installer

#!/bin/bash

pwd=$1
work_dir=$2

mkdir -p $work_dir
cd $pwd

if [ `which git` ] && [ `git rev-parse HEAD` ]; then
    git submodule deinit --all --force
    git submodule sync
    git submodule update --init
    git submodule foreach git checkout master
    git submodule foreach git pull origin master
else
	if [ `which curl` ]; then
		DLAPP=`which curl`" -L -o __OUT__ __URL__"
	elif [ `which wget` ]; then
		DLAPP=`which wget`" --progress=dot -O __OUT__ __URL__"
	else
		exit 1
	fi

	modules=$(cat .gitmodules | tr -d '\n' | sed -e "/\[submodule \"[^\"]\+\"\]\s\+/{s//\n/g}" | sed -e "/\(\s*url = \)\?\(.*\?\)\t*path = \([^\t]\+\)\t*\(url = \)\?\(.*\)/{s//\3\t\2\5/g}" | awk '{$1=$1};1')

	IFS=$'\n'
	for module in $modules;
	do
		IFS=' ' read -ra repo <<< $module
		api_url=${repo[1]/https:\/\/github.com/https:\/\/api.github.com\/repos}"/commits"
		repo_sfn=${repo[0]/\//_}.commits
		checksums=$pwd/SHA256SUMS
		api=${DLAPP/__OUT__/\/tmp\/$repo_sfn}
		api=${api/__URL__/$api_url}
		eval $api

		if [ ! -f $checksums ] || [ ! `grep $repo_sfn $checksums` ]; then
			echo `sha256sum /dev/null | awk '{print $1}'`" /tmp/$repo_sfn" >> $checksums
		fi

		if ! `sha256sum --strict --status -c $checksums`; then
			path=$work_dir/${repo[0]}
			url=${repo[1]}"/archive/master.zip"

			mkdir -p $path

			download=${DLAPP/__OUT__/$path.zip}
			download=${download/__URL__/$url}

			mkdir -p $path
			eval $download
			unzip -o $path.zip -d $path
			mv $path/*/* $path
			rm $path.zip
		fi

		old_checksum=`grep $repo_sfn $checksums | awk '{print $1}'`
		new_checksum=`sha256sum /tmp/$repo_sfn | awk '{print $1}'`
		sed -i "s/$old_checksum/$new_checksum/" $checksums
		rm /tmp/$repo_sfn
	done
fi

cp -r . $work_dir/

if [ ! -f $work_dir/images/custom-logo.png ]; then
	cp $work_dir/images/logo.png $work_dir/images/custom-logo.png
fi

rm -rf $work_dir/app
rm -rf $work_dir/config
rm -rf $work_dir/.git
rm -rf $work_dir/Gemfile
rm -rf $work_dir/installer
rm -rf $work_dir/lib
rm -rf $work_dir/init.rb