github_pages_deploy.sh

#!/bin/bash
#
# Deploy the PDF, HTML, EPUB files of an Underscore book (source)
# into another Git repository (target)
#
set -e

if [[ "${TRAVIS_PULL_REQUEST}" == "false" && 
      "${TRAVIS_BRANCH}" == "3.3" 
]]; then

# Configuration
# 1. The key for writing into the other repository:
export KEY_FILENAME=essential_slick_deploy.enc

# 2. Folder inside target of where to place the artifacts:
export TARGET_PATH=books/essential-slick/
# End of configuration

echo "Starting deploy to github pages"
echo -e "Host github.com\n\tStrictHostKeyChecking no\nIdentityFile ~/.ssh/deploy.key\n" >> ~/.ssh/config
openssl aes-256-cbc -k "$SERVER_KEY" -in $KEY_FILENAME -d -a -out deploy.key
cp deploy.key ~/.ssh/
chmod 600 ~/.ssh/deploy.key

git config --global user.email "hello@underscore.io"
git config --global user.name "Travis Build"

export SRC_DIR=`pwd` # e.g., /home/travis/build/underscoreio/essential-slick
export TARGET_DIR=/tmp/dist
mkdir $TARGET_DIR
cd $TARGET_DIR
git clone git@github.com:underscoreio/books.git
cd $TARGET_PATH

cp $SRC_DIR/dist/*.pdf .
cp $SRC_DIR/dist/*.html .
cp $SRC_DIR/dist/*.epub .

git add .
git commit -m "auto commit via travis $TRAVIS_JOB_NUMBER $TRAVIS_COMMIT [ci skip]"
git push git@github.com:underscoreio/books.git master:master

rm -rf $TARGET_DIR
fi