deploy.sh

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

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

# 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; just doing a build."
    make build
    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 deply)
git clone $REPO $OUTPUT
cd $OUTPUT
git checkout $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH
cd ..

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

# Run our compile script
make build


# Now let's go have some fun with the cloned repo
cd $OUTPUT
git config user.name "Travis CI"
git config user.email "cloud4rpi@gmail.com"

# Configuring GitHub Pages Custom Domain
echo -n "docs.cloud4rpi.io" > CNAME

# If there are no changes (e.g. this is a README update) then just bail.
echo "Looking for changes:"
git diff -G"^([^B]|B[^u]|Bu[^i]|Bui[^l]|Buil[^d]|Build[^ ]|Build [^D]|Build D[^a]|Build Da[^t]|Build Dat[^e]|Build Date[^ ]|Build Date [^U])"
if [[ -z `git diff -G"^([^B]|B[^u]|Bu[^i]|Bui[^l]|Buil[^d]|Build[^ ]|Build [^D]|Build D[^a]|Build Da[^t]|Build Dat[^e]|Build Date[^ ]|Build Date [^U])" --exit-code` ]]; then
    echo "No changes to the spec on this push; exiting."
    exit 0
fi

# Commit the the new version.
git add -A .
git commit -m "Deploy to GitHub Pages: ${SHA}"

# Get the deploy key by using Travis's stored variables to decrypt deploy_key.enc
ENCRYPTED_KEY_VAR="encrypted_${ENCRYPTION_LABEL}_key"
ENCRYPTED_IV_VAR="encrypted_${ENCRYPTION_LABEL}_iv"
ENCRYPTED_KEY=${!ENCRYPTED_KEY_VAR}
ENCRYPTED_IV=${!ENCRYPTED_IV_VAR}

cd ..
openssl aes-256-cbc -K $ENCRYPTED_KEY -iv $ENCRYPTED_IV -in deploy_key.enc -out deploy_key -d
chmod 600 deploy_key
eval `ssh-agent -s`
ssh-add deploy_key

cd $OUTPUT

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

# Killing ssh-agent to let the session finish
ssh-agent -k