Add patch to rake-compiler-1.1.1 for make install

With this patch rake-compiler executes not just "make" but also "make install" the same way as "gem install" does.
That way postgresql_lib_path.rb is copied into the lib folder as expected.

Gemfile

@@ -8,7 +8,7 @@ source "https://rubygems.org/"
 gem "hoe-mercurial", "~>1.4", :group => [:development, :test]
 gem "hoe-deveiate", "~>0.9", :group => [:development, :test]
 gem "hoe-highline", "~>0.2", :group => [:development, :test]
-gem "rake-compiler", "~>1.0", :group => [:development, :test]
+gem "rake-compiler", "1.1.1", :group => [:development, :test]
 gem "rake-compiler-dock", "~>1.0", :group => [:development, :test]
 gem "hoe-bundler", "~>1.0", :group => [:development, :test]
 gem "rspec", "~>3.5", :group => [:development, :test]

Rakefile

@@ -6,6 +6,7 @@ require 'tmpdir'
 
 begin
 	require 'rake/extensiontask'
+	require_relative 'misc/rake-compiler-make-install-patch'
 rescue LoadError
 	abort "This Rakefile requires rake-compiler (gem install rake-compiler)"
 end
@@ -63,7 +64,7 @@ $hoespec = Hoe.spec 'pg' do
 	self.developer 'Michael Granger', 'ged@FaerieMUD.org'
 	self.developer 'Lars Kanis', 'lars@greiz-reinsdorf.de'
 
-	self.dependency 'rake-compiler', '~> 1.0', :developer
+	self.dependency 'rake-compiler', '1.1.1', :developer
 	self.dependency 'rake-compiler-dock', ['~> 1.0'], :developer
 	self.dependency 'hoe-deveiate', '~> 0.9', :developer
 	self.dependency 'hoe-bundler', '~> 1.0', :developer

