site/deploy.sh

#!/usr/bin/env bash

# Abort on first error
set -e

# Directories
SITE_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
ROOT_DIR="$SITE_DIR/.."
BUILD_DIR="$SITE_DIR/build"
DIST_DIR="$BUILD_DIR/dist"
PAGES_DIR="$BUILD_DIR/pages"

# Init options
GRADLE_OPT=
PUSH_OPT=

# Set dry run if needed
if [ "$2" == "push" ] ; then
    echo "--- Doing LIVE site deployment, so do clean build"
    GRADLE_OPT=clean
else
    echo "--- Doing dry-run. To commit do 'deploy.sh <version> push'"
    PUSH_OPT=--dry-run
fi

# Makes sure that site is built
"$ROOT_DIR/gradlew" $GRADLE_OPT site

# Cleanup dist directory (and ignore errors)
rm -rf "$PAGES_DIR" || true

# Prune worktrees to avoid errors from previous attempts
git --work-tree "$ROOT_DIR" worktree prune

# Create git worktree for gh-pages branch
git --work-tree "$ROOT_DIR" worktree add -B gh-pages "$PAGES_DIR" origin/gh-pages

# Now work in newly created workspace
cd "$PAGES_DIR"

# Remove all the old documentation
git rm -r * > /dev/null

# Copy new documentation from dist
cp -r "$DIST_DIR"/* "$PAGES_DIR"

# Add it all to git
git add *

# Commit docs for the new version
if [ -z "$1" ] ; then
    echo "No argument with version supplied -- skipping commit"
else
    git commit -m "Version $1 docs"
    git push $PUSH_OPT origin gh-pages:gh-pages
fi