require 'bundler'

Bundler.require

require 'fileutils'

REMOTE_NAME = "origin"

GH_PAGES_BRANCH = 'master'

PROJECT_ROOT = `git rev-parse --show-toplevel`.strip

BUILD_DIR = File.join(PROJECT_ROOT, "build")

GH_PAGES_REF = File.join(BUILD_DIR, ".git/refs/remotes/#{REMOTE_NAME}/#{GH_PAGES_BRANCH}")

directory BUILD_DIR

file GH_PAGES_REF => BUILD_DIR do

repo_url = nil

cd PROJECT_ROOT do

repo_url = `git config --get remote.#{REMOTE_NAME}.url`.strip

end

cd BUILD_DIR do

sh "git init"

sh "git remote add #{REMOTE_NAME} #{repo_url}"

sh "git fetch #{REMOTE_NAME}"

if `git branch -r` =~ /#{GH_PAGES_BRANCH}/

sh "git checkout -f #{GH_PAGES_BRANCH}"

else

sh "git checkout --orphan #{GH_PAGES_BRANCH}"

sh "touch index.html"

sh "git add ."

sh "git commit -m 'initial #{GH_PAGES_BRANCH} commit'"

sh "git push #{REMOTE_NAME} #{GH_PAGES_BRANCH}"

end

end

end

# Alias to something meaningful

task :prepare_git_remote_in_build_dir => GH_PAGES_REF

# Fetch upstream changes on gh-pages branch

task :sync do

cd BUILD_DIR do

sh "git fetch #{REMOTE_NAME}"

sh "git reset --hard #{REMOTE_NAME}/#{GH_PAGES_BRANCH}"

end

end

# Prevent accidental publishing before committing changes

task :not_dirty do

puts "***#{ENV['ALLOW_DIRTY']}***"

unless ENV['ALLOW_DIRTY']

fail "Directory not clean" if /nothing to commit/ !~ `git status`

end

end

desc "Compile all files into the build directory"

task :build do

cd PROJECT_ROOT do

sh "bin/build"

end

end

desc "Refresh the libraries page contents from awesome-opal"

task :libraries do

puts 'Downloading from fazibear/awesome-opal...'

require 'open-uri'

awesome_page = open 'https://raw.githubusercontent.com/fazibear/awesome-opal/master/README.md'

awesome_contents = awesome_page.read

File.write "#{__dir__}/source/libraries.html.md", <<~MD

---

title: "Libraries (Awesome Opal)"

---

_the following content comes from the *awesome* [🕶awesome-opal](https://github.com/fazibear/awesome-opal#readme) page by [Michał Kalbarczyk](https://github.com/fazibear)_

---

#{awesome_contents}

MD

puts "Done, downloaded #{awesome_contents.bytesize} bytes."

end

desc "Build and publish to Github Pages"

task :publish => [:not_dirty, :prepare_git_remote_in_build_dir, :sync, :build] do

message = nil

suffix = ENV["COMMIT_MESSAGE_SUFFIX"]

cd PROJECT_ROOT do

head = `git log --pretty="%h" -n1`.strip

message = ["Site updated to #{head}", suffix].compact.join("\n\n")

end

cd BUILD_DIR do

sh 'git add --all'

if /nothing to commit/ =~ `git status`

puts "No changes to commit."

else

sh "git commit -m \"#{message}\""

end

sh "git push #{REMOTE_NAME} #{GH_PAGES_BRANCH}"

end

end

task default: :build