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#!/usr/bin/env bash

# Abort on first error
set -e

# Directories
ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
DIST_DIR="$ROOT_DIR/build/dokka"
PAGES_DIR="$ROOT_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 dokka

# 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"

# Fixup all the old documentation files
# Remove non-.html files
git rm $(find . -type f -not -name '*.html' -not -name '.git') > /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