From e088c6824209d98eccb0f1e6c7e21f26b4a1178d Mon Sep 17 00:00:00 2001
From: Eric Hodel <drbrain@segment7.net>
Date: Mon, 6 Jan 2014 14:20:18 -0800
Subject: [PATCH] Add BasicSpecification#source_paths

This allows documentation and analysis tools to retrieve paths of source
files in gems.  This is needed as the introduction of shared gem
directories means the extension source directory is no longer included
in require_paths (which was meant for $LOAD_PATH, not source code).
---
 lib/rubygems/basic_specification.rb     | 18 ++++++++++++++++++
 test/rubygems/test_gem_specification.rb | 16 ++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/lib/rubygems/basic_specification.rb b/lib/rubygems/basic_specification.rb
index a52377f..470a6eb 100644
--- a/lib/rubygems/basic_specification.rb
+++ b/lib/rubygems/basic_specification.rb
@@ -207,6 +207,24 @@ def require_paths
   end
 
   ##
+  # Returns the paths to the source files for use with analysis and
+  # documentation tools.  These paths are relative to full_gem_path.
+
+  def source_paths
+    paths = raw_require_paths.dup
+
+    if @extensions then
+      ext_dirs = @extensions.map do |extension|
+        extension.split(File::SEPARATOR, 2).first
+      end.uniq
+
+      paths.concat ext_dirs
+    end
+
+    paths.uniq
+  end
+
+  ##
   # Return a Gem::Specification from this gem
 
   def to_spec
diff --git a/test/rubygems/test_gem_specification.rb b/test/rubygems/test_gem_specification.rb
index 46db0c4..b72a5d1 100644
--- a/test/rubygems/test_gem_specification.rb
+++ b/test/rubygems/test_gem_specification.rb
@@ -1809,6 +1809,22 @@ def test_source
     assert_kind_of Gem::Source::Installed, @a1.source
   end
 
+  def test_source_paths
+    ext_spec
+
+    @ext.require_paths = %w[lib ext foo]
+    @ext.extensions << 'bar/baz'
+
+    expected = %w[
+      lib
+      ext
+      foo
+      bar
+    ]
+
+    assert_equal expected, @ext.source_paths
+  end
+
   def test_full_require_paths
     ext_spec
 
-- 
1.8.5.1