docs: add code level documentation

Author: Soumya Mahunt

lib/cocoapods-embed-flutter/flutter/dependency.rb

@@ -2,9 +2,37 @@
 
 module Flutter
   module Pub
+    # Provides a DSL to describe a flutter dependency. A dependency is defined in
+    # `pubspec.yaml` in  `dependencies` or `dev_dependencies` sections.
+    #
     class Dependency
-      attr_reader :name, :requirements, :parent_spec, :is_dev_dependency
+      # @return [String] the name of the dependency.
+      #
+      attr_reader :name
+      # @return [String, Hash] the requirements for
+      #          dependency as declred in parent `pubspec`.
+      #
+      attr_reader :requirements
+      # @return [Spec] the parent specification where
+      #         dependency declared.
+      #
+      attr_reader :parent_spec
+      # @return [Boolean] If this specification is an app specification.
+      #
+      attr_reader :is_dev_dependency
 
+      # @param  [String] name
+      #         the name of the specification.
+      #
+      # @param [String, Hash] requirements
+      #        the requirements for dependency as declred in `pubspec`
+      #
+      # @param [Spec] parent_specification
+      #        the parent specification where dependency declared
+      #
+      # @param [Boolean] is_dev_dependency
+      #        Whether the dependency only required during development
+      #
       def initialize(name, requirements, parent_spec, dev_dependency = false)
         raise StandardError, 'A flutter dependency requires a name.' unless name
         raise StandardError, 'A flutter dependency requires a parent pubspec.' unless parent_spec.is_a?(Flutter::Pub::Spec)
@@ -14,19 +42,42 @@ def initialize(name, requirements, parent_spec, dev_dependency = false)
         @is_dev_dependency = dev_dependency
       end
 
+      # Returns dependencies from hash declared in `dependencies` or `dev_dependencies`
+      # section in `pubspec.yaml` file.
+      #
+      # @param    [Hash] hash declared in `dependencies` or `dev_dependencies`
+      #           section in `pubspec.yaml` file
+      #
+      # @param    [Spec] parent_specification
+      #           the parent specification where dependency declared
+      #
+      # @param    [Boolean] is_dev_dependency
+      #           Whether the dependency only required during development
+      #
+      # @return   [Array<Dependency>] dependencies from hash declared in `dependencies`
+      #            or `dev_dependencies` section in `pubspec.yaml` file.
+      #
       def self.create_from_hash(hash, parent_spec, dev_dependency = false)
         raise StandardError, 'A flutter dependency requires a parent pubspec.' unless parent_spec.is_a?(Flutter::Pub::Spec)
         hash.keys.map { |key| Dependency.new(key, hash[key], parent_spec, dev_dependency) }
       end
 
+      # @return [Boolean] If this dependency is a local flutter project.
+      #
       def local?
         requirements.is_a?(Hash) && requirements.include?('path')
       end
 
+      # @return [Spec] for this dependency if this dependency is a local flutter project.
+      #
       def spec
         Spec.find(name, File.expand_path(path, File.dirname(parent_spec.defined_in_file)))
       end
 
+      # Install this dependency for the parent project.
+      #
+      # @return void
+      #
       def install
         spec.setup if local?
       end

lib/cocoapods-embed-flutter/flutter/downloader.rb

@@ -21,6 +21,8 @@ module Downloader
       # @param  [Pathname,Nil] cache_path
       #         the path used to cache pod downloads.
       #
+      # @todo   Implement caching for remote sources.
+      #
       def self.download(
         request,
         target,

lib/cocoapods-embed-flutter/flutter/external_sources.rb

@@ -13,6 +13,20 @@ module ExternalSources
         :http => [:flatten, :type, :sha256, :sha1, :headers].freeze,
       }.freeze
 
