git-ignore-add

#!/bin/sh
#
# Copyright (c) 2015-2016
# Author: Victor Arribas <v.arribas.urjc@gmail.com>
# License: GPLv3 <http://www.gnu.org/licenses/gpl-3.0.html>
#
# Usage:
# git ignore-add C++

set -e

usage(){
cat<<EOF
git-ignore-add
Copyright (c) 2015-2016, Victor Arribas <v.arribas.urjc@gmail.com>

Append complex ignore rules to .gitignore by using GitHub's predefined
ignore files.
You can see a list of common ignore files at:
  https://github.com/github/gitignore

Usage: git ignore-add <template>
Examples:
  git ignore-add C++
  git ignore-add Global/Eclipse

EOF
}

GitHub_Database=https://raw.githubusercontent.com/github/gitignore/master

get_from_internet(){
	if wget -q --spider $1; then
	        echo "# $1"
	        wget -q -O- $1
	        echo
	        echo
	else
		echo "Error: Requested file do not exists (file=$1)">&2
		exit 1
	fi
}

main(){
	if [ -z "$1" ] || [ "--help" = "$1" ]; then
		usage
		exit 1
	fi

	filename=${GitHub_Database}/${1}.gitignore
	get_from_internet "$filename" >> .gitignore
}


main $@