[UserInterface] First attempt to extract UI Logic.

CHANGELOG.md

+## 0.15.0 (unreleased)
+
+[CocoaPods](https://github.com/CocoaPods/CocoaPods/compare/master...b0.15.0)
+
+###### Enhancements
+
+- Support for `header_mappings_dir` attribute in subspecs.
+- Refactored UI.
+
 ## 0.14.0.rc2
 
 [CocoaPods](https://github.com/CocoaPods/CocoaPods/compare/0.14.0.rc1...0.14.0.rc2)

lib/cocoapods.rb

@@ -41,6 +41,7 @@ module Pod
   autoload :Source,                 'cocoapods/source'
   autoload :Spec,                   'cocoapods/specification'
   autoload :Specification,          'cocoapods/specification'
+  autoload :UserInterface,          'cocoapods/user_interface'
   autoload :Version,                'cocoapods/version'
 
   autoload :Pathname,               'pathname'

lib/cocoapods/downloader/git.rb

@@ -7,14 +7,15 @@ module Pod
   class Downloader
     class Git < Downloader
       include Config::Mixin
+      include UserInterface::Mixin
+
       executable :git
 
       MAX_CACHE_SIZE = 500
 
       def download
         create_cache unless cache_exist?
-        puts '-> Cloning git repo' if config.verbose?
-
+        ui_title(' > Cloning git repo', '', 3) do
           if options[:tag]
             download_tag
           elsif options[:branch]
@@ -24,13 +25,13 @@ module Pod
           else
             download_head
           end
-
           Dir.chdir(target_path) { git! "submodule update --init"  } if options[:submodules]
+        end
         prune_cache
       end
 
       def create_cache
-        puts "-> Creating cache git repo (#{cache_path})" if config.verbose?
+        ui_title " > Creating cache git repo (#{cache_path})"
         cache_path.rmtree if cache_path.exist?
         cache_path.mkpath
         clone(url, cache_path)
@@ -42,7 +43,7 @@ module Pod
           repos = Pathname.new(caches_dir).children.select { |c| c.directory? }.sort_by(&:ctime)
           while caches_size >= MAX_CACHE_SIZE && !repos.empty?
             dir = repos.shift
-            puts '->'.yellow << " Removing git cache for `#{origin_url(dir)}'" if config.verbose?
+            ui_message "#{'->'.yellow} Removing git cache for `#{origin_url(dir)}'"
             dir.rmtree
           end
         end
@@ -74,7 +75,7 @@ module Pod
       end
 
       def update_cache
-        puts "-> Updating cache git repo (#{cache_path})" if config.verbose?
+        ui_title " > Updating cache git repo (#{cache_path})"
         Dir.chdir(cache_path) do
           git! "reset --hard HEAD"
           git! "clean -d -x -f"
@@ -138,7 +139,7 @@ module Pod
           git! "remote add upstream '#{@url}'" # we need to add the original url, not the cache url
           git! "fetch -q upstream" # refresh the branches
           git! "checkout --track -b activated-pod-commit upstream/#{options[:branch]}" # create a new tracking branch
-          puts "Just downloaded and checked out branch: #{options[:branch]} from upstream #{clone_url}" if config.verbose?
+          ui_message("Just downloaded and checked out branch: #{options[:branch]} from upstream #{clone_url}")
         end
       end
 

lib/cocoapods/downloader/http.rb

@@ -16,10 +16,11 @@ module Pod
       def download
         @filename        = filename_with_type type
         @download_path   = target_path + @filename
-
+        ui_title(' > Downloading from HTTP', '', 3) do
           download_file @download_path
           extract_with_type @download_path, type
         end
+      end
 
       def type
         options[:type] || type_with_url(url)

lib/cocoapods/downloader/mercurial.rb

@@ -4,12 +4,14 @@ module Pod
       executable :hg
 
       def download
+        ui_title(' > Cloning mercurial repo', '', 3) do
           if options[:revision]
             download_revision
           else
             download_head
           end
         end
+      end
 
       def download_head
         hg! "clone \"#{url}\" \"#{target_path}\""

lib/cocoapods/downloader/subversion.rb

@@ -8,12 +8,16 @@ module Pod
       end
 
       def download
+        ui_title(' > Exporting subversion repo', '', 3) do
           svn! %|export "#{reference_url}" "#{target_path}"|
         end
+      end
 
       def download_head
+        ui_title(' > Exporting subversion repo', '', 3) do
           svn! %|export "#{trunk_url}" "#{target_path}"|
         end
+      end
 
       def reference_url
         result = url.dup

lib/cocoapods/executable.rb

@@ -2,13 +2,17 @@ require 'open4'
 
 module Pod
   module Executable
+
     class Indenter < ::Array
+      include UserInterface::Mixin
+      include Config::Mixin
+
       attr_accessor :indent
       attr_accessor :io
 