misc/rake-compiler-make-install-patch.rb

@@ -0,0 +1,153 @@
+require 'rake/baseextensiontask'
+
+module Rake
+  class ExtensionTask < BaseExtensionTask
+
+    # Replace method
+    undef define_compile_tasks
+
+    def define_compile_tasks(for_platform = nil, ruby_ver = RUBY_VERSION)
+      # platform usage
+      platf = for_platform || platform
+
+      binary_path = binary(platf)
+
+      # lib_path
+      lib_path = lib_dir
+
+      lib_binary_path = "#{lib_path}/#{binary_path}"
+      lib_binary_dir_path = File.dirname(lib_binary_path)
+
+      # tmp_path
+      tmp_path = "#{@tmp_dir}/#{platf}/#{@name}/#{ruby_ver}"
+      stage_path = "#{@tmp_dir}/#{platf}/stage"
+
+      siteconf_path = "#{tmp_path}/.rake-compiler-siteconf.rb"
+      tmp_binary_path = "#{tmp_path}/#{binary_path}"
+      tmp_binary_dir_path = File.dirname(tmp_binary_path)
+      stage_binary_path = "#{stage_path}/#{lib_path}/#{binary_path}"
+      stage_binary_dir_path = File.dirname(stage_binary_path)
+
+      # cleanup and clobbering
+      CLEAN.include(tmp_path)
+      CLEAN.include(stage_path)
+      CLOBBER.include("#{lib_path}/#{binary(platf)}")
+      CLOBBER.include("#{@tmp_dir}")
+
+      # directories we need
+      directory tmp_path
+      directory tmp_binary_dir_path
+      directory lib_binary_dir_path
+      directory stage_binary_dir_path
+
+      directory File.dirname(siteconf_path)
+      # Set paths for "make install" destinations
+      file siteconf_path => File.dirname(siteconf_path) do
+        File.open(siteconf_path, "w") do |siteconf|
+          siteconf.puts "require 'rbconfig'"
+          siteconf.puts "require 'mkmf'"
+          siteconf.puts "dest_path = mkintpath(#{File.expand_path(lib_path).dump})"
+          %w[sitearchdir sitelibdir].each do |dir|
+            siteconf.puts "RbConfig::MAKEFILE_CONFIG['#{dir}'] = dest_path"
+            siteconf.puts "RbConfig::CONFIG['#{dir}'] = dest_path"
+          end
+        end
+      end
+
+      # copy binary from temporary location to final lib
+      # tmp/extension_name/extension_name.{so,bundle} => lib/
+      task "copy:#{@name}:#{platf}:#{ruby_ver}" => [lib_binary_dir_path, tmp_binary_path, "#{tmp_path}/Makefile"] do
+        # install in lib for native platform only
+        unless for_platform
+          sh "#{make} install", chdir: tmp_path
+        end
+      end
+      # copy binary from temporary location to staging directory
+      task "copy:#{@name}:#{platf}:#{ruby_ver}" => [stage_binary_dir_path, tmp_binary_path] do
+        cp tmp_binary_path, stage_binary_path
+      end
+
+      # copy other gem files to staging directory
+      define_staging_file_tasks(@gem_spec.files, lib_path, stage_path, platf, ruby_ver) if @gem_spec
+
+      # binary in temporary folder depends on makefile and source files
+      # tmp/extension_name/extension_name.{so,bundle}
+      file tmp_binary_path => [tmp_binary_dir_path, "#{tmp_path}/Makefile"] + source_files do
+        jruby_compile_msg = <<-EOF
+Compiling a native C extension on JRuby. This is discouraged and a
+Java extension should be preferred.
+        EOF
+        warn_once(jruby_compile_msg) if defined?(JRUBY_VERSION)
+
+        chdir tmp_path do
+          sh make
+          if binary_path != File.basename(binary_path)
+            cp File.basename(binary_path), binary_path
+          end
+        end
+      end
+
+      # makefile depends of tmp_dir and config_script
+      # tmp/extension_name/Makefile
+      file "#{tmp_path}/Makefile" => [tmp_path, extconf, siteconf_path] do |t|
+        options = @config_options.dup
+
+        # include current directory
+        include_dirs = ['.'].concat(@config_includes).uniq.join(File::PATH_SEPARATOR)
+        cmd = [Gem.ruby, "-I#{include_dirs}", "-r#{File.basename(siteconf_path)}"]
+
+        # build a relative path to extconf script
+        abs_tmp_path = (Pathname.new(Dir.pwd) + tmp_path).realpath
+        abs_extconf = (Pathname.new(Dir.pwd) + extconf).realpath
+
+        # now add the extconf script
+        cmd << abs_extconf.relative_path_from(abs_tmp_path)
+
+        # fake.rb will be present if we are cross compiling
+        if t.prerequisites.include?("#{tmp_path}/fake.rb") then
+          options.push(*cross_config_options(platf))
+        end
+
+        # add options to command
+        cmd.push(*options)
+
+        # add any extra command line options
+        unless extra_options.empty?
+          cmd.push(*extra_options)
+        end
+
+        chdir tmp_path do
+          # FIXME: Rake is broken for multiple arguments system() calls.
+          # Add current directory to the search path of Ruby
+          sh cmd.join(' ')
+        end
+      end
+
+      # compile tasks
+      unless Rake::Task.task_defined?('compile') then
+        desc "Compile all the extensions"
+        task "compile"
+      end
+
+      # compile:name
+      unless Rake::Task.task_defined?("compile:#{@name}") then
+        desc "Compile #{@name}"
+        task "compile:#{@name}"
+      end
+
+      # Allow segmented compilation by platform (open door for 'cross compile')
+      task "compile:#{@name}:#{platf}" => ["copy:#{@name}:#{platf}:#{ruby_ver}"]
+      task "compile:#{platf}" => ["compile:#{@name}:#{platf}"]
+
+      # Only add this extension to the compile chain if current
+      # platform matches the indicated one.
+      if platf == RUBY_PLATFORM then
+        # ensure file is always copied
+        file "#{lib_path}/#{binary_path}" => ["copy:#{name}:#{platf}:#{ruby_ver}"]
+
+        task "compile:#{@name}" => ["compile:#{@name}:#{platf}"]
+        task "compile" => ["compile:#{platf}"]
+      end
+    end
+  end
+end