From 811b6cf9981d7b778f7643fbbb10c548927560f5 Mon Sep 17 00:00:00 2001
From: Jakub Jirutka <jakub@jirutka.cz>
Date: Tue, 19 Jun 2018 19:43:32 +0200
Subject: Set up compilation to JavaScript using Opal

---
 .gitignore   |  4 ++++
 .rubocop.yml |  4 ++++
 .travis.yml  |  1 +
 Gemfile      |  5 +++++
 Rakefile     | 19 +++++++++++++++++++
 package.json | 34 ++++++++++++++++++++++++++++++++++
 6 files changed, 67 insertions(+)
 create mode 100644 package.json

diff --git a/.gitignore b/.gitignore
index 23f8e8c..7039ac3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,8 +2,12 @@
 /.yardoc/
 /coverage/
 /doc/
+/js/
 /pkg/
 /tmp/
+node_modules/
 Gemfile.lock
+package-lock.json
 *.bundle
 *.gem
+*.log
diff --git a/.rubocop.yml b/.rubocop.yml
index 880c493..da8564c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -26,6 +26,10 @@ Layout/MultilineMethodCallIndentation:
 Lint/EndAlignment:
   EnforcedStyleAlignWith: variable
 
+Layout/IndentHash:
+  Exclude:
+    - Rakefile
+
 Metrics/AbcSize:
   Max: 30
 
diff --git a/.travis.yml b/.travis.yml
index 7825d8e..4476f2c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -52,6 +52,7 @@ before_install:
 script:
   - bundle exec rake spec
   - bundle exec rake rubocop
+  - bundle exec rake build:js
 
 deploy:
   provider: rubygems
diff --git a/Gemfile b/Gemfile
index 80fe15a..ea42769 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,11 @@ unless ENV.fetch('ASCIIDOCTOR_VERSION', '').empty?
   end
 end
 
+group :development do
+  # Keep in sync with version used for asciidoctor.js.
+  gem 'opal', '~> 0.11.0'
+end
+
 group :ci do
   gem 'codacy-coverage', '~> 1.1', require: false
 end
diff --git a/Rakefile b/Rakefile
index aa8614e..bc86f92 100644
--- a/Rakefile
+++ b/Rakefile
@@ -22,3 +22,22 @@ begin
 rescue LoadError => e
   warn "#{e.path} is not available"
 end
+
+namespace :build do
+  desc 'Transcompile to JavaScript using Opal'
+  task :js do
+    require 'opal'
+
+    builder = Opal::Builder.new(compiler_options: {
+      dynamic_require_severity: :error,
+    })
+    builder.append_paths 'lib'
+    builder.build 'asciidoctor-interdoc-reftext'
+
+    out_file = 'js/asciidoctor-interdoc-reftext.js'
+
+    mkdir_p(File.dirname(out_file), verbose: false)
+    File.binwrite out_file, builder.to_s
+    File.binwrite "#{out_file}.map", builder.source_map
+  end
+end
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..e2f04de
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "asciidoctor-interdoc-reftext",
+  "version": "0.2.0",
+  "description": "Asciidoctor extension providing implicit (automatic) reference text (label) for inter-document cross references",
+  "main": "js/asciidoctor-interdoc-reftext.js",
+  "files": [
+    "js/asciidoctor-interdoc-reftext.js",
+    "LICENSE",
+    "README.adoc"
+  ],
+  "scripts": {
+    "prepublishOnly": "bundle install && bundle exec rake build:js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jirutka/asciidoctor-interdoc-reftext.git"
+  },
+  "keywords": [
+    "asciidoc",
+    "asciidoctor",
+    "extension",
+    "opal"
+  ],
+  "author": "Jakub Jirutka <jakub@jirutka.cz>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/jirutka/asciidoctor-interdoc-reftext/issues"
+  },
+  "homepage": "https://github.com/jirutka/asciidoctor-interdoc-reftext",
+  "dependencies": {
+    "asciidoctor.js": "^1.5.6",
+    "opal-runtime": "^1.0.3"
+  }
+}
-- 
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