extract rails part to image_optim_rails, resolves #127

Author: toy

.travis.yml

@@ -18,9 +18,6 @@ script: |
     set -ex
     if [ -n "$RUBOCOP" ]; then
       bundle exec rubocop
-    elif [ -n "$RAILS_VERSION" ] && [ -z "$CODECLIMATE" ]; then
-      bundle exec image_optim --info
-      bundle exec rspec spec/image_optim/railtie_spec.rb
     else
       bundle exec image_optim --info
       bundle exec rspec
@@ -40,13 +37,7 @@ before_install: |
 matrix:
   fast_finish: true
   include:
-    - env: RAILS_VERSION='~> 3.2' SPROCKETS_VERSION='~> 2.0'
-      rvm: default
-    - env: RAILS_VERSION='~> 3.2'
-      rvm: default
-    - env: RAILS_VERSION='~> 4.0' SPROCKETS_RAILS_VERSION='~> 2.0'
-      rvm: '2'
-    - env: RAILS_VERSION='~> 4.0' CODECLIMATE=1
+    - env: CODECLIMATE=true
       rvm: '2'
     - env: RUBOCOP=true
       rvm: '2'

CHANGELOG.markdown

@@ -2,6 +2,7 @@
 
 ## unreleased
 
+* Rails image assets optimization is extracted into [image\_optim\_rails gem](https://github.com/toy/image_optim_rails) [#127](https://github.com/toy/image_optim/issues/127) [@toy](https://github.com/toy)
 * Add proper handling of `ImageOptim.respond_to?` [@toy](https://github.com/toy)
 * Fix an issue not working OptiPNG `interlace` option [#136](https://github.com/toy/image_optim/pull/136) [@mrk21](https://github.com/mrk21)
 * Minimize number of file system calls in default implementation of `optimized?` [#137](https://github.com/toy/image_optim/issues/137) [@toy](https://github.com/toy)

Gemfile

@@ -5,12 +5,3 @@ gemspec
 if ENV['CODECLIMATE']
   gem 'codeclimate-test-reporter', :group => :test, :require => nil
 end
-
-%w[
-  rails
-  sprockets
-  sprockets-rails
-].each do |gem_name|
-  version = ENV[gem_name.tr('-', '_').upcase + '_VERSION']
-  gem gem_name, version if version
-end

README.markdown

@@ -241,12 +241,7 @@ image_optim.optimize_images_data(datas)
 
 ### From rails
 
-`ImageOptim::Railtie` will automatically register sprockets preprocessor unless you set `config.assets.image_optim = false` or `config.assets.compress = false` (later for partial rails 3 compatibility).
-
-You can provide options for image_optim used for preprocessor through config `config.assets.image_optim = {nice: 20, svgo: false}` (ruby1.8 style: `{:nice => 20, :svgo => false}`).
-Check available options in [options section](#options).
-
-Image optimization can be time consuming, so depending on your deployment process you may prefer to optimize original asset files.
+Rails image assets optimization is extracted into [image\_optim\_rails gem](https://github.com/toy/image_optim_rails).
 
 ## Configuration
 

image_optim.gemspec

@@ -15,6 +15,11 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = %w[lib]
 
+  s.post_install_message = <<-EOF
+Rails image assets optimization is extracted into image_optim_rails gem
+You can safely remove `config.assets.image_optim = false` if you are not going to use that gem
+EOF
+
   s.add_dependency 'fspath', '~> 3.0'
   s.add_dependency 'image_size', '~> 1.3'
   s.add_dependency 'exifr', '~> 1.2', '>= 1.2.2'

lib/image_optim.rb

@@ -5,7 +5,6 @@
 require 'image_optim/image_meta'
 require 'image_optim/optimized_path'
 require 'image_optim/path'
-require 'image_optim/railtie' if defined?(Rails)
 require 'image_optim/worker'
 require 'in_threads'
 require 'shellwords'