-      def initialize(io = nil, indent = '   ')
+      def initialize(io = nil)
         @io = io
-        @indent = indent
+        @indent = ' ' * UserInterface.instance.indentation_level
       end
 
       def <<(value)
@@ -19,6 +23,7 @@ module Pod
     end
 
     def executable(name)
+      include UserInterface::Mixin
       bin = `which #{name}`.strip
       base_method = "base_" << name.to_s
       define_method(base_method) do |command, should_raise|
@@ -27,20 +32,19 @@ module Pod
         end
         full_command = "#{bin} #{command}"
         if Config.instance.verbose?
-          puts "   $ #{full_command}"
+          ui_message("$ #{full_command}")
           stdout, stderr = Indenter.new(STDOUT), Indenter.new(STDERR)
         else
           stdout, stderr = Indenter.new, Indenter.new
         end
         status = Open4.spawn(full_command, :stdout => stdout, :stderr => stderr, :status => true)
-        # TODO not sure that we should be silent in case of a failure.
 
         output = stdout.join("\n") + stderr.join("\n") # TODO will this suffice?
         unless status.success?
           if should_raise
             raise Informative, "#{name} #{command}\n\n#{output}"
           else
-            puts((Config.instance.verbose? ? '   ' : '') << "[!] Failed: #{full_command}".red) unless Config.instance.silent?
+            ui_message("[!] Failed: #{full_command}".red)
           end
         end
         output

lib/cocoapods/installer.rb

@@ -6,6 +6,7 @@ module Pod
     autoload :UserProjectIntegrator, 'cocoapods/installer/user_project_integrator'
 
     include Config::Mixin
+    include UserInterface::Mixin
 
     attr_reader :resolver, :sandbox, :lockfile
 
@@ -49,13 +50,8 @@ module Pod
     def install_dependencies!
       pods.sort_by { |pod| pod.top_specification.name.downcase }.each do |pod|
         should_install = @resolver.should_install?(pod.top_specification.name) || !pod.exists?
-
-        unless config.silent?
-          marker = config.verbose ? "\n-> ".green : ''
-          puts marker << ( should_install ? "Installing #{pod}".green : "Using #{pod}" )
-        end
-
         if should_install
+          ui_title("Installing #{pod}".green, "-> ".green) do
             unless pod.downloaded?
               pod.implode
               download_pod(pod)
@@ -67,6 +63,9 @@ module Pod
             # pre-downloaded in AbstractExternalSource#specification_from_sandbox.
             pod.clean! if config.clean?
           end
+        else
+          ui_title("Using #{pod}", "-> ".green)
+        end
       end
     end
 
@@ -89,10 +88,10 @@ module Pod
     def generate_docs(pod)
       doc_generator = Generator::Documentation.new(pod)
       if ( config.generate_docs? && !doc_generator.already_installed? )
-        puts "-> Installing documentation" if config.verbose?
+        ui_title " > Installing documentation"
         doc_generator.generate(config.doc_install?)
       else
-        puts "-> Using existing documentation" if config.verbose?
+        ui_title " > Using existing documentation"
       end
     end
 
@@ -100,48 +99,47 @@ module Pod
     #
     def remove_deleted_dependencies!
       resolver.removed_pods.each do |pod_name|
-        marker = config.verbose ? "\n-> ".red : ''
+        ui_title("Removing #{pod_name}", "-> ".red) do
           path = sandbox.root + pod_name
-        puts marker << "Removing #{pod_name}".red
           path.rmtree if path.exist?
         end
       end
+    end
 
     def install!
       @sandbox.prepare_for_install
-
-      print_title "Resolving dependencies of: #{@podfile.defined_in_file}"
+      ui_title "Resolving dependencies of `#{@podfile.defined_in_file}'" do
         specs_by_target
+      end
 
-      print_title "Removing deleted dependencies" unless resolver.removed_pods.empty?
+      ui_title "Removing deleted dependencies" do
         remove_deleted_dependencies!
+      end unless resolver.removed_pods.empty?
 
