Updated formula: factor

I made this formula working again with latest HEAD, and added the
wrapper in bin.

Signed-off-by: Mike McQuaid <[email protected]>

Library/Formula/factor.rb

@@ -1,23 +1,26 @@
 require 'formula'
 
-# This formula installs Factor TRUNK, as there is no
-# good stable release. It also takes up to and including
-# "a very long time" to bootstrap the image.
+# This formula installs Factor TRUNK.
+# One can install the latest stable release using the official DMG.
 
 class Factor <Formula
  head 'git:https://github.com/slavapestov/factor.git'
  homepage 'http:https://factorcode.org/'
 
  def install
- system "make"
- curl "http:https://factorcode.org/images/latest/boot.unix-x86.64.image", "-O"
- system "./factor -i=boot.unix-x86.64.image"
- libexec.install "Factor.app"
- libexec.install "factor.image"
+ # The build script assume it's in a Git repository.
+ ENV['GIT_DIR']="#{@downloader.cached_location}/.git"
+ system "./build-support/factor.sh update"
+
+ libexec.install ["Factor.app", "factor.image", "factor"]
+ (bin/'factor').write <<-EOS.undent
+ #!/bin/sh
+ exec #{libexec}/factor $@
+ EOS
  end
 
  def caveats
- "Cocoa app installed to #{libexec}.\n\n"\
+ "Cocoa app installed to #{libexec}/Factor.app.\n\n"\
  "Makes use of 'factor.image' in the same folder."
  end
 end