#!/usr/bin/env bash # Author: Alexander Epstein https://github.com/alexanderepstein currentVersion="1.22.1" configuredClient="" ## rest of these variables are search flags search="0" insensitive="" recursive="" boundry="" ## This function determines which http get tool the system has installed and returns an error if there isnt one getConfiguredClient() { if command -v curl &>/dev/null; then configuredClient="curl" elif command -v wget &>/dev/null; then configuredClient="wget" elif command -v http &>/dev/null; then configuredClient="httpie" elif command -v fetch &>/dev/null; then configuredClient="fetch" else echo "Error: This tool reqires either curl, wget, httpie or fetch to be installed." >&2 return 1 fi } ## Allows to call the users configured client without if statements everywhere httpGet() { case "$configuredClient" in curl) curl -A curl -s "$@" ;; wget) wget -qO- "$@" ;; httpie) http -b GET "$@" ;; fetch) fetch -q "$@" ;; esac } checkInternet() { httpGet github.com > /dev/null 2>&1 || { echo "Error: no active internet connection" >&2; return 1; } # query github with a get request } update() { # Author: Alexander Epstein https://github.com/alexanderepstein # Update utility version 2.2.0 # To test the tool enter in the defualt values that are in the examples for each variable repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one latestVersion=$(httpGet https://api.github.com/repos/$githubUserName/$repositoryName/tags | grep -Eo '"name":.*?[^\\]",'| head -1 | grep -Eo "[0-9.]+" ) #always grabs the tag without the v option if [[ $currentVersion == "" || $repositoryName == "" || $githubUserName == "" || $nameOfInstallFile == "" ]]; then echo "Error: update utility has not been configured correctly." >&2 exit 1 elif [[ $latestVersion == "" ]]; then echo "Error: no active internet connection" >&2 exit 1 else if [[ "$latestVersion" != "$currentVersion" ]]; then echo "Version $latestVersion available" echo -n "Do you wish to update $repositoryName [Y/n]: " read -r answer if [[ "$answer" == [Yy] ]]; then cd ~ || { echo 'Update Failed'; exit 1; } if [[ -d ~/$repositoryName ]]; then rm -r -f $repositoryName || { echo "Permissions Error: try running the update as sudo"; exit 1; } ; fi echo -n "Downloading latest version of: $repositoryName." git clone -q "https://github.com/$githubUserName/$repositoryName" && touch .BSnippetsHiddenFile || { echo "Failure!"; exit 1; } & while [ ! -f .BSnippetsHiddenFile ]; do { echo -n "."; sleep 2; };done rm -f .BSnippetsHiddenFile echo "Success!" cd $repositoryName || { echo 'Update Failed'; exit 1; } git checkout "v$latestVersion" 2> /dev/null || git checkout "$latestVersion" 2> /dev/null || echo "Couldn't git checkout to stable release, updating to latest commit." chmod a+x install.sh #this might be necessary in your case but wasnt in mine. ./$nameOfInstallFile "update" || exit 1 cd .. rm -r -f $repositoryName || { echo "Permissions Error: update succesfull but cannot delete temp files located at ~/$repositoryName delete this directory with sudo"; exit 1; } else exit 1 fi else echo "$repositoryName is already the latest version" fi fi } usage() { cat <&2 exit 1 ;; h) usage exit 0 ;; v) echo "Version $currentVersion" exit 0 ;; u) checkInternet || exit 1 update exit 0 ;; i) insensitive="i" search="1" ;; b) boundry="b" search="1" ;; r) recursive="r" search="1" ;; s) search="1" ;; :) echo "Option -$OPTARG requires an argument." >&2 exit 1 ;; esac done ### This functions sets arg 1 and arg 2 to be unqique items after the options for arg; do if [[ $arg != "-r" && $arg != "-s" && $arg != "-b" && $arg != "-i" ]]; then if [ -z ${arg1+x} ]; then arg1=$arg fi if [ ! -z ${arg1+x} ]; then arg2=$arg fi fi done ## check for special pages before moving on checkSpecialPage $arg1 1 checkSpecialPage $arg2 2 if [[ $# == 0 ]]; then usage exit 0 elif [[ $1 == "update" ]]; then checkInternet || exit 1 update exit 0 elif [[ $1 == "help" || $1 == ":help" ]]; then ## shows the help and prevents the user from seeing cheat.sh/:help usage exit 0 else checkInternet || exit 1 if [[ $arg1 != $arg2 ]]; then ## if they equal each other that means there was no arg 2 supplied getCheatSheet $arg1 $arg2 exit 0 else getCheatSheet $arg1 exit 0 fi exit 0 fi