Implement theme installer v 0.1.0

Rakefile

@@ -1,14 +1,43 @@
 require "rubygems"
 require 'rake'
+require 'yaml'
 
 SOURCE = "."
 CONFIG = {
   'themes' => File.join(SOURCE, "_includes", "themes"),
   'layouts' => File.join(SOURCE, "_layouts"),
   'posts' => File.join(SOURCE, "_posts"),
-  'post_ext' => "md"
+  'post_ext' => "md",
+  'theme_package_version' => "0.1.0"
 }
 
+# Path configuration helper
+module JB
+  class Path
+    SOURCE = "."
+    Paths = {
+      :layouts => "_layouts",
+      :themes => "_includes/themes",
+      :theme_assets => "assets/themes",
+      :theme_packages => "_theme_packages",
+      :posts => "_posts"
+    }
+
+    def self.base
+      SOURCE
+    end
+
+    # build a path relative to configured path settings.
+    def self.build(path, opts = {})
+      opts[:root] ||= SOURCE
+      path = "#{opts[:root]}/#{Paths[path.to_sym]}/#{opts[:node]}".split("/")
+      path.compact!
+      File.__send__ :join, path
+    end
+
+  end #Path
+end #JB
+
 # Usage: rake post title="A Title"
 desc "Begin a new post in #{CONFIG['posts']}"
 task :post do
@@ -92,6 +121,76 @@ task :preview do
   system "jekyll --auto --server"
 end # task :preview
 
+namespace :theme do
+
+  # 0.1.0 version of theme install will be simple 1:1 file matching.
+  desc "Install theme"
+  task :install do
+    name = ENV["name"].to_s.downcase
+    packaged_theme_path = JB::Path.build(:theme_packages, :node => name)
+
+    abort("rake aborted: name cannot be blank") if name.empty?
+    abort("rake aborted: '#{packaged_theme_path}' directory not found.") unless FileTest.directory?(packaged_theme_path)
+
+    # Get relative paths to packaged theme files
+    packaged_theme_files = []
+    FileUtils.cd(packaged_theme_path) { packaged_theme_files += Dir["**/*.*"] }
+    # Don't install metadata files.
+    packaged_theme_files.delete_if { |f| f =~ /^(manifest|readme|packager)/i }
+
+    # Mirror each file into the framework making sure to prompt if already exists.
+    packaged_theme_files.each do |filename|
+      file_install_path = File.join(JB::Path.base, filename)
+      if File.exist? file_install_path
+        next if ask("#{file_install_path} already exists. Do you want to overwrite?", ['y', 'n']) == 'n'
+      else
+        mkdir_p File.dirname(file_install_path)
+        cp_r File.join(packaged_theme_path, filename), file_install_path
+      end
+    end
+
+    puts "=> #{name} theme has been installed!"
+    puts "=> ---"
+    if ask("=> Want to switch themes now?", ['y', 'n']) == 'y'
+      system("rake switch_theme name='#{name}'")
+    end
+  end
+
+  # The 0.1.0 version of theme packaging will be simple 1:1 file matching.
+  # The theme repo will outline it's files in the same structure 
+  # it expects to be included into the Jekyll structure.
+  desc "Package theme"
+  task :package do
+    name = ENV["name"].to_s.downcase
+    theme_path = JB::Path.build(:themes, :node => name)
+    asset_path = JB::Path.build(:theme_assets, :node => name)
+
+    abort("rake aborted: name cannot be blank") if name.empty?
+    abort("rake aborted: '#{theme_path}' directory not found.") unless FileTest.directory?(theme_path)
+    abort("rake aborted: '#{asset_path}' directory not found.") unless FileTest.directory?(asset_path)
+
+    ## Mirror theme's template directory (_includes)
+    packaged_theme_path = JB::Path.build(:themes, :root => JB::Path.build(:theme_packages, :node => name))
+    mkdir_p packaged_theme_path
+    cp_r theme_path, packaged_theme_path
+
+    ## Mirror theme's asset directory
+    packaged_theme_assets_path = JB::Path.build(:theme_assets, :root => JB::Path.build(:theme_packages, :node => name))
+    mkdir_p packaged_theme_assets_path
+    cp_r asset_path, packaged_theme_assets_path
+
+    ## Log packager version
+    packager = {"packager" => {"version" => CONFIG["theme_package_version"].to_s } }
+    open(JB::Path.build(:theme_packages, :node => "#{name}/packager.yml"), "w") do |page|
+      page.puts packager.to_yaml
+    end
+
+    puts "=> '#{name}' theme is packaged and available at: #{JB::Path.build(:theme_packages, :node => name)}"
+  end
+
+end # end namespace :theme
+
+
 def ask(message, valid_options)
   if valid_options
     answer = get_stdin("#{message} #{valid_options.to_s.gsub(/"/, '').gsub(/, /,'/')} ") while !valid_options.include?(answer)