INSTANCE_PATH"

    cd "$INSTANCE_PATH" || abort "Unable to change directory"

    eval "${prefix}unzip -q -o $HOTFIX_FILE" || \
        abort "Unable to extract hotfix $fileName in $INSTANCE_PATH"

    eval "${prefix}rm $fileName" || \
        abort "Unable to remove hotfix $fileName from $INSTANCE_PATH"
}

function setup {
    test -f "$CONFIGURATION_FILE" || abort "Missing configuration file '${CONFIGURATION_FILE}'"

    # shellcheck source=/dev/null
    source "$CONFIGURATION_FILE" || abort "Unable to include configuration file"

    test -d "$INSTANCE_PATH" || abort "No i-doit instance found under '${INSTANCE_PATH}'"
}

function log {
    echo -e "$1"
}

function finish {
    log "Done. Have fun :-)"
    exit 0
}

function abort {
    echo -e "$1"  1>&2
    echo "Operation failed. Please check what is wrong and try again." 1>&2
    exit 1
}

function printUsage {
    log "Usage: ${BASH_SOURCE[0]} HOTFIX"
    log ""
    log "Example: ${BASH_SOURCE[0]} /tmp/ID-1234_ab42c23.zip"
}

##--------------------------------------------------------------------------------------------------

if [[ "${BASH_SOURCE[0]}" = "$0" ]]; then
    setup && execute && finish
fi