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Add an initial rewrite of updater.sh script
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Emanuele Petriglia
parent
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commit
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199
updater.sh
199
updater.sh
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#!/usr/bin/env bash
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#
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# ghacks-user.js updater for GNU/Linux and Mac.
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#
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# Copyright (C) 2018 Emanuele Petriglia <inbox@emanuelepetriglia.me>.
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# All right reserved. This file is licensed under the MIT license.
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#
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# Version: 1.4
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#
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# Please read the wiki or run 'updater.sh --help' to get informations about this
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# script.
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### ghacks-user.js updater for Mac/Linux
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## author: @overdodactyl
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## version: 1.3
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# Default values for flags.
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QUIET="false"
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VERBOSE="false"
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FORCE_VERSION="false"
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UPDATED="false"
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## DON'T GO HIGHER THAN VERSION x.9 !! ( because of ASCII comparison in check_for_update() )
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ghacksjs="https://raw.githubusercontent.com/ghacksuserjs/ghacks-user.js/master/user.js"
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updater="https://raw.githubusercontent.com/ghacksuserjs/ghacks-user.js/master/updater.sh"
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update_pref=${1:--ask}
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currdir=$(pwd)
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## get the full path of this script (readlink for Linux, greadlink for Mac with coreutils installed)
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sfp=$(readlink -f "${BASH_SOURCE[0]}" 2>/dev/null || greadlink -f "${BASH_SOURCE[0]}" 2>/dev/null)
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## fallback for Macs without coreutils
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if [ -z "$sfp" ]; then sfp=${BASH_SOURCE[0]}; fi
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## change directory to the Firefox profile directory
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cd "$(dirname "${sfp}")"
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## Used to check if a new version of updater.sh is available
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update_available="no"
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check_for_update () {
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online_version="$(curl -s ${updater} | sed -n '5 s/.*[[:blank:]]\([[:digit:]]*\.[[:digit:]]*\)/\1/p')"
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path_to_script="$(dirname "${sfp}")/updater.sh"
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current_version="$(sed -n '5 s/.*[[:blank:]]\([[:digit:]]*\.[[:digit:]]*\)/\1/p' "$path_to_script")"
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if [[ "$current_version" < "$online_version" ]]; then
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update_available="yes"
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fi
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}
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## Used to backup the current script, and download and execute the latest version of updater.sh
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update_script () {
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echo -e "This script will be backed up and the latest version of updater.sh will be executed.\n"
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mv updater.sh "updater.sh.backup.$(date +"%Y-%m-%d_%H%M")"
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curl -O ${updater} && echo -e "\nThe latest updater script has been downloaded\n"
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# make new file executable
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chmod +x updater.sh
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# execute new updater script
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./updater.sh -donotupdate
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# exit script
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# Prints a message to the standard error and exit with error code 1.
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error() {
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echo -e "$@" >&2
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exit 1
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}
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main () {
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## create backup folder if it doesn't exist
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mkdir -p userjs_backups;
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echo -e "\nThis script should be run from your Firefox profile directory.\n"
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echo -e "Updating the user.js for Firefox profile:\n$(pwd)\n"
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if [ -e user.js ]; then
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echo "Your current user.js file for this profile will be backed up and the latest ghacks version from github will take its place."
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echo -e "\nIf currently using the ghacks user.js, please compare versions:"
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echo " Available online: $(curl -s ${ghacksjs} | sed -n '4p')"
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echo " Currently using: $(sed -n '4p' user.js)"
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else
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echo "A user.js file does not exist in this profile. If you continue, the latest ghacks version from github will be downloaded."
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# Prints a message to the standard erorr without terminate execution.
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warn() {
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if [[ "$QUIET" == "false" ]]; then
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echo -e "$@" >&2
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fi
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echo -e "\nIf a user-overrides.js file exists in this profile, it will be appended to the user.js.\n"
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read -p "Continue Y/N? " -n 1 -r
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echo -e "\n\n"
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if [[ $REPLY =~ ^[Yy]$ ]]; then
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if [ -e user.js ]; then
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# backup current user.js
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bakfile="userjs_backups/user.js.backup.$(date +"%Y-%m-%d_%H%M")"
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mv user.js "${bakfile}" && echo "Your previous user.js file was backed up: ${bakfile}"
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fi
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# download latest ghacks user.js
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echo "downloading latest ghacks user.js file"
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curl -O ${ghacksjs} && echo "ghacks user.js has been downloaded"
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if [ -e user-overrides.js ]; then
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echo "user-overrides.js file found"
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cat user-overrides.js >> user.js && echo "user-overrides.js has been appended to user.js"
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fi
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else
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echo "Process aborted"
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fi
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## change directory back to the original working directory
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cd "${currdir}"
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}
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update_pref="$(echo $update_pref | tr '[A-Z]' '[a-z]')"
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if [ $update_pref = "-donotupdate" ]; then
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main
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else
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check_for_update
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if [ $update_available = "no" ]; then
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main
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else
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## there is an update available
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if [ $update_pref = "-update" ]; then
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## update without asking
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update_script
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else
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read -p "There is a newer version of updater.sh available. Download and execute? Y/N? " -n 1 -r
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echo -e "\n\n"
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if [[ $REPLY =~ ^[Yy]$ ]]; then
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update_script
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else
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main
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fi
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fi
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# Prints a message to the standard output.
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log() {
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if [[ "$VERBOSE" == "true" && "$QUIET" == "false" ]]; then
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echo -e "$@"
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fi
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fi
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}
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# Updates the installer script. It set "true" the variable UPDATED if this
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# script is succesfully updated.
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update_installer() {
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local TMPFILE="$(mktemp)"
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local UPDATER_URL="https://raw.githubusercontent.com/ghacksuserjs/ghacks-user.js/master/updater.sh"
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log "Downloading latest updater.sh script to $TMPFILE..."
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wget --quiet --output-document "$TMPFILE" "$UPDATER_URL"
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if [[ "$?" == "0" ]]; then
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log "Updater script succesfully downloaded!"
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UPDATED="true"
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else
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warn "Failed to download the updater script."
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fi
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mv "$TMPFILE" "UPDATER.SH"
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}
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# Prints to the standard output the help message.
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show_help() {
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echo "ciao"
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}
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# Prints to the standard output the version of this script.
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show_version() {
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echo "$PROGRAM version 1.4"
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}
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# Updates the user.js.
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update_userjs() {
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# Run the recenlty downloader version of this script.
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if [[ "$UPDATED" == "true" ]]; then
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source "$PROGRAM" $@
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exit 0
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fi
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}
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# Check if a program is installed. If it is not installed prints an error.
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check_utily() {
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if [[ -z $(command -v "$1") ]]; then
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error "$1 is not installed. Please install it before executing this script"
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fi
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}
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PROGRAM="${0##*/}"
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check_utily "wget"
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check_utily "mktemp"
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case "$1" in
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--update|-u) shift; update_installer "$@";;
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--force-version|-f) shift; FORCE_VERSION="yes";;
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--quiet|-q) shift; QUIET="yes";;
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--verbose) shift; VERBOSE="true";;
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--help|-h) shift; show_help;;
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--version|-v) shift; show_version;;
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esac
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update_userjs
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exit 0
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