-      print_title "Installing dependencies"
+      ui_title "Installing dependencies" do
         install_dependencies!
-
-      print_title("Generating support files\n", false)
-      target_installers.each do |target_installer|
-        pods_for_target = pods_by_target[target_installer.target_definition]
-        target_installer.install!(pods_for_target, @sandbox)
-        acknowledgements_path = target_installer.target_definition.acknowledgements_path
-        Generator::Acknowledgements.new(target_installer.target_definition,
-                                        pods_for_target).save_as(acknowledgements_path)
-        generate_dummy_source(target_installer)
       end
 
-      puts "- Running post install hooks" if config.verbose?
+      ui_title("Generating support files", '', 2) do
+        generate_target_support_files
+
+        ui_message "- Running post install hooks" do
           # Post install hooks run _before_ saving of project, so that they can alter it before saving.
           run_post_install_hooks
+        end
 
-      puts "- Writing Xcode project file to `#{@sandbox.project_path}'" if config.verbose?
+        ui_message "- Writing Xcode project file to `#{@sandbox.project_path}'" do
           project.save_as(@sandbox.project_path)
+        end
 
-      puts "- Writing lockfile in `#{config.project_lockfile}'\n\n" if config.verbose?
+        ui_message "- Writing lockfile in `#{config.project_lockfile}'" do
           @lockfile = Lockfile.generate(@podfile, specs_by_target.values.flatten)
           @lockfile.write_to_disk(config.project_lockfile)
+        end
 
         UserProjectIntegrator.new(@podfile).integrate! if config.integrate_targets?
       end
+    end
 
     def run_post_install_hooks
       # we loop over target installers instead of pods, because we yield the target installer
@@ -155,6 +153,17 @@ module Pod
       @podfile.post_install!(self)
     end
 
+    def generate_target_support_files
+      target_installers.each do |target_installer|
+        pods_for_target = pods_by_target[target_installer.target_definition]
+        target_installer.install!(pods_for_target, @sandbox)
+        acknowledgements_path = target_installer.target_definition.acknowledgements_path
+        Generator::Acknowledgements.new(target_installer.target_definition,
+                                        pods_for_target).save_as(acknowledgements_path)
+        generate_dummy_source(target_installer)
+      end
+    end
+
     def generate_dummy_source(target_installer)
       class_name_identifier = target_installer.target_definition.label
       dummy_source = Generator::DummySource.new(class_name_identifier)
@@ -198,15 +207,5 @@ module Pod
       end
       result
     end
-
-    private
-
-    def print_title(title, only_verbose = true)
-      if config.verbose?
-        puts "\n" + title.yellow
-      elsif !config.silent? && !only_verbose
-        puts title
-      end
-    end
   end
 end

lib/cocoapods/installer/target_installer.rb

@@ -2,6 +2,7 @@ module Pod
   class Installer
     class TargetInstaller
       include Config::Mixin
+      include UserInterface::Mixin
 
       attr_reader :podfile, :project, :target_definition, :target
       attr_accessor :requires_arc
@@ -97,21 +98,25 @@ module Pod
       end
 
       def create_files(pods, sandbox)
-        if @podfile.generate_bridge_support?
         bridge_support_metadata_path = sandbox.root + @target_definition.bridge_support_name
-          puts "- Generating BridgeSupport metadata file at `#{bridge_support_metadata_path}'" if config.verbose?
+        ui_message "- Generating BridgeSupport metadata file at `#{bridge_support_metadata_path}'" do
           bridge_support_generator_for(pods, sandbox).save_as(bridge_support_metadata_path)
           copy_resources_script_for(pods).resources << @target_definition.bridge_support_name
-        end
-        puts "- Generating xcconfig file at `#{sandbox.root + @target_definition.xcconfig_name}'" if config.verbose?
+        end if @podfile.generate_bridge_support?
+
+        ui_message "- Generating xcconfig file at `#{sandbox.root + @target_definition.xcconfig_name}'" do
           xcconfig.save_as(sandbox.root + @target_definition.xcconfig_name)
           @target_definition.xcconfig = xcconfig
+        end
 
-        puts "- Generating prefix header at `#{sandbox.root + @target_definition.prefix_header_name}'" if config.verbose?
+        ui_message "- Generating prefix header at `#{sandbox.root + @target_definition.prefix_header_name}'" do
           save_prefix_header_as(sandbox.root + @target_definition.prefix_header_name, pods)
-        puts "- Generating copy resources script at `#{sandbox.root + @target_definition.copy_resources_script_name}'" if config.verbose?
+        end
+
+        ui_message "- Generating copy resources script at `#{sandbox.root + @target_definition.copy_resources_script_name}'" do
           copy_resources_script_for(pods).save_as(sandbox.root + @target_definition.copy_resources_script_name)
         end
+      end
 
       private
 

lib/cocoapods/resolver.rb

@@ -3,6 +3,7 @@ require 'colored'
 module Pod
   class Resolver
     include Config::Mixin
+    include UserInterface::Mixin
 
