auto-deploy

#!/bin/bash

# Exit with nonzero exit code if anything fails
set -e

# Pull requests and commits to other branches shouldn't be deployed
if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_BRANCH" != "$DEPLOY_GIT_SOURCE_BRANCH" ]; then
    echo "Pull request or push to non-$DEPLOY_GIT_SOURCE_BRANCH branch; skipping deploy."
    exit 0
fi

# 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 deploy)
git clone $REPO out
cd out
git checkout $DEPLOY_GIT_BRANCH || git checkout --orphan $DEPLOY_GIT_BRANCH

# Clean out existing contents
find . -maxdepth 1 ! -name '.git' ! -name '.gitignore' -exec rm -rf {} \;
cd ..

# Move compiled and tested site to out/
cp -r dist/* out/
cp CNAME out/

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

# If there are no changes to the compiled out (e.g. this is a README update) then just bail.
if [ $(git status --porcelain | wc -l) -lt 1 ]; then
    echo "No changes to the output on this push; exiting."
    exit 0
fi

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

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