Refactored CLI using thor, improving usability by miles

app-store-emigrant.gemspec

@@ -23,6 +23,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'rubyzip',        '~> 0.9'
   s.add_dependency 'rainbow',        '~> 1.1'
   s.add_dependency 'CFPropertyList', '~> 2.0'
+  s.add_dependency 'thor',           '~> 0.16.0'
 
   s.add_development_dependency 'rake'
 

bin/ase

@@ -2,4 +2,4 @@
 
 require 'app-store-emigrant'
 
-AppStore::Emigrant::CLI.new ARGV
+AppStore::Emigrant::CLI.start

lib/app-store-emigrant/cli.rb

@@ -1,44 +1,89 @@
+# encoding: utf-8
+
 require 'rainbow'
+require 'thor'
 
 module AppStore; end
 
 module AppStore::Emigrant
 
   # Represents the command line interface
-  class CLI
+  class CLI < Thor
 
-    # Initializes CLI instance with given arguments
-    def initialize args
+    desc 'scan [LIBRARY PATH]', 'Scans an iTunes library and reports which of its mobile applications are out of date'
+    method_option :clear_cache, :type => :boolean, :default => false, :aliases => '-c', :desc => 'Clears application cache prior to scanning'
+    def scan path = nil
 
-      # Extract the path (if any)
-      path, = args
+      # Ensure all output is immediately flushed
+      $stdout.sync = true
 
       # Use the default library on this system when no path is specified
       library = path ? Library.new(path) : Library.default
 
-      # Load cloud data in bulk
+      # Clear cache if requested
+      if options[:clear_cache]
+        Cache.clear!
+      end
+
+      # Verify cache integrity
+      puts 'Verifying cache integrity..'
+
+      # Forcefully cache metadata for each application that is not yet cached
+      library.apps.each do |app|
+
+        unless app.cached?
+          begin
+            app.cache!
+            puts " + #{app.name} v#{app.version}"
+          rescue App::Invalid => e
+            puts " ! Cannot cache #{app.filename}: #{e.message}".foreground(:red).bright
+          end
+        end
+
+      end
+
+      # Print cache statistics
+      puts "Done. Currently caching #{Cache.count} applications on your system."
+
+      puts
+
+      # Since all apps are cached, load cloud data in bulk
       library.clouddata!
 
+      # Print library statistics
+      puts "Your library contains #{library.valid_apps.length} valid applications, of which #{library.outdated_apps.length} are outdated:"
+
       # Loop through all applications
       library.apps.each do |app|
 
         if app.valid?
 
-          # Print their name, version and whether it's outdated
-          print app.name + ' @ ' + "v#{app.version}".foreground(app.outdated? ? :red : :green)
+          # Generate color-coded version
+          version = "v#{app.version}".foreground(app.outdated? ? :red : :green)
+          if app.outdated?
+            version = version.bright
+          end
+
+          # Print application name, version and whether it's outdated
+          print " · #{app.name} #{version}"
           if app.outdated?
-            print " (v#{app.cloudversion} available in the cloud)"
+            print " · v#{app.cloudversion} available".foreground(:white)
           end
+
+          puts
         else
-          print app.filename + ' is invalid (metadata, id or name missing)'
+          puts " ! #{app.filename} is invalid (metadata, id or name missing)".foreground(:red).bright
         end
 
-        puts
-
       end
 
     end
 
+    desc 'version', 'Prints version information'
+    def version
+      puts "App Store Emigrant v#{AppStore::Emigrant::VERSION}"
+    end
+
   end
 
 end