ImageMagick - use svn repo instead of tarballs

The ImageMagick mirrors like to drop old tarballs, which means that our
formula breaks whenever the version we're using disappears.

So I've switched to using their SVN repo (and added a --HEAD build.)

Caveat: Their SVN repo is only served over https, with a bad cert,
so this brew know has a custom SVN download strategy that auto-accepts
that cert.

If this bothers you, get ImageMagick to fix their cert upstream (or
let us know where a stable tarball mirror lives.)

1 files changed, 33 insertions, 7 deletions

diff --git a/Library/Formula/imagemagick.rb b/Library/Formula/imagemagick.rb
index 8c11d6895..eb22e0274 100644
--- a/Library/Formula/imagemagick.rb
+++ b/Library/Formula/imagemagick.rb
@@ -1,6 +1,12 @@
 # some credit to http://github.com/maddox/magick-installer
 require 'formula'
 
+class UnsafeSvn <SubversionDownloadStrategy
+  def _fetch_command svncommand, url, target
+    [svn, '--non-interactive', '--trust-server-cert', svncommand, '--force', url, target]
+  end
+end
+
 def ghostscript_srsly?
   ARGV.include? '--with-ghostscript'
 end
@@ -24,10 +30,14 @@ def x11?
 end
 
 class Imagemagick <Formula
-  url 'ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick-6.6.4-2.tar.bz2'
-  md5 'a7e9bbbc84fee362e04bb7c32ea46689'
+  url 'https://www.imagemagick.org/subversion/ImageMagick/trunk',
+        :using => UnsafeSvn, :revision => '2715'
+  version '6.6.4-5'
   homepage 'http://www.imagemagick.org'
 
+  head 'https://www.imagemagick.org/subversion/ImageMagick/trunk',
+        :using => UnsafeSvn
+
   depends_on 'jpeg'
   depends_on 'libpng' unless x11?
 
@@ -80,11 +90,27 @@ class Imagemagick <Formula
   end
 
   def caveats
-    s = ""
-    s += "You don't have X11 from the Xcode DMG installed. Consequently Imagemagick is less fully featured.\n" unless x11?
-    s += "Some tools will complain if the ghostscript fonts are not installed in:\n\t#{HOMEBREW_PREFIX}/share/ghostscript/fonts\n" \
-            unless ghostscript_fonts? or ghostscript_srsly?
-    return nil if s.empty?
+    s = <<-EOS.undent
+    Because ImageMagick likes to remove tarballs, we're downloading their
+    stable release from their SVN repo instead. But they only serve the
+    repo over HTTPS, and have an untrusted certificate, so we auto-accept
+    this certificate for you.
+
+    If this bothers you, open a ticket with ImageMagick to fix their cert.
+
+    EOS
+    unless x11?
+      s += <<-EOS.undent
+      You don't have X11 from the Xcode DMG installed. Consequently Imagemagick is less fully featured.
+
+      EOS
+    end
+    unless ghostscript_fonts? or ghostscript_srsly?
+      s += <<-EOS.undent
+      Some tools will complain if the ghostscript fonts are not installed in:
+        #{HOMEBREW_PREFIX}/share/ghostscript/fonts
+      EOS
+    end
     return s
   end