     # @return [Bool] Whether the resolver should find the pods to install or
     #   the pods to update.
@@ -66,37 +67,27 @@ module Pod
       @specs_by_target = {}
       @pods_from_external_sources = []
       @pods_to_lock = []
-      @log_indent = 0
 
       if @lockfile
-        puts "\nFinding added, modified or removed dependencies:".green if config.verbose?
         @pods_by_state = @lockfile.detect_changes_with_podfile(podfile)
-        if config.verbose?
+        ui_title "Finding added, modified or removed dependencies:" do
+          marks = {:added => "A".green, :changed => "M".yellow, :removed => "R".red, :unchanged => "-" }
           @pods_by_state.each do |symbol, pod_names|
-            case symbol
-            when :added
-              mark = "A".green
-            when :changed
-              mark = "M".yellow
-            when :removed
-              mark = "R".red
-            when :unchanged
-              mark = "-"
-            end
             pod_names.each do |pod_name|
-              puts "  #{mark} " << pod_name
-            end
+              ui_message("#{marks[symbol]} #{pod_name}", '',2)
             end
           end
+        end if config.verbose?
         @pods_to_lock = (lockfile.pods_names - @pods_by_state[:added] - @pods_by_state[:changed] - @pods_by_state[:removed]).uniq
       end
 
       @podfile.target_definitions.values.each do |target_definition|
-        puts "\nResolving dependencies for target `#{target_definition.name}' (#{target_definition.platform}):".green if config.verbose?
+        ui_title "Resolving dependencies for target `#{target_definition.name}' (#{target_definition.platform}):" do
           @loaded_specs = []
           find_dependency_specs(@podfile, target_definition.dependencies, target_definition)
           @specs_by_target[target_definition] = @cached_specs.values_at(*@loaded_specs).sort_by(&:name)
         end
+      end
 
       @cached_specs.values.sort_by(&:name)
       @specs_by_target
@@ -187,14 +178,12 @@ module Pod
     # @return [void]
     #
     def find_dependency_specs(dependent_specification, dependencies, target_definition)
-      @log_indent += 1
       dependencies.each do |dependency|
         # Replace the dependency with a more specific one if the pod is already installed.
         if !update_mode && @pods_to_lock.include?(dependency.name)
           dependency = lockfile.dependency_for_installed_pod_named(dependency.name)
         end
-
-        puts '  ' * @log_indent + "- #{dependency}" if config.verbose?
+        ui_message("- #{dependency}", '', 2) do
           set = find_cached_set(dependency, target_definition.platform)
           set.required_by(dependency, dependent_specification.to_s)
 
@@ -212,7 +201,7 @@ module Pod
           end
           validate_platform(spec || @cached_specs[dependency.name], target_definition)
         end
-      @log_indent -= 1
+      end
     end
 
     # Ensures that a spec is compatible with platform of a target.

lib/cocoapods/user_interface.rb

+module Pod
+  class UserInterface
+    include Config::Mixin
+
+    def self.instance
+      @instance ||= new
+    end
+
+    def initialize
+      @indentation_level = 0
+      @title_level = 0
+      @title_colors = %w|yellow green|
+    end
+
+    attr_accessor :indentation_level, :title_level
+
+    def title(title, verbose_prefix = '')
+      if config.verbose?
+        title = "\n#{title}" if @title_level < 2
+        title = verbose_prefix + title if config.verbose?
+        if (color = @title_colors[@title_level])
+        title = title.send(color)
+        end
+        puts "#{title}"
+      elsif title_level < 2
+        puts title
+      end
+    end
+
+    def message(message,  verbose_prefix = '')
+      message = verbose_prefix + message if config.verbose?
+      puts_indented message if config.verbose?
+    end
+
+    def puts(message)
+      super(message) unless config.silent?
+    end
+
+    def puts_indented(message)
+      indented = wrap_string(message, " " * indentation_level)
+      puts(indented)
+    end
+
+    # adapted from http://blog.macromates.com/2006/wrapping-text-with-regular-expressions/
+    def wrap_string(txt, indent)
+      width = `stty size`.split(' ')[1].to_i - indent.length
+      txt.strip.gsub(/(.{1,#{width}})( +|$)\n?|(.{#{width}})/, indent + "\\1\\3\n")
+    end
+
+    module Mixin
+      def ui_title(title, verbose_prefix = '', relative_indentation = 0)
+        UserInterface.instance.title(title)
+        UserInterface.instance.indentation_level += relative_indentation
+        UserInterface.instance.title_level += 1
+        yield if block_given?
+        UserInterface.instance.indentation_level -= relative_indentation
+        UserInterface.instance.title_level -= 1
+      end
+
+      def ui_message(message,  verbose_prefix = '', relative_indentation = 0)
+        UserInterface.instance.indentation_level += relative_indentation
+        UserInterface.instance.message(message)
+        yield if block_given?
+        UserInterface.instance.indentation_level -= relative_indentation
+      end
+
+      def ui_verbose(message)
+        UserInterface.instance.puts(message)
+      end
+
+      # def ui_progress_start(count)
+      # end
+
+      # def ui_progress_increase(message = nil, ammount = 1)
+      # end
+
+      # def ui_progress_complete()
+      # end
+
+    end
+  end
+end