#!/bin/bash

set -x

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

SOURCE_BRANCH="main"

TARGET_BRANCH="gh-pages"

function doCompile {

./compile.sh

}

# 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."

doCompile

exit 0

fi

# Save some useful information

REPO=`git config remote.origin.url`

SSH_REPO=${REPO/https:\/\/github.com\//[email protected]:}

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)

# Delete all existing contents except .git (we will re-create them)

git clone $REPO out

cd out

git checkout $TARGET_BRANCH || git checkout --orphan $TARGET_BRANCH

find -maxdepth 1 ! -name .git ! -name . | xargs rm -rf

cd ..

# Run our compile script

doCompile

# 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"

# If there are no changes to the compiled out (e.g. this is a README update) then just bail.

if git diff --quiet; 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 -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}

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

# Now that we're all set up, we can push.

git push $SSH_REPO $TARGET_BRANCH