+      # Returns the path to `pubspec` with the given name and location to search.
+      #
+      # @param    [String] name
+      #           the name of the project declared in `pubspec`.
+      #
+      # @param    [Hash] options
+      #           requirement opttions for the source of project.
+      #
+      # @note       the source of project can either be local or all the remotes
+      #             supported by `cocoapods-downloader`.
+      #
+      # @return   [Spec] the `pubspec` with the given name satisfying
+      #           requirement options.
+      #
       def self.fetchWithNameAndOptions(name, options)
         raise StandardError, 'A flutter module requires a name.' unless name
 

lib/cocoapods-embed-flutter/flutter/pubspec.rb

@@ -10,14 +10,41 @@ module Pub
     TOOL_DIR = '.dart_tool'.freeze
     CACHE_FILE = 'package_config.json'.freeze
 
+    # The Specification provides a DSL to describe a flutter project.
+    # A project is defined as a library originating from a source.
+    # A specification can support detailed attributes for modules of code
+    # through dependencies.
+    #
+    # Usually it is stored in `pubspec.yaml` file.
+    #
     class Spec
+      # @return [String] the path where the specification is defined, if loaded
+      #         from a file.
+      #
       attr_reader :defined_in_file
 
+      # @param  [String] path
+      #         the path to the specification.
+      #
       def initialize(path)
         @data = YAML.load_file path
         @defined_in_file = path
       end
 
+      # Returns the path to `pubspec` with the given name and location to search.
+      #
+      # @param    [String] name
+      #           the name of the project declared in `pubspec`.
+      #
+      # @param    [String] path
+      #           where project or pubspec is located.
+      #
+      # @note       either the flutter module or the `pubspec` of the flutter module
+      #             can be in the path. Optionally you can provide the `pubspec`
+      #             file directly.
+      #
+      # @return   [String] path to the `pubspec` with the given name if present.
+      #
       def self.find_file(name, path)
         path = File.expand_path(path, Dir.pwd)
 
@@ -32,6 +59,20 @@ def self.find_file(name, path)
         end
       end
 
+      # Returns the path to `pubspec` with the given name and location to search.
+      #
+      # @param    [String] name
+      #           the name of the project declared in `pubspec`.
+      #
+      # @param    [String] path
+      #           where project or pubspec is located.
+      #
+      # @note       either the flutter module or the `pubspec` of the flutter module
+      #             can be in the path. Optionally you can provide the `pubspec`
+      #             file directly.
+      #
+      # @return   [Spec] the `pubspec` with the given name if present.
+      #
       def self.find(name, path)
         pubspec_path = find_file(name, path)
         raise StandardError, "Invalid path: '#{path}' for flutter module: '#{name}'." unless pubspec_path
@@ -40,47 +81,76 @@ def self.find(name, path)
         return pubspec
       end
 
+      # @return [Boolean] If this specification is a module specification.
+      #
       def module?
         return false unless @data.include?(Flutter::NAME)
         return @data[Flutter::NAME].is_a?(Hash) && @data[Flutter::NAME].include?('module')
       end
 
+      # @return [String] the path to the flutter project.
+      #
       def project_path
         File.dirname(defined_in_file)
       end
 
+      # @return [String] the path to the flutter project
+      # dependencies cache file.
+      #
       def package_cache_path
         File.join(project_path, Pub::TOOL_DIR, Pub::CACHE_FILE)
       end
 
+      # @return [String] the path to the flutter project.
+      #
       def pod_helper_path
         File.join(project_path, '.ios', Flutter::DIR_NAME, 'podhelper.rb') if module?
       end
 
+      # @return [Array<Dependency>] the list of all the projects this
+      # specification depends upon and are included in app release.
+      #
       def dependencies
         return [] unless @data.include?('dependencies')
-        Flutter::Pub::Dependency.create_from_hash(@data['dependencies'], self)
+        Dependency.create_from_hash(@data['dependencies'], self)
       end
 
+      # @return [Array<Dependency>] the list of all the projects this
+      #         specification depends upon only during development.
+      #
       def dev_dependencies
         return [] unless @data.include?('dev_dependencies')
-        Flutter::Pub::Dependency.create_from_hash(@data['dev_dependencies'], self)
+        Dependency.create_from_hash(@data['dev_dependencies'], self)
       end
 
+      # @return [Array<Dependency>] the list of all the projects this
+      #         specification depends upon.
+      #
       def all_dependencies
         dependencies + dev_dependencies
       end
 
