From 1be120f4c1d7f0be24ead200a6cb0925acc90129 Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Tue, 28 Mar 2017 15:34:34 +0200
Subject: [PATCH] Add `Container::Executable`.

---
 Library/Homebrew/cask/lib/hbc/container.rb     |  2 ++
 .../cask/lib/hbc/container/executable.rb       | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 Library/Homebrew/cask/lib/hbc/container/executable.rb

diff --git a/Library/Homebrew/cask/lib/hbc/container.rb b/Library/Homebrew/cask/lib/hbc/container.rb
index fc7246f3d9..c6b2c3c370 100644
--- a/Library/Homebrew/cask/lib/hbc/container.rb
+++ b/Library/Homebrew/cask/lib/hbc/container.rb
@@ -4,6 +4,7 @@ require "hbc/container/bzip2"
 require "hbc/container/cab"
 require "hbc/container/criteria"
 require "hbc/container/dmg"
+require "hbc/container/executable"
 require "hbc/container/generic_unar"
 require "hbc/container/gzip"
 require "hbc/container/lzma"
@@ -39,6 +40,7 @@ module Hbc
         Gzip,  # pure gzip
         Lzma,  # pure lzma
         Xz,    # pure xz
+        Executable,
       ]
       # for explicit use only (never autodetected):
       # Hbc::Container::Naked
diff --git a/Library/Homebrew/cask/lib/hbc/container/executable.rb b/Library/Homebrew/cask/lib/hbc/container/executable.rb
new file mode 100644
index 0000000000..848f6d4be2
--- /dev/null
+++ b/Library/Homebrew/cask/lib/hbc/container/executable.rb
@@ -0,0 +1,18 @@
+require "hbc/container/naked"
+require "vendor/macho/macho"
+
+module Hbc
+  class Container
+    class Executable < Naked
+      def self.me?(criteria)
+        return true if criteria.magic_number(/^#!\s*\S+/)
+
+        begin
+          MachO.open(criteria.path).header.executable?
+        rescue MachO::MagicError
+          false
+        end
+      end
+    end
+  end
+end