Allow partial installation of resources

3 files changed, 10 insertions, 1 deletions

diff --git a/Library/Formula/erlang.rb b/Library/Formula/erlang.rb
index 1259d3982..9c0ece8b9 100644
--- a/Library/Formula/erlang.rb
+++ b/Library/Formula/erlang.rb
@@ -83,7 +83,7 @@ class Erlang < Formula
     system "make install"
 
     unless build.include? 'no-docs'
-      resource('man').stage { (lib/'erlang').install 'man' }
+      (lib/'erlang').install resource('man').files('man')
       doc.install resource('html')
     end
   end
diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index d39b692ad..8ca86d39a 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -1,5 +1,6 @@
 require 'pathname'
 require 'mach'
+require 'resource'
 
 # we enhance pathname to make our code more readable
 class Pathname
@@ -12,6 +13,8 @@ class Pathname
       case src
       when Resource
         src.stage(self)
+      when Resource::Partial
+        src.resource.stage { install(*src.files) }
       when Array
         if src.empty?
           opoo "tried to install empty array to #{self}"
diff --git a/Library/Homebrew/resource.rb b/Library/Homebrew/resource.rb
index 238d55ddf..5221f2769 100644
--- a/Library/Homebrew/resource.rb
+++ b/Library/Homebrew/resource.rb
@@ -62,6 +62,12 @@ class Resource
     end
   end
 
+  Partial = Struct.new(:resource, :files)
+
+  def files(*files)
+    Partial.new(self, files)
+  end
+
   # For brew-fetch and others.
   def fetch
     # Ensure the cache exists