GET /api/reload.json to reload metadata

lib/diver_down/web.rb

@@ -78,6 +78,8 @@ def call(env)
       in ['GET', %r{\A/api/sources/(?<source>[^/]+)\.json\z}]
         source = Regexp.last_match[:source]
         @action.source(source)
+      in ['GET', %r{\A/api/reload\.json\z}]
+        @action.reload_cache
       in ['POST', %r{\A/api/sources/(?<source>[^/]+)/module.json\z}]
         source = Regexp.last_match[:source]
         modulee = request.params['module'] || ''

lib/diver_down/web/action.rb

@@ -356,6 +356,13 @@ def set_memo(source_name, memo)
         end
       end
 
+      # @return [Array[Integer, Hash, Array]]
+      def reload_cache
+        @metadata.reload
+        reload
+        json({})
+      end
+
       # @return [Array[Integer, Hash, Array]]
       def not_found
         [404, { 'content-type' => 'text/plain' }, ['not found']]

lib/diver_down/web/metadata.rb

@@ -6,7 +6,7 @@ class Metadata
       require 'diver_down/web/metadata/source_metadata'
       require 'diver_down/web/metadata/source_alias'
 
-      attr_reader :source_alias
+      attr_reader :path, :source_alias
 
       # @param path [String]
       def initialize(path)
@@ -47,7 +47,7 @@ def reload
         @source_map = Hash.new { |h, source_name| h[source_name] = DiverDown::Web::Metadata::SourceMetadata.new }
         @source_alias = DiverDown::Web::Metadata::SourceAlias.new
 
-        loaded = YAML.load_file(@path)
+        loaded = YAML.load_file(@path) if File.exist?(@path)
 
         return if loaded.nil?
 

spec/diver_down/web_spec.rb

@@ -790,4 +790,20 @@ def assert_definition_group(definition_group, expected_ids)
       expect(metadata.source_alias.to_h).to eq(prev)
     end
   end
+
+  describe 'POST /api/reload.json' do
+    it 'reloads metadata from file' do
+      new_metadata = DiverDown::Web::Metadata.new(metadata.path)
+      new_metadata.source('a.rb').module = 'A'
+      new_metadata.flush
+
+      expect {
+        get '/api/reload.json'
+      }.to change {
+        metadata.source('a.rb').module
+      }.from(nil).to('A')
+
+      expect(last_response.status).to eq(200)
+    end
+  end
 end