Git post-receive hook to deploy WordPress and plugins as submodules. It can also install Node.js modules with npm and vendor packages with Composer.

post-receive.sh

#!/bin/bash

# Created on 7/17/13 by Ryan Sechrest
# Deploys pushed branch from the origin repository to the web directory

if [[ (-n $1) && (-n $2) && (-n $3) ]]; then

	# Set path to project directory
	project_path="/var/www/domains/$2/$3"

	# Set web directory name
	web_dir="htdocs"

	# Set path to web directory
	web_path="$project_path/$web_dir"

	# For each branch that was pushed
	while read oldrev newrev refname
	do

		# Get branch name
		branch=$(git rev-parse --symbolic --abbrev-ref $refname)
		echo "> Received $branch branch"

		# Assume no target branch pushed
		target_branch=false

		# Determine whether current branch is target branch for environment
		if [[ "$FH_ENVIRONMENT" == "LOCALHOST" ]]; then
			echo '> Determined environment is LOCALHOST'

			if [[ "$branch" == "develop" || "$branch" == "feature/"* ]]; then
				target_branch=true
				echo "> Determined $branch branch is target branch"

			fi
		elif [[ "$FH_ENVIRONMENT" == "DEVELOPMENT" ]]; then
			echo '> Determined environment is DEVELOPMENT'

			if [[ "$branch" == "develop" || "$branch" == "release/"* ]]; then
				target_branch=true
				echo "> Determined $branch branch is target branch"

			fi
		elif [[ "$FH_ENVIRONMENT" == "STAGING" ]]; then
			echo "> Determined environment is STAGING"

			if [[ "$branch" == "master" || "$branch" == "hotfix/"* ]]; then
				target_branch=true
				echo "> Determined $branch branch is target branch"

			fi
		else
			echo "> Determined environment is PRODUCTION"

			if [[ "$branch" == "master" ]]; then
				target_branch=true
				echo "> Determined $branch branch is target branch"

			fi
		fi

		# If branch is target branch
		if $target_branch ; then
			echo "> Processing $branch branch"

			# Unset global GIT_DIR so script can leave repository
			unset GIT_DIR
			echo "> Unset GIT_DIR"

			# Move into web directory
			cd $web_path
			echo "> Moved into $web_path directory"

			# If web directory is empty
			if find . -maxdepth 0 -empty | read; then
				echo "> Determined web directory is empty"

				# Clone branch from origin repository into web directory
				git clone /opt/repositories/$1.git -b $branch .
				echo "> Cloned origin/$branch branch from $1.git repository into web directory"

				# Create empty file to remember created date
				touch $web_path/.created
				echo "> Created .created file in web directory"

			# If web directory is not empty
			else
				echo "> Determined web directory contains files"

				# Get HEAD of working directory
				current_branch=$(git rev-parse --abbrev-ref HEAD)
				echo "> Determined working directory is on $current_branch branch"

				# If branch matches HEAD of working directory
				if [ "$branch" == "$current_branch" ]; then
					echo "> Determined updates affect current branch"

					# Fetch and merge changes into web directory
					git pull origin $branch
					echo "> Pulled origin/$branch into $branch branch in web directory"

				# If branch does not match HEAD of working directory
				else
					echo "> Determined updates belong to new branch"

					# Fetch changes from origin
					git fetch origin
					echo "> Fetched changes from origin"

					# Checkout new branch
					git checkout $branch
					echo "> Checked out $branch branch in web directory"
				fi

				# Create or update empty file to remember last updated date
				touch $web_path/.updated
				echo "> Updated .updated file in web directory"
			fi

			# Fetch commits and tags for each submodule
			git submodule foreach git fetch --tags
			echo "> Fetched commits and tags for each submodule"

			# Update all submodules
			git submodule update --init --recursive
			echo "> Initialized and updated all submodules"

			# If Node.js package file exists in web directory
			if [ -f "$web_path/nodejs/package.json" ]; then
				echo "> Determined $web_dir/nodejs/package.json file exists"

