gpgme 1.5.1

Big version bump for gpgme, and nudges it over to requiring gpg2 rather
than gpg. The build documentation for gpgme have been strongly
recommending this for quite some time, and MacPorts, Debian and Ubuntu
made this change a while back.

Closes Homebrew/homebrew#34251.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/gpgme.rb

@@ -1,34 +1,42 @@
-require 'formula'
+require "formula"
 
 class Gpgme < Formula
-  homepage 'http://www.gnupg.org/related_software/gpgme/'
-  url 'ftp://ftp.gnupg.org/gcrypt/gpgme/gpgme-1.4.3.tar.bz2'
-  sha1 'ffdb5e4ce85220501515af8ead86fd499525ef9a'
+  homepage "https://www.gnupg.org/related_software/gpgme/"
+  url "ftp://ftp.gnupg.org/gcrypt/gpgme/gpgme-1.5.1.tar.bz2"
+  mirror "https://mirrors.kernel.org/debian/pool/main/g/gpgme1.0/gpgme1.0_1.5.1.orig.tar.bz2"
+  sha1 "a91c258e79acf30ec86a667e07f835e5e79342d8"
 
   bottle do
-    revision 1
     sha1 "60d557c728754011a62f4ede0e04ca786bf5b161" => :yosemite
     sha1 "ae98c80946c947f967d44436717ed492b0f08420" => :mavericks
     sha1 "9e3d8a25586683f0aeb050b341b38da79ba770d5" => :mountain_lion
   end
 
-  depends_on 'gnupg'
-  depends_on 'libgpg-error'
-  depends_on 'libassuan'
-  depends_on 'pth'
+  depends_on "gnupg2"
+  depends_on "libgpg-error"
+  depends_on "libassuan"
+  depends_on "pth"
 
   fails_with :llvm do
     build 2334
   end
 
   def install
+    # Check these inreplaces with each release.
+    # At some point GnuPG will pull the trigger on moving to GPG2 by default.
+    inreplace "tests/gpg/Makefile.in", "GPG = gpg", "GPG = gpg2"
+    inreplace "src/gpgme-config.in", "@GPG@", "#{Formula["gnupg2"].opt_prefix}/bin/gpg2"
+    inreplace "src/gpgme-config.in", "@GPGSM@", "#{Formula["gnupg2"].opt_prefix}/bin/gpgsm"
+
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",
-                          "--enable-static",
-                          "--without-gpgsm",
-                          "--without-gpgconf"
+                          "--enable-static"
     system "make"
-    system "make check"
-    system "make install"
+    system "make", "check"
+    system "make", "install"
+  end
+
+  test do
+    assert_equal "#{Formula["gnupg2"].opt_prefix}/bin/gpg2", shell_output("#{bin}/gpgme-config --get-gpg").strip
   end
 end