brew log command

Shows the git-log for that formula.

Library/Homebrew/ARGV+yeast.rb

@@ -89,14 +89,18 @@ Commands:
   install formula ... [--debug|-d] [--interactive|-i] [--ignore-dependencies]
   remove formula ...
   search [regex]
-  list [formula] ...
+  list [-v] [formula] ...
   link formula ...
+  unlink formula ...
   home formula ...
   info [formula] [--github]
-  create URL
   prune
   update
 
+Commands useful when contributing:
+  log formula
+  create URL
+
 To visit the Homebrew homepage type:
   brew home
   EOS

bin/brew

@@ -203,8 +203,12 @@ begin
         ARGV.named.each {|name| info name}
       end
 
-    else
-      puts ARGV.usage
+  when 'log'
+    Dir.chdir HOMEBREW_PREFIX
+    exec "git", "log", ARGV.formulae.first.path, *ARGV.options
+
+  else
+    puts ARGV.usage
   end
 
 rescue UsageError