Add more template files and add a ThemeBuilder which can create the site

lib/jekyll.rb

@@ -68,6 +68,7 @@ module Jekyll
   autoload :StaticFile,          'jekyll/static_file'
   autoload :Stevenson,           'jekyll/stevenson'
   autoload :Theme,               'jekyll/theme'
+  autoload :ThemeBuilder,        'jekyll/theme_builder'
   autoload :URL,                 'jekyll/url'
   autoload :Utils,               'jekyll/utils'
   autoload :VERSION,             'jekyll/version'

lib/jekyll/commands/new_theme.rb

@@ -1,82 +1,30 @@
 require 'erb'
 
-module Jekyll
-  module Commands
-    class NewTheme < Command
-      class << self
-        def init_with_program(prog)
-          prog.command(:"new-theme") do |c|
-            c.syntax 'new-theme NAME'
-            c.description 'Creates a new Jekyll theme scaffold'
-
-            c.action do |args, _|
-              Jekyll::Commands::NewTheme.process(args)
-            end
-          end
-        end
-
-        def process(args)
-          raise InvalidThemeName, 'You must specify a theme name.' if args.empty?
-
-          new_theme_name = args.join("_")
-          theme = ThemeBuilder.new(new_theme_name)
-          if theme.path.exist?
-            Jekyll.logger.abort_with "Conflict:", "#{theme.path} already exists."
-          end
-
-          theme.create!
-          Jekyll.logger.info "Your new Jekyll theme, #{theme.name} is ready for you in #{theme.path}."
+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.description 'Creates a new Jekyll theme scaffold'
+
+        c.action do |args, _|
+          Jekyll::Commands::NewTheme.process(args)
         end
+      end
+    end
 
-        class ThemeBuilder
-          attr_reader :name, :path
-          def initialize(theme_name)
-            @name = theme_name
-            @path = Pathname.new(File.expand_path(theme_name, Dir.pwd))
-          end
-
-          def create!
-            create_directories
-            create_gemspec
-            create_readme
-          end
-
-          private
-
-          def create_directories
-            Dir.chdir(path) do
-              FileUtils.mkdir_p(%w{_includes _layouts _sass})
-            end
-          end
-        end
-
-        private
-
-        def gemfile_contents
-          <<-RUBY
-source "https://rubygems.org"
-
-# Hello! This is where you manage which Jekyll version is used to run.
-# When you want to use a different version, change it below, save the
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
-gem "jekyll", "#{Jekyll::VERSION}"
-
-# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
-# uncomment the line below. To upgrade, run `bundle update github-pages`.
-# gem "github-pages", group: :jekyll_plugins
+    def process(args)
+      raise InvalidThemeName, 'You must specify a theme name.' if args.empty?
 
-# If you have any plugins, put them here!
-# group :jekyll_plugins do
-#   gem "jekyll-github-metadata", "~> 1.0"
-# end
-RUBY
-        end
+      new_theme_name = args.join("_")
+      theme = Jekyll::ThemeBuilder.new(new_theme_name)
+      if theme.path.exist?
+        Jekyll.logger.abort_with "Conflict:", "#{theme.path} already exists."
       end
+
+      theme.create!
+      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
 end

lib/jekyll/theme_builder.rb

@@ -0,0 +1,108 @@
+class Jekyll::ThemeBuilder
+  SCAFFOLD_DIRECTORIES = %w{
+    _layouts _includes _sass
+  }.freeze
+
+  attr_reader :name, :path
+
+  def initialize(theme_name)
+    @name = theme_name.to_s.gsub(/ /, "_").gsub(/_+/, "_")
+    @path = Pathname.new(File.expand_path(name, Dir.pwd))
+  end
+
+  def create!
+    create_directories
+    create_gemspec
+    create_accessories
+    initialize_git_repo
+  end
+
+  private
+
+  def root
+    @root ||= Pathname.new(File.expand_path("../", __dir__))
+  end
+
+  def template_file(filename)
+    [
+      root.join("theme_template", "#{filename}.erb"),
+      root.join("theme_template", "#{filename}")
+    ].find do |pathname|
+      pathname.exist?
+    end
+  end
+
+  def template(filename)
+    erb.render(template_file(filename).read)
+  end
+
+  def erb
+    @erb ||= ERBRenderer.new(self)
+  end
+
+  def mkdir_p(directories)
+    Array(directories).each do |directory|
+      full_path = path.join(directory)
+      Jekyll.logger.info "create", "#{full_path}"
+      FileUtils.mkdir_p(full_path)
+    end
+  end
+
+  def write_file(filename, contents)
+    full_path = path.join(filename)
+    Jekyll.logger.info "create", "#{full_path}"
+    File.write(full_path, contents)
+  end
+
+  def create_directories
+    mkdir_p(SCAFFOLD_DIRECTORIES)
+  end
+
+  def create_gemspec
+    write_file("Gemfile", template("Gemfile"))
+    write_file("#{name}.gemspec", template("theme.gemspec"))
+  end
+
+  def create_accessories
+    %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")}"
+    Dir.chdir(path.to_s) { `git init` }
+  end
+
+  def user_name
+    @user_name ||= `git config user.name`.chomp
+  end
+
+  def user_email
+    @user_email ||= `git config user.email`.chomp
+  end
+
+  class ERBRenderer
+    extend Forwardable
+
+    def_delegator :@theme_builder, :name, :theme_name
+    def_delegator :@theme_builder, :user_name, :user_name
+    def_delegator :@theme_builder, :user_email, :user_email
+
+    def initialize(theme_builder)
+      @theme_builder = theme_builder
+    end
+
+    def jekyll_pessimistic_version
+      Jekyll::VERSION.split(".").take(2).join(".")
+    end
+
+    def theme_directories
+      SCAFFOLD_DIRECTORIES
+    end
+
+    def render(contents)
+      ERB.new(contents).result binding
+    end
+  end
+end

lib/theme_template/Gemfile

@@ -0,0 +1,2 @@
+source "https://rubygems.org"
+gemspec

lib/theme_template/LICENSE.txt.erb

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 <%= user_name %>
+
+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.

lib/theme_template/theme.gemspec.erb

@@ -0,0 +1,21 @@
+# coding: utf-8
+
+Gem::Specification.new do |spec|
+  spec.name          = <%= theme_name.inspect %>
+  spec.version       = "0.1.0"
+  spec.authors       = [<%= user_name.inspect %>]
+  spec.email         = [<%= user_email.inspect %>]
+
+  spec.summary       = %q{TODO: Write a short summary, because Rubygems requires one.}
+  spec.description   = %q{TODO: Write a longer description or delete this line.}
+  spec.homepage      = "TODO: Put your gem's website or public repo URL here."
+  spec.license       = "MIT"
+
+  spec.metadata["jekyll"] = { "theme" => true }
+
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(exe|<%= theme_directories.join("|") %>)/}) }
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+
+  spec.add_development_dependency "jekyll", "~> <%= jekyll_pessimistic_version %>"
+end