gig

#!/usr/bin/env bash
delete=
lang=
edit=
generate=
view=
TEMPLATE_DIR="$HOME/.GiG/GitIgnoreTemplates"
GITIGNORE=".gitignore"
CREDITS="# This gitignore is generated using https://github.com/prdpx7/GiG/"
function show_usage() 
{
    echo '
Usage: [-a] [-d] [-e] [-g] [-h] [-l LANG] [-v] [-u]

Optional Arguments:
    
-a , --all : display available gitignore template list
-d , --delete : delete default  gitignore template for given -l LANG
-e , --edit : Edit the default gitignore template for given -l LANG
-g , --generate : generate new gitignore template or append if already exist for given -l LANG
-h , --help : show this help message and exit
-l LANG, --lang LANG : Specify language(full name not just extension) to generate their respective gitignore template
-v, --view : view gitignore template for given -l LANG in less mode
-u, --update : pull recent update
Examples:
$ gig -l python -e  #edit the default python gitignore template 
$ gig -l node   -v  #view default node gitignore template
$ gig -l c++ -g     #generate c++ gitignore template in present directory(append content if already exist)    
$ gig --all
actionscript.gitignore
ada.gitignore          
android.gitignore
...
...
    '
}

function is_exist()
{
    if [ ! -f "$TEMPLATE_DIR/$lang.gitignore" ];then
        echo "Not a valid language name(should use full name): for more info try  gig --help"
        exit 1
    fi
}
function main()
{
    while [ $# -gt 0 ]; do
        case $1 in 
            -h|--help)
                show_usage
                exit
                ;;
            -l|--lang)
                lang=`echo $2 | tr "A-Z" "a-z"`
                is_exist $lang
                shift
                ;;
            -a|--all)
                ls $TEMPLATE_DIR/*.gitignore | xargs -n 1 basename
                exit 0
                ;;
            -v|--view)
                view=1
                shift
                ;;
            -e|--edit)
                edit=1
                shift
                ;;
            -g|--generate)
                generate=1
                shift
                ;;
            -d|--delete)
                delete=1
                shift
                ;;
            -u|--update)
                if [ ! -d $HOME/.GiG ];then 
                    echo "looks like you have chosen different clone path"
                    exit 1
                fi
                ~/.GiG/install.sh
                exit 0
                ;;
            -?*)
                printf 'WARNING: Unknown option (ignored): %s\n' "$1" >&2
                shift
                ;;

            *)
                shift
                ;;
        esac
    done

    is_exist $lang
    lang_path="$TEMPLATE_DIR/$lang.gitignore"
    if [ $view ];then
        less "$lang_path" ;
    elif [ $generate ];then
        cat "$lang_path" >> $GITIGNORE ;
        echo "Added gitignore attributes for $lang !!!" ;
        first_line=$(head -1 $GITIGNORE)
        if [ "$first_line" != "$CREDITS" ]; then
            sed -i "1i$CREDITS" $GITIGNORE
        fi
    elif [ $edit ];then
        $EDITOR "$lang_path" ;
    elif [ $delete ];then
        echo "Do you really want to delete $lang_path (y/n):" ;
        read ch ;
        ch=$(echo $ch | tr "A-Z" "a-z") ;
        if [ $ch = "y" ];then
            rm "$lang_path" ;
        fi
    fi
}
main "$@"