#!/bin/bash # Author: Alexander Epstein https://github.com/alexanderepstein currentVersion="1.11.1" 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 fetch &>/dev/null ; then configuredClient="fetch" else echo "Error: This tool reqires either curl, wget, or fetch to be installed." 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- "$@";; fetch) fetch -o "...";; esac } checkInternet() { echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1 # query google with a get request if [ $? -eq 0 ]; then #check if the output is 0, if so no errors have occured and we have connected to google successfully return 0 else echo "Error: no active internet connection" >&2 #sent to stderr return 1 fi } update() { # Author: Alexander Epstein https://github.com/alexanderepstein # Update utility version 1.2.0 # To test the tool enter in the defualt values that are in the examples for each variable repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one latestVersion=$(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" == "Y" || "$answer" == "y" ]] ;then cd ~ || { echo 'Update Failed' ; exit 1 ; } if [[ -d ~/$repositoryName ]]; then rm -r -f $repositoryName || { echo "Permissions Error: try running the update as sudo"; exit 1; } ; fi git clone "https://github.com/$githubUserName/$repositoryName" || { echo "Couldn't download latest version" ; exit 1; } 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() { echo "Cheat" echo "Description: Cheatsheets for quick information about multiple programming languages along with terminal commands" echo "Usage: cheat [flags] [command] or cheat [flags] [programming language] [subject]" echo " -s Does a search for last argument rather than looking for exact match" echo " -i Case insensitive search" echo " -b Word boundaries in search" echo " -r Recursive search" echo " -u Update Bash-Snippet Tools" echo " -h Show the help" echo " -v Get the tool version" echo "Special Pages:" echo " hello Describes building the hello world program written in the language" echo " list This lists all cheatsheets related to previous arg if none it lists all cheatsheets" echo " learn Shows a learn-x-in-minutes language cheat sheet perfect for getting started with the language" echo " 1line A collection of one-liners in this language" echo " weirdness A collection of examples of weird things in this language" echo "Examples:" echo " cheat rust hello" echo " cheat -r -b -i go" echo " cheat julia Functions" echo " cheat -i go operators" } getCheatSheet() { if [[ $# == 1 ]]; then if [[ $search == "1" ]];then link=cheat.sh/~$1 else link=cheat.sh/$1 fi else link=cheat.sh/$1 fi if [[ $# == 2 ]];then if [[ $search == "1" ]];then link+=/~$2 ## add this to end of link where ~ indicates search else link+=/$2 ## add this to end of link fi fi if [[ $insensitive != "" || $recursive != "" || $boundry != "" ]];then link+=/$boundry$insensitive$recursive; fi ## add this to the end of the link as flags httpGet $link } ### This function just wraps some of the special pages provided by cheat.sh checkSpecialPage() { temp=$1 if [[ $1 == "list" ]];then temp=":list" elif [[ $1 == "learn" ]];then temp=":list" elif [[ $1 == "styles" ]];then temp=":styles" fi if [[ $2 == "1" ]];then arg1=$temp else arg2=$temp fi } getConfiguredClient || exit 1 checkInternet || exit 1 while getopts "ribuvhis" opt; do case $opt in \?) echo "Invalid option: -$OPTARG" >&2 exit 1 ;; h) usage exit 0 ;; v) echo "Version $currentVersion" exit 0 ;; u) update exit 0 ;; i) insensitive="i" search="1" ;; b) boundry="b" search="1" ;; r) recursive="r" search="1" ;; s) search="1" ;; :) echo "Option -$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 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 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