#!/bin/bash

#
# checkout.sh
#
# Copyright (c) 2010-2012 John Willinsky
# Distributed under the GNU GPL v2. For full terms see the file docs/COPYING.
#
# Script to check and minimize JavaScript for distribution.
#
# Usage:
# checkout.sh [options] [username] [application] [directory]
#
# Options:
# -t	Indicates that the application is being checked out by a team member
# 	(i.e. someone with commit priveleges to the pkp repositories).
#
# Parameters:
# [username]	The username to use in setting up interoperation with github.
# 		Branches should already be created on github.com for the
# 		application in question and the lib-pkp submodule that it uses.
# [application]	The name of the application to check out (ojs, ocs, ohs, or
# 		harvester).
# [directory]	The directory into which to check out the application.

# Fail immediately on error return
set -e

### Defaults ###
CORE_TEAM=0

### Command Line Options ###

while getopts ":t" opt; do
	case $opt in
		t)
			CORE_TEAM=1
			;;
	esac
done
shift $((OPTIND-1))

GITHUB_USERNAME=$1
APPLICATION=$2
CHECKOUT_DIR=$3

# Validate parameters
if [ \( "$APPLICATION" != "ojs" \) -a \( "$APPLICATION" != "ocs" \)  -a \( "$APPLICATION" != "omp" \) -a \( "$APPLICATION" != "harvester" \) ]; then
	echo "Invalid application \"$APPLICATION\" specified!"
	exit -1
fi

if [ "$GITHUB_USERNAME" == "" ]; then
	echo "Required github.com username not specified!"
	exit -1
fi

if [ \( "$CHECKOUT_DIR" == "" \) -o \( -e "$CHECKOUT_DIR" \) ]; then
	echo "Checkout directory not specified or already exists!"
	exit -1
fi

### Start Processing ###

# Clone the main repo and enter the checkout dir
git clone git@github.com:${GITHUB_USERNAME}/${APPLICATION}.git ${CHECKOUT_DIR}

cd ${CHECKOUT_DIR}

# Change the submodule reference to point to this user's github fork instead
sed -i -e "s/url = git@github.com:pkp\/pkp-lib.git/url = git@github.com:${GITHUB_USERNAME}\/pkp-lib.git/" .gitmodules

# Initialize the submodules (on some git versions, this results in a checkout too)
echo "Initializing submodules..."
git submodule init
git submodule update
# Revert .gitmodules changes now that the submodules are initialized
git diff .gitmodules | patch -p1 -R

cd lib/pkp

echo "Configuring submodule remote..."
if [ "$CORE_TEAM" -eq 1 ]; then
	git remote add official git@github.com:pkp/pkp-lib.git
else
	git remote add official https://github.com/pkp/pkp-lib.git
fi
git checkout master
git pull official master

cd ../..

echo "Configuring main repository remote..."
if [ "$CORE_TEAM" -eq 1 ]; then
	git remote add official git@github.com:pkp/${APPLICATION}.git
else
	git remote add official https://github.com/pkp/${APPLICATION}.git
fi

# Flip the master branch over to remote (and fetch the tags)
git config branch.master.remote official
git pull
cd lib/pkp
git config branch.master.remote official
git pull
cd ../..

# Create branches for the various versions
for branch in `git branch -a | fgrep remotes/official | fgrep -v HEAD | fgrep -v master`; do
	git branch --track ${branch##*/} $branch
done
cd lib/pkp
for branch in `git branch -a | fgrep remotes/official | fgrep -v HEAD | fgrep -v master`; do
        git branch --track ${branch##*/} $branch
done
cd ../..

echo "Successfully checked out ${APPLICATION} into \"${CHECKOUT_DIR}\"."