add two options to cmd/home

Library/Homebrew/cmd/home.rb

@@ -18,6 +18,11 @@ module Homebrew
         Open a <formula> or <cask>'s homepage in a browser, or open
         Homebrew's own homepage if no argument is provided.
       EOS
+      switch "--formula", "--formulae",
+             description: "Treat all named arguments as formulae."
+      switch "--cask", "--casks",
+             description: "Treat all named arguments as casks."
+      conflicts "--formula", "--cask"
     end
   end
 
@@ -30,7 +35,9 @@ module Homebrew
       return
     end
 
-    homepages = args.named.to_formulae_and_casks.map do |formula_or_cask|
+    only = :formula if args.formula? && !args.cask?
+    only = :cask if args.cask? && !args.formula?
+    homepages = args.named.to_formulae_and_casks(only: only).map do |formula_or_cask|
       puts "Opening homepage for #{name_of(formula_or_cask)}"
       formula_or_cask.homepage
     end

docs/Manpage.md

@@ -211,6 +211,11 @@ error message if no logs are found.
 Open a *`formula`* or *`cask`*'s homepage in a browser, or open
 Homebrew's own homepage if no argument is provided.
 
+* `--formula`:
+  Treat all named arguments as formulae.
+* `--cask`:
+  Treat all named arguments as casks.
+
 ### `info` [*`options`*] [*`formula`*|*`cask`*]
 
 Display brief statistics for your Homebrew installation.

manpages/brew.1

@@ -258,6 +258,14 @@ The Gist will be marked private and will not appear in listings but will be acce
 .SS "\fBhome\fR [\fIformula\fR|\fIcask\fR]"
 Open a \fIformula\fR or \fIcask\fR\'s homepage in a browser, or open Homebrew\'s own homepage if no argument is provided\.
 .
+.TP
+\fB\-\-formula\fR
+Treat all named arguments as formulae\.
+.
+.TP
+\fB\-\-cask\fR
+Treat all named arguments as casks\.
+.
 .SS "\fBinfo\fR [\fIoptions\fR] [\fIformula\fR|\fIcask\fR]"
 Display brief statistics for your Homebrew installation\.
 .