#!/usr/bin/env bash

# A script to build griffin site (based on jekyll)

# specify source and site branches
SOURCE="master"
SITE="asf-site"

# Make sure on the SOURCE branch
git checkout $SOURCE > /dev/null 2>&1

# Get the latest commit SHA in SOURCE branch
last_SHA=( $(git log -n 1 --pretty=format:"%H") )

# use last commit sha as temp folder name
tmp_dir="temp_$last_SHA"

# Build the Jekyll site  to our temporary folder
jekyll build -d ~/$tmp_dir > /dev/null 2>&1
if [ $? = 0 ]; then
  echo "Jekyll build successful"
else
  echo "Jekyll build failed"
  exit 1
fi

# Switch to the SITE branch
git checkout $SITE > /dev/null 2>&1
if [ $? = 1 ]; then
  # Branch does not exist. Create an orphan branch.
  git checkout -b $SITE > /dev/null 2>&1
  git add --all .
  git commit -m "Initial commit" > /dev/null 2>&1
  echo "$SITE branch does not exist, create new branch $SITE"
fi

# Remove the current contents of the SITE branch and
#   replace them with the contents of the temp folder
current_dir=${PWD}
rm -r $current_dir/*
git rm -r --cached * > /dev/null 2>&1
cp -r ~/$tmp_dir/* $current_dir

# Commit the changes to the SITE branch
message="Updated $SITE site from $SOURCE ($last_SHA)"
git add --all .
git commit -m "$message" > /dev/null 2>&1

# Delete the temporary folder
rm -r ~/$tmp_dir

# Push latest SITE to server
git push -u origin $SITE -f > /dev/null 2>&1
if [ $? = 0 ]; then
  echo "Push $SITE successful"
else
  echo "Push $SITE failed"
fi

# Switch back to SOURCE branch
git checkout $SOURCE > /dev/null 2>&1

# Push the SOURCE to the server
git push -u origin $SOURCE > /dev/null 2>&1
if [ $? = 0 ]; then
 echo "Push $SOURCE successful"
else
 echo "Push $SOURCE failed"
fi