deploy_pages.sh

#!/usr/bin/env bash
# Strict mode: http://redsymbol.net/articles/unofficial-bash-strict-mode/
set -euo pipefail
IFS=$'\n\t'

SOURCE_BRANCH="master"
TARGET_BRANCH="gh-pages"
TARGET_REPO="git@github.com:cssu/cssu.ca.git"
SHA="$(git rev-parse --verify HEAD)"

# Decrypt deploy key
echo "Decrypting deploy key to .travis/deploy_key..."
openssl aes-256-cbc -K $encrypted_d7c771f4f1c5_key -iv $encrypted_d7c771f4f1c5_iv -in .travis/deploy_key.enc -out .travis/deploy_key -d

# Add deploy key to SSH agent
echo "Adding deploy key .travis/deploy_key to ssh-agent..."
eval "$(ssh-agent -s)"
chmod 600 .travis/deploy_key
ssh-add .travis/deploy_key

# Clone the existing gh-pages for this repo into out/
git clone "$TARGET_REPO" gh_pages_repo
cd gh_pages_repo
git checkout "$TARGET_BRANCH"
cd ..

echo Clean out existing contents and copy in Jekyll site
rsync -av --exclude ".git" --delete _site/ gh_pages_repo/

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

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

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