				# If Node.js directory does not exist in project directory
				if [ ! -d "$project_path/nodejs" ]; then
					echo "> Determined $project_path/nodejs directory does not exist"

					# Create Node.js directory in project directory
					mkdir $project_path/nodejs
					echo "> Created $project_path/nodejs directory"
				fi

				# Copy package.json from web to project directory
				cp $web_path/nodejs/package.json $project_path/nodejs/package.json
				echo "> Copied package.js from web to project directory"

				# Move into Node.js directory in project directory
				cd $project_path/nodejs
				echo "> Moved into $project_path/nodejs directory"

				# Install Node.js modules
				npm install $project_path/nodejs
				echo "> Installed Node.js modules in $project_path/nodejs directory"

				# Move into web directory
				cd $web_path
				echo "> Moved into $web_path directory"
			fi

			# If website is WordPress powered
			if [ -d "$web_path/wordpress" ]; then
				echo "> Determined website runs WordPress"

				# If nodejs/product directory exists
				if [ -d "$web_path/nodejs/product" ]; then
					echo "> Determined $web_dir/nodejs/product directory exists"

					# If product/sources directory does not exist
					if [ ! -d "$web_path/wp-content/product/sources" ]; then
						echo "> Determined $web_dir/wp-content/product/sources directory does not exist"

						# Create sources directory
						mkdir -p $web_path/wp-content/product/sources
						echo "> Created $web_dir/wp-content/product/sources directory"

						# Give Apache permissions to write to sources
						chmod g+w $web_path/wp-content/product/sources
						echo "> Added write permissions to $web_dir/wp-content/product/sources directory"
					fi
				fi

				# If uploads directory does not exist
				if [ ! -d "$web_path/wp-content/uploads" ]; then
					echo "> Determined $web_dir/wp-content/uploads does not exist"

					# Create uploads directory
					mkdir $web_path/wp-content/uploads
					echo "> Created $web_dir/wp-content/uploads directory"

					# Give Apache permissions to write to uploads
					chmod g+w $web_path/wp-content/uploads
					echo "> Added write permissions to $web_dir/wp-content/uploads"
				fi

				# If w3-total-cache directory exists
				if [ -d "$web_path/wp-content/plugins/w3-total-cache" ]; then
					echo "> Determined WordPress has W3 Total Cache installed"

					# If cache directory does not exist
					if [ ! -d "$web_path/wp-content/cache" ]; then
						echo "> Determined $web_dir/wp-content/cache does not exist"

						# Create cache directory for cache files
						mkdir $web_path/wp-content/cache
						echo "> Created $web_dir/wp-content/cache directory"

						# Allow Apache to write to cache
						chmod g+w $web_path/wp-content/cache
						echo "> Added write permissions to $web_dir/wp-content/cache"
					fi

					# If w3tc-config directory does not exist
					if [ ! -d "$web_path/wp-content/w3tc-config" ]; then
						echo "> Determined $web_dir/wp-content/w3tc-config does not exist"

						# Create w3tc-config directory for configuration files
						mkdir $web_path/wp-content/w3tc-config
						echo "> Created $web_dir/wp-content/w3tc-config directory"

						# Allow Apache to write to w3tc-config
						chmod g+w $web_path/wp-content/w3tc-config
						echo "> Added write permissions to $web_dir/wp-content/w3tc-config"
					fi
				fi

				# If external-media-integration directory exists
				if [ -d "$web_path/wp-content/plugins/external-media-integration" ]; then
					echo "> Determined WordPress has External Media Integration installed"

					# Move into plugin directory
					cd $web_path/wp-content/plugins/external-media-integration
					echo "> Moved into $web_path/wp-content/plugins/external-media-integration directory"

					# Install required vendor files
					composer install --verbose
					echo "> Installed vendor packages with Composer"

					# Move into web directory
					cd $web_path
					echo "> Moved into $web_path directory"
				fi
			fi
		fi
	done

# Print arguments to debug
else
	echo "Not all required variables have values:"
	echo "> FULL_DOMAIN: $1"
	echo "> ROOT_DOMAIN: $2"
	echo "> SUB_DOMAIN: $3"
fi