project_setup.sh

#!/usr/bin/env bash

######################################################
#
# https://wiki.bash-hackers.org/howto/getopts_tutorial
# https://sookocheff.com/post/bash/parsing-bash-script-arguments-with-shopts/
######################################################
function help() {
	echo -e "Project Initial Setup....\n"
    echo -e "Usage: $0 COMMAND [PARAMETERS]..."
    echo -e "\nCommands:"

    echo -e "\t add_all_required_submodules\t\tThis will add all(git-hooks, servicedefs) required submodules with specified branch"
    echo -e "\t add_submodule"
    echo -e "\t remove_submodule"
    echo -e "\t setup_git_hooks"
    echo -e "\t update_all_submodules_code\t\tThis will update all submodules code to their latest version for specified branch"

	echo -e "\nParameters:"

	echo -e "\t-n name of the submodule"
	echo -e "\t-b name of the branch"
#	echo "==============List of available submodules are...=============="
#	echo $(git submodule status | cut -d" " -f2)
#	echo "==============================================================="
	exit 1;
}

function setup_git_hooks {
	if [[ "$1" == "" ]]; then
		echo "branch name is a required arguments"
		exit 1
	fi
	gitHooksDir="git-hooks"
	git submodule add -b $1 [email protected]:roomville/"$gitHooksDir".git
	chmod -R +x "$gitHooksDir"

	# Use absolute paths while creating symbolic links
	ln -svFf "$PWD/$gitHooksDir"/post-merge "$PWD"/.git/hooks/post-merge
	ln -svFf "$PWD/$gitHooksDir"/pre-commit "$PWD"/.git/hooks/pre-commit
	ln -svFf "$PWD/$gitHooksDir"/post-commit "$PWD"/.git/hooks/post-commit
}

function add_submodule()
{
	echo "Adding submodule named $1 with branch $2"
	if [[ "$1" == "" ]] || [[ "$2" == "" ]]; then
		echo "submodule name and branch name are required arguments"
		exit 1
	fi

    git submodule add -b $2 [email protected]:roomville/$1.git
    if [ $? -ne 0 ]; then
    	echo "Looks like submodule already there, remove using remove_submodule sub-command"
    fi
}

function remove_submodule() {
	if [ "$1" == "" ]; then
		echo "submodule name is a required argument"
		exit 1
	fi

	echo "removing submodule $1 ......"
	git submodule deinit $1
	#		OR
	#git submodule deinit -f $name

	rm -rf $1
	rm -rf .git/modules/$1/

	# TODO could not find how to delete specific lines which belongs to given sub-module
	#open vi .gitmodules and remove required submodule section

	git rm --cached $1

	echo "Done."
}

function update_all_submodules_code() {
	if [ "$1" == "" ]; then
		echo "branch name is a reqruied argument"
		exit 1
	fi

    git submodule update --init --recursive
	git submodule foreach git checkout $1
	git submodule foreach git pull

	echo "Done."
}

function add_all_required_submodules() {
	add_submodule "git-hooks" $1
	add_submodule "servicedefs" $1
}

#Check the shell
if [ -z "$BASH_VERSION" ]; then
    echo -e "Error: this script requires the BASH shell!"
    exit 1
fi

let argnum=$#-$OPTIND

if [[ $argnum -lt 2 ]]; then
	help
fi

COMMAND="${*:$OPTIND:1}"
# remove the sub-command from the arguments list using shift 1 or shift
shift 1

name=""
branch=""

# In Silent Mode, that is disable the verbose error handling by preceding the whole option string with a colon (:)
while getopts ':hn:b:' opt
do
	case $opt in
		n)
			name=$OPTARG
		;;

		b)
			branch=$OPTARG
		;;

		h)
			help
		;;

		\?) # In Silent Mode, opt is set to ? if invalid option passed and $OPTARG is set to the (invalid) option character
			echo "Invalid option: -$OPTARG" >&2
		;;

		:) # In Silent Mode, opt is set to : if required argument not found and $OPTARG contains the option-character in question
			echo "Option -$OPTARG requires an argument." >&2
		;;
	esac
done

#CHECKING PARAMS VALUES
case $COMMAND in

	add_all_required_submodules)

		add_all_required_submodules $branch

    ;;

    add_submodule)

		add_submodule  $name $branch

    ;;

    remove_submodule)
    	remove_submodule  $name

    ;;

    setup_git_hooks)
    	setup_git_hooks $branch

    ;;

	update_all_submodules_code)
    	update_all_submodules_code $branch

    ;;

    *)

        if [[ $COMMAND != "" ]]; then
            echo -e "Error: Unknown sub-command: $COMMAND\n"
        else
        	echo -e "Missing sub-command\n"
        fi

    ;;
esac