Some initial work for the Dart Kythe indexer support in the analysis server

pkg/analysis_server/lib/src/services/kythe/schema.dart

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// This file gathers constant strings from the Kythe Schema:
+/// kythe.io/docs/schema/
+
+/// Dart specific facts, labels, and kinds
+const DART_LANG = 'dart';
+const DYNAMIC_KIND = 'dynamic#builtin';
+const FN_BUILTIN = 'fn#builtin';
+const VOID_BUILTIN = 'void#builtin';
+
+/// Kythe node fact labels
+const NODE_KIND_FACT = '/kythe/node/kind';
+const SUBKIND_FACT = '/kythe/subkind';
+
+const ANCHOR_START_FACT = '/kythe/loc/start';
+const ANCHOR_END_FACT = '/kythe/loc/end';
+
+const SNIPPET_START_FACT = '/kythe/snippet/start';
+const SNIPPET_END_FACT = '/kythe/snippet/end';
+
+const TEXT_FACT = '/kythe/text';
+const TEXT_ENCODING_FACT = '/kythe/text/encoding';
+
+const COMPLETE_FACT = '/kythe/complete';
+
+const TEXT_FORMAT = '/kythe/format';
+
+/// DEFAULT_TEXT_ENCODING is the assumed value of the TEXT_ENCODING_FACT if it
+/// is empty or missing from a node with a TEXT_FACT.
+const DEFAULT_TEXT_ENCODING = 'UTF-8';
+
+/// Kythe node kinds
+const ANCHOR_KIND = 'anchor';
+const FILE_KIND = 'file';
+
+const CONSTANT_KIND = 'constant';
+const DOC_KIND = 'doc';
+const ENUM_KIND = 'enum';
+const FUNCTION_KIND = 'function';
+const PACKAGE_KIND = 'package';
+const RECORD_KIND = 'record';
+const TAPP_KIND = 'tapp';
+const VARIABLE_KIND = 'variable';
+
+/// Kythe node subkinds
+const CLASS_SUBKIND = 'class';
+const CONSTRUCTOR_SUBKIND = 'constructor';
+const ENUM_CLASS_SUBKIND = 'enumClass';
+const IMPLICIT_SUBKIND = 'implicit';
+const FIELD_SUBKIND = 'field';
+const LOCAL_SUBKIND = 'local';
+const LOCAL_PARAMETER_SUBKIND = 'local/parameter';
+
+/// Kythe complete states
+const INCOMPLETE = 'incomplete';
+const DEFINITION = 'definition';
+
+/// Kythe ordinal
+const ORDINAL = '/kythe/ordinal';
+
+/// EdgePrefix is the standard Kythe prefix for all edge kinds.
+const EDGE_PREFIX = '/kythe/edge/';
+
+/// Kythe edge kinds
+const ANNOTATED_BY_EDGE = EDGE_PREFIX + "annotatedby";
+const CHILD_OF_EDGE = EDGE_PREFIX + "childof";
+const EXTENDS_EDGE = EDGE_PREFIX + "extends";
+const INSTANTIATES_EDGE = EDGE_PREFIX + "instantiates";
+const OVERRIDES_EDGE = EDGE_PREFIX + "overrides";
+const PARAM_EDGE = EDGE_PREFIX + "param";
+const TYPED_EDGE = EDGE_PREFIX + "typed";
+
+/// Kythe edge kinds associated with anchors
+const DEFINES_EDGE = EDGE_PREFIX + "defines";
+const DEFINES_BINDING_EDGE = EDGE_PREFIX + "defines/binding";
+const DOCUMENTS_EDGE = EDGE_PREFIX + "documents";
+const REF_EDGE = EDGE_PREFIX + "ref";
+const REF_CALL_EDGE = EDGE_PREFIX + "ref/call";
+const REF_IMPORTS_EDGE = EDGE_PREFIX + "ref/imports";