#!/usr/bin/env bash

if [ $(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/') != "master" ]; then
  echo >&2 "Looks like you're not on the master branch. Checkout master and run this script."
  exit 1
fi

if [[ -n $(git status --porcelain 2> /dev/null) ]]; then
  echo >&2 "Looks like you're in a dirty head state. Clean-up un-committed files before and run this script again."
  exit 1
fi

echo "$ git pull"
git pull

echo "$ npm install"
npm install

echo "$ npm test node && npm test browser"
npm test node && npm test browser

if [ $? -ne 0 ]; then
  echo >&2 "Looks like there are failing tests. Make sure all tests pass and run this script again."
  exit 1
fi

echo "$ eslint --quiet src"
eslint --quiet src

if [ $? -ne 0 ]; then
  echo >&2 "Looks like there are linting errors. Make sure all errors are cleaned-up and run this script again."
  exit 1
fi

echo "Existing releases:"
git tag -l

read -p "Enter the version number for this release (eg '1.4.5'): " version

echo "Building docs..."
npm run docs
echo "Building dist..."
npm run build
echo "Updating NPM and Bower manifests..."
sed -i.bak -E "s/\"version\": \"[0-9]+\.[0-9]+\.[0-9]+\"/\"version\": \"$version\"/" package.json
rm package.json.bak
sed -i.bak -E "s/\"version\": \"[0-9]+\.[0-9]+\.[0-9]+\"/\"version\": \"$version\"/" bower.json
rm bower.json.bak

read -p "Are you sure you want to release v$version? (yes/no) " confirm

if [ $confirm != "yes" ]; then
  echo "Aborting."
  exit 0
fi

echo "$ git add ."
git add .
echo "$ git commit -a -m \"Release v$version.\""
git commit -a -m "Release v$version."
echo "$ git tag \"v$version\""
git tag "v$version"
echo "$ git push"
git push
echo "$ git push --tags"
git push --tags
echo "$ npm publish"
npm publish

echo "Updating the website..."

tmpdir=$(mktemp -d "${TMPDIR:-/tmp}/release.XXXX")

# Copy dist, docs & example to a temp dir.
cp -R dist "$tmpdir/dist"
cp -R docs "$tmpdir/docs"
cp -R example "$tmpdir/example"
# Checkout the GitHub pages branch.
echo "$ git checkout gh-pages"
git checkout gh-pages
# Delete the current dist & example dirs.
rm -r dist example
# Copy across the new dist, docs & example dirs.
cp -R "$tmpdir"/dist dist
cp -R "$tmpdir"/dist "releases/v$version"
cp -R "$tmpdir"/docs "docs/v$version"
cp -R "$tmpdir"/example example
# Clean-up the temp dir.
rm -r $tmpdir
# Fix mentions of the version number.
sed -i.bak -E "s/v[0-9]+\.[0-9]+\.[0-9]+/v$version/g" index.html
rm index.html.bak
# Add, commit & push.
echo "$ git add ."
git add .
echo "$ git commit -a -m \"Release v$version.\""
git commit -a -m "Release v$version."
echo "$ git push"
git push

git checkout master

echo
echo "Done. All that's left to do is add details to the release notes on GitHub."
echo