Add CoC and README for theme; make standard with Rubocop

lib/jekyll/commands/new_theme.rb

@@ -1,11 +1,11 @@
-require 'erb'
+require "erb"
 
 class Jekyll::Commands::NewTheme < Jekyll::Command
   class << self
     def init_with_program(prog)
       prog.command(:"new-theme") do |c|
-        c.syntax 'new-theme NAME'
+        c.syntax "new-theme NAME"
-        c.description 'Creates a new Jekyll theme scaffold'
+        c.description "Creates a new Jekyll theme scaffold"
 
         c.action do |args, _|
           Jekyll::Commands::NewTheme.process(args)
@@ -14,7 +14,7 @@ class Jekyll::Commands::NewTheme < Jekyll::Command
     end
 
     def process(args)
-      raise InvalidThemeName, 'You must specify a theme name.' if args.empty?
+      raise Jekyll::Errors::InvalidThemeName, "You must specify a theme name." if args.empty?
 
       new_theme_name = args.join("_")
       theme = Jekyll::ThemeBuilder.new(new_theme_name)
@@ -23,7 +23,8 @@ class Jekyll::Commands::NewTheme < Jekyll::Command
       end
 
       theme.create!
-      Jekyll.logger.info "Your new Jekyll theme, #{theme.name}, is ready for you in #{theme.path}!"
+      Jekyll.logger.info "Your new Jekyll theme, #{theme.name}," \
+        " is ready for you in #{theme.path}!"
       Jekyll.logger.info "For help getting started, read #{theme.path}/README.md."
     end
   end

lib/jekyll/errors.rb

@@ -2,6 +2,8 @@ module Jekyll
   module Errors
     FatalException = Class.new(::RuntimeError)
 
+    InvalidThemeName = Class.new(FatalException)
+
     DropMutationException       = Class.new(FatalException)
     InvalidPermalinkError       = Class.new(FatalException)
     InvalidYAMLFrontMatterError = Class.new(FatalException)

lib/jekyll/theme_builder.rb

@@ -1,12 +1,12 @@
 class Jekyll::ThemeBuilder
-  SCAFFOLD_DIRECTORIES = %w{
+  SCAFFOLD_DIRECTORIES = %w(
     _layouts _includes _sass
-  }.freeze
+  ).freeze
 
   attr_reader :name, :path
 
   def initialize(theme_name)
-    @name = theme_name.to_s.gsub(/ /, "_").gsub(/_+/, "_")
+    @name = theme_name.to_s.tr(" ", "_").gsub(/_+/, "_")
     @path = Pathname.new(File.expand_path(name, Dir.pwd))
   end
 
@@ -26,10 +26,8 @@ class Jekyll::ThemeBuilder
   def template_file(filename)
     [
       root.join("theme_template", "#{filename}.erb"),
-      root.join("theme_template", "#{filename}")
+      root.join("theme_template", filename.to_s)
-    ].find do |pathname|
+    ].find(&:exist?)
-      pathname.exist?
-    end
   end
 
   def template(filename)
@@ -43,14 +41,14 @@ class Jekyll::ThemeBuilder
   def mkdir_p(directories)
     Array(directories).each do |directory|
       full_path = path.join(directory)
-      Jekyll.logger.info "create", "#{full_path}"
+      Jekyll.logger.info "create", full_path.to_s
       FileUtils.mkdir_p(full_path)
     end
   end
 
   def write_file(filename, contents)
     full_path = path.join(filename)
-    Jekyll.logger.info "create", "#{full_path}"
+    Jekyll.logger.info "create", full_path.to_s
     File.write(full_path, contents)
   end
 
@@ -64,13 +62,13 @@ class Jekyll::ThemeBuilder
   end
 
   def create_accessories
-    %w{README.md CODE_OF_CONDUCT.md LICENSE.txt}.each do |filename|
+    %w(README.md CODE_OF_CONDUCT.md LICENSE.txt).each do |filename|
       write_file(filename, template(filename))
     end
   end
 
   def initialize_git_repo
-    Jekyll.logger.info "initialize", "#{path.join(".git")}"
+    Jekyll.logger.info "initialize", path.join(".git").to_s
     Dir.chdir(path.to_s) { `git init` }
   end
 

lib/theme_template/CODE_OF_CONDUCT.md.erb

@@ -0,0 +1,74 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+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.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at <%= user_email %>. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

lib/theme_template/README.md.erb

@@ -0,0 +1,40 @@
+# <%= theme_name %>
+
+Welcome to your new Jekyll theme! In this directory, you'll find the files you need to be able to package up your theme into a gem. Put your layouts in `_layouts`, your includes in `_includes` and your sass in `_sass`. To experiment with this code, add some sample content and run `bundle exec jekyll serve` – this directory is setup just like a Jekyll site!
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your Jekyll site's Gemfile:
+
+```ruby
+gem <%= theme_name.inspect %>
+```
+
+And add this line to your Jekyll site:
+
+```yaml
+theme: <%= theme_name %>
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install <%= theme_name %>
+
+## Usage
+
+TODO: Write usage instructions here. Describe your available layouts, includes, and/or sass.
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/hello. 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 theme is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+