_build_and_deploy.sh

#!/bin/sh
set -e # Exit with nonzero exit code if anything fails


# Copied from here: https://gist.github.com/domenic/ec8b0fc8ab45f39403dd

SOURCE_BRANCH="master"
TARGET_BRANCH="gh-pages"
LEANPUB_BRANCH="leanpub"

BUILD_COMMIT_MSG="Update book (travis build ${TRAVIS_BUILD_NUMBER})"

BRANCH=$(if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then echo $TRAVIS_BRANCH; else echo $TRAVIS_PULL_REQUEST_BRANCH; fi)



cd manuscript
# Create references
make -B 10-references.Rmd
# Compile html version of book for gh-pages
make -B html
# Compile md version of book for leanpub
# make -B leanpub
cd ..

## Only deploy when on master branch of main repository
if [  "$BRANCH" = "master" -a "$TRAVIS_PULL_REQUEST" = "false" ] ; then

  echo "Deploying master to gh-pages."
  # Clone the existing gh-pages for this repo into out/
  # Create a new empty branch if gh-pages doesn't exist yet (should only happen on first deply)
  git clone -b $TARGET_BRANCH https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git out
  cd out
  git rm -rf ./*
  cp -r ../manuscript/_book/* ./
  touch .nojekyll
  git add .nojekyll

  git add --all ./*

  # Get the deploy key by using Travis's stored variables to decrypt deploy_key.enc
  git config credential.helper "store --file=.git/credentials"
  echo "https://${GH_TOKEN}:@github.com" > .git/credentials
  git commit -m "${BUILD_COMMIT_MSG}" --allow-empty

  # Now that we're all set up, we can push.
  git push origin $TARGET_BRANCH
  
  
  # echo "Deploying master to leanpub branch."
  # cd ../
  # rm -r out
  # git add -f manuscript/*.md
  # git add -f images/*
  # git commit -m "${BUILD_COMMIT_MSG}"
  # git push origin $LEANPUB_BRANCH

else
  echo "Changes are not being deployed, since this is a fork / branch."
fi