+      # @return [Boolean] If the flutter project for this specification
+      # has all its dependencies installed.
+      #
       def setup?
         File.exists?(package_cache_path) && (!module? || File.exists?(pod_helper_path))
       end
 
+      # Sets up the project installing all specified dependencies.
+      #
+      # @return void
+      #
       def setup
         return if setup?
         pup_get
         all_dependencies.each(&:install)
-      end 
+      end
 
+      # Runs `flutter pub get` on project directory.
+      #
+      # @return void
+      #
       def pup_get
         Dir.chdir(project_path) { |path| system('flutter pub get', exception: true) }
       end

lib/cocoapods-embed-flutter/src/pub.rb

@@ -4,7 +4,99 @@
 
 module Pod
   class Podfile
+    # The Podfile is a specification that describes the dependencies of the
+    # targets of one or more Xcode projects. With Embed Flutter
+    # it is possible to declare flutter module as dependency
+    #
+    # A Podfile can be very simple:
+    #
+    #     target 'MyApp'
+    #     pub 'flutter_module', :path => '../'
+    #
+    # An example of a more complex Podfile can be:
+    #
+    #     platform :ios, '9.0'
+    #     inhibit_all_warnings!
+    #
+    #     target 'MyApp' do
+    #       pub 'flutter_module', :path => '../'
+    #     end
+    #
+    #     target 'MyAppTests' do
+    #       pub 'flutter_module_test', :path => '../'
+    #     end
+    #
+    #     post_install do |installer|
+    #       installer.pods_project.targets.each do |target|
+    #         puts "#{target.name}"
+    #       end
+    #     end
+    #
+    #
+    # @note       Currently only one flutter module per target is
+    #             supported.
+    #
     module DSL
+      # Specifies a flutter module dependency of the project.
+      #
+      # A dependency requirement is defined by the name of the module and
+      # optionally a list of requirements.
+      #
+      #
+      # ### Using the files from a local path.
+      #
+      #  If you would like to use develop a flutter module in tandem with
+      #  its client project you can use the `path` option.
+      #
+      #     pub 'flutter_module', :path => '../'
+      #
+      #  Using this option Embed Flutter will assume the given folder
+      #  to be the root of the flutter module or the root of flutter module `pubspec` file
+      #  or points to the `pubspec` file itself and will link the files directly from there
+      #  in the Pods project. This means that your edits will persist to
+      #  CocoaPods installations.
+      #
+      #  The referenced folder can be a checkout of your your favourite SCM or
+      #  even a git submodule of the current repository.
+      #
+      #  Note that either the flutter module or the `pubspec` of the flutter module
+      #  can be in the folder. Optionally you can provide the `pubspec` file directly.
+      #
+      #
+      # ### From a flutter module in the root of a library repository.
+      #
+      # Sometimes you may want to use the bleeding edge version of a module. Or a
+      # specific revision. If this is the case, you can specify that with your
+      # pub declaration.
+      #
+      # To use the `master` or `main` branch of the repository:
+      #
+      #     pub 'flutter_module', :git => 'https://github.com/octokit/flutter_module.git'
+      #
+      #
+      # To use a different branch of the repository:
+      #
+      #     pub 'flutter_module', :git => 'https://github.com/octokit/flutter_module.git', :branch => 'dev'
+      #
+      #
+      # To use a tag of the repository:
+      #
+      #     pub 'flutter_module', :git => 'https://github.com/octokit/flutter_module.git', :tag => '0.7.0'
+      #
+      #
+      # Or specify a commit:
+      #
+      #     pub 'flutter_module', :git => 'https://github.com/octokit/flutter_module.git', :commit => '082f8319af'
+      #
+      # The flutter module or its `pubspec` file is expected to be in the
+      # root of the repository.
+      #
+      #
+      # @note       This method allow a nil name and the raises to be more
+      #             informative.
+      #
+      # @return     [void]
+      #
       def pub(name = nil, *requirements)
         pubspec = Flutter::Pub::ExternalSources.fetchWithNameAndOptions(name, requirements)
         pubspec.setup