Task for building SHA512 checksums.

Signed-off-by: Yorick Peterse <yorickpeterse@gmail.com>

Rakefile

@@ -1,4 +1,5 @@
 require 'rubygems/package_task'
+require 'digest/sha2'
 
 GEMSPEC = Gem::Specification.load('ruby-lint.gemspec')
 

task/checksum.rake

@@ -0,0 +1,14 @@
+desc 'Creates SHA512 checksums for all built Gems'
+task :checksum do
+  checksums = File.expand_path('../../checksum', __FILE__)
+  pattern   = File.expand_path('../../pkg/*.gem', __FILE__)
+
+  Dir.glob(pattern).each do |path|
+    name     = File.basename(path) + '.sha512'
+    checksum = Digest::SHA512.new.hexdigest(File.read(path))
+
+    File.open(File.join(checksums, name), 'w') do |handle|
+      handle.write(checksum)
+    end
+  end
+end