Reload completion on file changes

src/scry/completion/dependency_graph.cr

@@ -61,6 +61,10 @@ module Scry::Completion::DependencyGraph
     def each
       @nodes.each
     end
+
+    def delete(value : String)
+      @nodes.delete value
+    end
   end
 
   class Builder
@@ -84,6 +88,11 @@ module Scry::Completion::DependencyGraph
       graph
     end
 
+    def rebuild(graph, filename)
+      process_requires(filename, graph)
+      graph
+    end
+
     def process_requires(file, graph)
       requires = parse_requires(file)
       current_file_path = File.expand_path(file)

src/scry/context.cr

@@ -169,6 +169,7 @@ module Scry
       when FileEventType::Deleted
         PublishDiagnostic.new(@workspace, text_document.uri).clean
       when FileEventType::Changed
+        @workspace.reopen_workspace(text_document)
         analyzer = Analyzer.new(@workspace, text_document)
         response = analyzer.run
         response

src/scry/workspace.cr

@@ -9,16 +9,26 @@ module Scry
     property open_files
     property dependency_graph : Completion::DependencyGraph::Graph
 
+    @lookup_path : Array(String)
+
     def initialize(root_uri, process_id, max_number_of_problems)
       @root_uri = root_uri
       @process_id = process_id
       @max_number_of_problems = max_number_of_problems
       @open_files = {} of String => {TextDocument, Completion::MethodDB}
       @dependency_graph = Completion::DependencyGraph::Graph.new
+      @lookup_path = ENV["CRYSTAL_PATH"].split(":") + [@root_uri]
     end
 
     def open_workspace
-      @dependency_graph = Completion::DependencyGraph::Builder.new(ENV["CRYSTAL_PATH"].split(":") + [@root_uri]).build
+      @dependency_graph = Completion::DependencyGraph::Builder.new(@lookup_path).build
+    end
+
+    def reopen_workspace(file)
+      @dependency_graph = Completion::DependencyGraph::Builder.new(@lookup_path).rebuild(@dependency_graph, file.filename)
+      file_dependencies = @dependency_graph[file.filename].descendants.map &.value
+      method_db = Completion::MethodDB.generate(file_dependencies)
+      @open_files[file.filename] = {file, method_db}
     end
 
     def put_file(params : DidOpenTextDocumentParams)
@@ -42,6 +52,7 @@ module Scry
     def drop_file(params : TextDocumentParams)
       filename = TextDocument.uri_to_filename(params.text_document.uri)
       @open_files.delete(filename)
+      @dependency_graph.delete(filename)
     end
 
     def get_file(text_document : TextDocumentIdentifier)