Get completely rid of :head version support

lib/cocoapods/command/outdated.rb

@@ -8,7 +8,7 @@ module Pod
 
       self.description = <<-DESC
         Shows the outdated pods in the current Podfile.lock, but only those from
-        spec repos, not those from local/external sources or `:head` versions.
+        spec repos, not those from local/external sources.
       DESC
 
       # Run the command

lib/cocoapods/downloader.rb

@@ -67,7 +67,7 @@ module Pod
     #
     def self.download_request(request, target)
       result = Response.new
-      result.checkout_options = download_source(request.name, target, request.params, request.head?)
+      result.checkout_options = download_source(target, request.params)
       result.location = target
 
       if request.released_pod?
@@ -88,35 +88,22 @@ module Pod
 
     private
 
-    # Downloads a pod with the given `name` and `params` to `target`.
-    #
-    # @param  [String] name
+    # Downloads a pod with the given `params` to `target`.
     #
     # @param  [Pathname] target
     #
     # @param  [Hash<Symbol,String>] params
     #
-    # @param  [Boolean] head
-    #
     # @return [Hash] The checkout options required to re-download this exact
     #         same source.
     #
-    def self.download_source(name, target, params, head)
+    def self.download_source(target, params)
       FileUtils.rm_rf(target)
       downloader = Downloader.for_target(target, params)
-      if head
-        unless downloader.head_supported?
-          raise Informative, "The pod '#{name}' does not " \
-            "support the :head option, as it uses a #{downloader.name} " \
-            'source. Remove that option to use this pod.'
-        end
-        downloader.download_head
-      else
-        downloader.download
-      end
+      downloader.download
       target.mkpath
 
-      if downloader.options_specific? && !head
+      if downloader.options_specific?
         params
       else
         downloader.checkout_options

lib/cocoapods/downloader/request.rb

@@ -23,11 +23,6 @@ module Pod
       #
       attr_reader :params
 
-      # @return [Boolean] Whether the download request is for a head download.
-      #
-      attr_reader :head
-      alias_method :head?, :head
-
       # Initialize a new instance
       #
       # @param  [Specification,Nil] spec
@@ -42,15 +37,11 @@ module Pod
       # @param  [Hash<Symbol,String>,Nil] params
       #         see {#params}
       #
-      # @param  [Boolean] head
-      #         see {#head}
-      #
-      def initialize(spec: nil, released: false, name: nil, params: false, head: false)
+      def initialize(spec: nil, released: false, name: nil, params: false)
         @released_pod = released
         @spec = spec
         @params = spec ? (spec.source && spec.source.dup) : params
         @name = spec ? spec.name : name
-        @head = head
 
         validate!
       end

spec/unit/downloader/cache_spec.rb

@@ -11,7 +11,7 @@ module Pod
 
       @stub_download = lambda do |&blk|
         original_download_source = Downloader.method(:download_source)
-        Downloader.define_singleton_method(:download_source) do |_name, target, _params, _head|
+        Downloader.define_singleton_method(:download_source) do |target, _params|
           FileUtils.mkdir_p target
           Dir.chdir(target) do
             result = blk.call