From ff08e1acc36bbe2cd4940dc2df913dcf126130bb Mon Sep 17 00:00:00 2001
From: Iain Beeston <iainbeeston@users.noreply.github.com>
Date: Fri, 3 Mar 2017 10:19:20 +0000
Subject: [PATCH] Added a rake task to automatically download the latest
 metaschemas

The metaschemas change occasionally. Draft6 is changing all the time
as new features are added. So we can keep on top of this, I've added a
new rake task which will download all of the latest metaschemas and
save them over the existing ones (in the resources directory)
---
 Rakefile | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/Rakefile b/Rakefile
index 1d1fc21a..1b016d80 100644
--- a/Rakefile
+++ b/Rakefile
@@ -19,6 +19,43 @@ task :update_common_tests do
   end
 end
 
+desc "Update meta-schemas to the latest version"
+task :update_meta_schemas do
+  puts "Updating meta-schemas..."
+
+  id_mappings = {
+    'http://json-schema.org/draft/schema#' => 'https://raw.githubusercontent.com/json-schema-org/json-schema-spec/master/schema.json'
+  }
+
+  require 'open-uri'
+  require 'thwait'
+
+  download_threads = Dir['resources/*.json'].map do |path|
+    schema_id = File.read(path)[/"\$?id"\s*:\s*"(.*?)"/, 1]
+    schema_uri = id_mappings[schema_id] || schema_id
+
+    Thread.new(schema_uri) do |uri|
+      Thread.current[:uri] = uri
+
+      begin
+        metaschema = URI(uri).read
+
+        File.write(path, metaschema)
+      rescue StandardError
+        false
+      end
+    end
+  end
+
+  ThreadsWait.all_waits(*download_threads) do |t|
+    if t.value
+      puts t[:uri]
+    else
+      STDERR.puts "Failed to update meta-schema #{t[:uri]}"
+    end
+  end
+end
+
 Rake::TestTask.new do |t|
   t.libs << "."
   # disabled warnings because addressable 2.4 has lots of them
@@ -27,4 +64,6 @@ Rake::TestTask.new do |t|
   t.test_files = FileList.new('test/*_test.rb')
 end
 
+task update: [:update_common_tests, :update_meta_schemas]
+
 task :default => :test