pgtap 0.94.0.

Closes Homebrew/homebrew#25903.

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

Formula/pgtap.rb

@@ -1,16 +1,48 @@
 require 'formula'
 
 class Pgtap < Formula
-  homepage 'http://pgtap.org'
-  url 'http://api.pgxn.org/dist/pgtap/0.91.0/pgtap-0.91.0.zip'
-  sha1 '1f10b78eb42361659603228c754a55755fcff4fa'
+  homepage 'http://pgtap.org/'
+  url 'http://api.pgxn.org/dist/pgtap/0.94.0/pgtap-0.94.0.zip'
+  sha1 '58c04a57d79345c18525ed4aee9db058964408a1'
+  head 'https://github.com/theory/pgtap.git'
 
-  depends_on :postgresql
+  # Not :postgresql, because we need to install into its share directory.
+  depends_on 'postgresql'
 
   skip_clean 'share'
 
+  resource 'Test::Harness' do
+    url 'http://cpan.metacpan.org/authors/id/L/LE/LEONT/Test-Harness-3.30.tar.gz'
+    sha1 '5f7cc2392accaf47100cf2a57c5513c3fa29b1dc'
+  end
+
+  resource 'TAP::Parser::SourceHandler::pgTAP' do
+    url 'http://cpan.metacpan.org/authors/id/D/DW/DWHEELER/TAP-Parser-SourceHandler-pgTAP-3.29.tar.gz'
+    sha1 '8cf6dc2ec833b896a0638390a33e2c477a58e020'
+  end
+
   def install
-    ENV.prepend_path 'PATH', Formula.factory('postgresql').bin
-    system "make install"
+    # Make sure modules can find just-installed dependencies.
+    arch  = %x(perl -MConfig -E 'print $Config{archname}')
+    plib  = "#{lib}/perl5"
+    ENV['PERL5LIB'] = "#{plib}:#{plib}/#{arch}:#{lib}:#{lib}/#{arch}"
+
+    resource('Test::Harness').stage do
+      system 'perl', 'Makefile.PL', "INSTALL_BASE=#{prefix}",
+             "INSTALLSITEMAN1DIR=#{man1}", "INSTALLSITEMAN3DIR=#{man3}"
+      system 'make'
+      system 'make', 'install'
+    end
+
+    resource('TAP::Parser::SourceHandler::pgTAP').stage do
+      system 'perl', 'Build.PL', "--install_base", prefix, '--install_path',
+             "bindoc=#{man1}", '--install_path', "libdoc=#{man3}"
+      system './Build'
+      system './Build', 'install'
+    end
+
+    pg_config = Formula.factory('postgresql').opt_prefix/'bin/pg_config'
+    system 'make', "PG_CONFIG=#{pg_config}"
+    system 'make', "PG_CONFIG=#{pg_config}", 'install'
   end
 end