Does the git pull of all subdirectories

auto_sync_git.sh

#!/bin/bash

# This script syncs (i.e. makes git pull) on a specified directory or, se no
# parameter was specified, in all the subdirectories that are git projects.
#
# Usage:
# ./auto_sync_git.sh directory_of_my_project
# ./auto_sync_git.sh

# An alias to the git binary
GIT=$(which git)

# This function does the git pull
function make_pull {
	directory="$1"; shift
	cd $directory

	# if the current dir is a git repository
	# http://stackoverflow.com/questions/2180270/check-if-current-directory-is-a-git-repository
	if [[ -d ".git" || $($GIT rev-parse --git-dir > /dev/null 2>&1) ]]; then
		echo "Pulling $(pwd)"
		$GIT pull
		if [[ $? -eq 0 ]]; then
			echo 'SUCCESS!'
		else
			echo 'FAILURE!'
		fi
		echo
	fi

	cd - > /dev/null
}

# The "main" function
function main {
	if [[ -d "$1" ]]; then
		make_pull "$1"
	else
		echo "Pulling all the subdirectories!"
		for directory in $(find . -maxdepth 1 -type d); do
			if [[ $directory != '.' && $directory != '..' ]]; then
				make_pull $directory
			fi
		done
	fi
}

# Invokes the main function and pass all script parameters to it
main $@