From 38022884f422443e232c2455d4b20bbba56c3aeb Mon Sep 17 00:00:00 2001
From: Samuel Giddins <segiddins@segiddins.me>
Date: Mon, 4 Jan 2016 15:30:42 -0600
Subject: [PATCH 1/2] [Dependency] Allow creating from a string that has HEAD
 info

---
 lib/cocoapods-core/dependency.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/cocoapods-core/dependency.rb b/lib/cocoapods-core/dependency.rb
index 589b4b3a2..73b4838c9 100644
--- a/lib/cocoapods-core/dependency.rb
+++ b/lib/cocoapods-core/dependency.rb
@@ -340,6 +340,8 @@ def to_s
     #           part by clients that need to create a dependency equal to the
     #           original one.
     #
+    # @todo     Remove the `HEAD` code once everyone has migrated past 1.0.
+    #
     # @return   [Dependency] the dependency described by the string.
     #
     def self.from_string(string)
@@ -348,6 +350,9 @@ def self.from_string(string)
       version = match_data[2]
       version = version.gsub(/[()]/, '') if version
       case version
+      when ' HEAD'
+        CoreUI.warn "Ignoring obsolete `HEAD` specifier in `#{string}`"
+        Dependency.new(name)
       when nil, /from `(.*)(`|')/
         Dependency.new(name)
       else

From 1e6dc779d9dca58da2ca03a7fb4fbafbb9b4d3d3 Mon Sep 17 00:00:00 2001
From: Samuel Giddins <segiddins@segiddins.me>
Date: Mon, 4 Jan 2016 15:32:05 -0600
Subject: [PATCH 2/2] [CHANGELOG] Add entry for parsing dependency strings with
 HEAD info

---
 CHANGELOG.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f704ec1e8..4e22749f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 ## Master
 
+##### Enhancements
+
+* Dependencies created from a string that use the `HEAD` specifier are properly
+  parsed, ignoring the obsolete specifier.  
+  [Samuel Giddins](https://github.com/segiddins)
+  [CocoaPods#4710](https://github.com/CocoaPods/CocoaPods/issues/4710)
+
 ##### Bug Fixes
 
 * Fix specifying `configuration(s)` for a pod inside a target block.