Initial commit

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/

.rspec

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+--format documentation
+--color

.travis.yml

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+language: ruby
+rvm:
+  - 2.3.0
+before_install: gem install bundler -v 1.11.2

CODE_OF_CONDUCT.md

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+# Contributor Code of Conduct
+
+As contributors and maintainers of this project, and in the interest of
+fostering an open and welcoming community, we pledge to respect all people who
+contribute through reporting issues, posting feature requests, updating
+documentation, submitting pull requests or patches, and other activities.
+
+We are committed to making participation in this project a harassment-free
+experience for everyone, regardless of level of experience, gender, gender
+identity and expression, sexual orientation, disability, personal appearance,
+body size, race, ethnicity, age, religion, or nationality.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery
+* Personal attacks
+* Trolling or insulting/derogatory comments
+* Public or private harassment
+* Publishing other's private information, such as physical or electronic
+  addresses, without explicit permission
+* Other unethical or unprofessional conduct
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+By adopting this Code of Conduct, project maintainers commit themselves to
+fairly and consistently applying these principles to every aspect of managing
+this project. Project maintainers who do not follow or enforce the Code of
+Conduct may be permanently removed from the project team.
+
+This code of conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting a project maintainer at jason.dew@gmail.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. Maintainers are
+obligated to maintain confidentiality with regard to the reporter of an
+incident.
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 1.3.0, available at
+[http://contributor-covenant.org/version/1/3/0/][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/3/0/

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in elm-rails.gemspec
+gemspec

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2016 Jason Dew
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# Elm on Rails
+
+This gem adds support for compiling Elm source files via Sprockets. /ht @rtfeldman for the initial version (found [here](https://gist.github.com/rtfeldman/db7b121100b6c6ff435b))
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'elm-rails'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install elm-rails
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/jasondew/elm-rails. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).

Rakefile

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+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "elm/rails"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

elm-rails.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'elm/rails/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "elm-rails"
+  spec.version       = Elm::Rails::VERSION
+  spec.authors       = ["Jason Dew", "Richard Feldman"]
+  spec.email         = ["jason.dew@gmail.com", "richard.t.feldman@gmail.com"]
+
+  spec.summary       = %q{Compile Elm into JavaScript via Sprockets.}
+  spec.description   = %q{Compile Elm into JavaScript via Sprockets.}
+  spec.homepage      = "https://github.com/jasondew/elm-rails"
+  spec.license       = "MIT"
+
+  # Prevent pushing this gem to RubyGems.org by setting 'allowed_push_host', or
+  # delete this section to allow pushing this gem to any host.
+  if spec.respond_to?(:metadata)
+    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
+  else
+    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "railties",        ">= 4.0.0", "< 5.0"
+  spec.add_dependency "sprockets-rails", "~> 3.0"
+  spec.add_dependency "sprockets",       "~> 3.0"
+
+  spec.add_development_dependency "bundler", "~> 1.11"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+end

lib/elm/rails.rb

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+module Elm
+  module Rails
+  end
+end
+
+require "elm/rails/version"
+require "elm/rails/compiler"
+require "elm/rails/railtie"

lib/elm/rails/compiler.rb

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+require "open3"
+require "tempfile"
+
+module Elm
+  module Rails
+    class Compiler
+      def self.call(input)
+        new.call input
+      end
+
+      def call(input)
+        { data: compile(input[:filename]) }
+      end
+
+      private
+
+      def compile(input_filename)
+        input_directory = Pathname.new(input_filename).dirname
+        output_file = Tempfile.new %w{compiled_elm_output .js}
+
+        begin
+          output, status = Open3.capture2e(
+            {"LANG" => "en_US.UTF-8"},
+            elm_make,
+            input_filename,
+            "--yes",
+            "--output", output_file.path,
+            chdir: input_directory
+          )
+
+          raise output unless status.success?
+
+          output_file.read
+        ensure
+          output_file.unlink
+        end
+      end
+
+      def elm_make
+        `which elm-make`.chomp
+      end
+    end
+  end
+end

lib/elm/rails/railtie.rb

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+require "sprockets/railtie"
+
+module Elm
+  module Rails
+    class Railtie < ::Rails::Railtie
+      initializer :setup_elm_rails, group: :all do |app|
+        Sprockets.register_transformer "text/x-elm", "application/javascript", Elm::Rails::Compiler
+        Sprockets.register_mime_type "text/x-elm", extensions: %w{.elm}
+      end
+    end
+  end
+end

lib/elm/rails/version.rb

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+module Elm
+  module Rails
+    VERSION = "0.1.0"
+  end
+end

spec/elm/rails_spec.rb

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+require 'spec_helper'
+
+describe Elm::Rails do
+  it 'has a version number' do
+    expect(Elm::Rails::VERSION).not_to be nil
+  end
+
+  it 'does something useful' do
+    expect(false).to eq(true)
+  end
+end

spec/spec_helper.rb

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+$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+require 'elm/rails'