deploy.sh

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

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

# Save some useful information
REPO=`git config remote.origin.url`
SSH_REPO=${REPO/https:\/\/github.com\//git@github.com:}
SHA=`git rev-parse --verify HEAD`

# 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)
mkdir out && cd out
git init
git remote add origin $REPO
git pull origin $TARGET_BRANCH && git checkout -b $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
cd ..

# Clean out existing contents
rm -rf out/** || exit 0

# Run tests
./test.sh $1

# Attempt to build presets
./build.sh $1

# Pull requests and commits to other branches shouldn't try to deploy, just build to verify
if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_BRANCH" != "$SOURCE_BRANCH" ]; then
    echo "Skipping deploy."
    exit 0
fi

# Now let's go have some fun with the cloned repo
cd out
git config user.name "Travis CI"
git config user.email "$COMMIT_AUTHOR_EMAIL"

# Commit the "changes", i.e. the new version.
# The delta will show diffs between new and old versions.
git add .
git commit -m "Deploy to GitHub Pages: ${SHA}"

mv ../deploy_key .

# Get the deploy key by using Travis's stored variables to decrypt deploy_key.enc
chmod 600 deploy_key
eval `ssh-agent -s`
ssh-add deploy_key

# Now that we're all set up, we can push.
git push $SSH_REPO $TARGET_BRANCH