post-receive

#!/usr/bin/env bash
#
# Author: Jake Zimmerman
# Created: Tue 01 Sep 2015
# Last modified: Tue 01 Sep 2015
#
#
# post-receive hook
#
# Deploys a this repository to the deployment directory by forcing a checkout
# every time that we receive a change to the master branch from a push.

indent() { awk '{sub(/^/,"    ");print}'; }

# Fail if errors
set -o errexit

echo -e "\n\n"

# Initialize constants
SEMESTER="f21"

ROOT_DIR="/afs/cs/academic/class/07131-f18"
STAGING_DIR="$ROOT_DIR/.tmp"
GEM_HOME="$ROOT_DIR/.gems"
DEPLOYMENT_DIR="$ROOT_DIR/www/$SEMESTER"

read from_commit to_commit ref_name

if [[ ! $ref_name =~ .*/master$ ]]; then
  echo "Ref $ref_name is not master, skipping deployment."
  exit 0
fi

# Deploy the project
echo "Deploying project to $DEPLOYMENT_DIR"

rm -rf "$STAGING_DIR"
mkdir -p "$STAGING_DIR" "$GEM_HOME"

GIT_WORK_TREE="$STAGING_DIR" git checkout -f master

cd $STAGING_DIR

# for more information on the interplay of these variables, see this article:
# http://blog.jez.io/2014/12/22/ruby-virtualenvs/
export GEM_HOME
unset GEM_PATH
export PATH="$GEM_HOME/bin:$PATH"

echo -e "\nInstalling bundler"
gem install bundler | indent

echo -e "\nInstalling requirements"
bundle install | indent

echo -e "\nCompiling project"
jekyll build --destination "$DEPLOYMENT_DIR" | indent

rm -rf $STAGING_DIR

echo -e "\n\nSuccessfully deployed branch master.\n\n"