Error with a suggestion of '.' for empty project reference paths

internal/diagnostics/extraDiagnosticMessages.json

@@ -43,6 +43,10 @@
         "category": "Error",
         "code": 5090
     },
+    "A project reference path cannot be an empty string. Did you mean '.'?": {
+        "category": "Error",
+        "code": 18052
+    },
     "A JSDoc '@type' tag on a function must have a signature with the correct number of arguments.": {
         "category": "Error",
         "code": 8030

internal/tsoptions/tsconfigparsing.go

@@ -1358,7 +1358,7 @@ func parseJsonConfigFileContentWorker(
 					continue
 				}
 				if ref.reference.Path == "" {
-					errors = append(errors, createDiagnosticAtProjectReferenceProperty(sourceFile, index, "path", diagnostics.Compiler_option_0_cannot_be_given_an_empty_string, "reference.path"))
+					errors = append(errors, createDiagnosticAtProjectReferenceProperty(sourceFile, index, "path", diagnostics.A_project_reference_path_cannot_be_an_empty_string_Did_you_mean))
 					continue
 				}
 				if ref.hasCircular && !ref.circularValid {

internal/tsoptions/tsconfigparsing_test.go

@@ -302,6 +302,19 @@ var parseJsonConfigFileTests = []parseJsonConfigTestCase{
 			allFileList:    map[string]string{"/apath/a.ts": ""},
 		}},
 	},
+	{
+		title:               "generates errors for empty reference path",
+		noSubmoduleBaseline: true,
+		input: []testConfig{{
+			jsonText: `{
+                "references": [{ "path": "" }],
+                "files": ["a.ts"]
+            }`,
+			configFileName: "/apath/tsconfig.json",
+			basePath:       "/apath",
+			allFileList:    map[string]string{"/apath/a.ts": ""},
+		}},
+	},
 	{
 		title: "exclude outDir unless overridden",
 		input: []testConfig{{

testdata/baselines/reference/config/tsconfigParsing/generates errors for empty reference path with json api.js

@@ -0,0 +1,24 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "references": [{ "path": "" }],
+                "files": ["a.ts"]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+CompilerOptions::
+{
+  "configFilePath": "/apath/tsconfig.json"
+}
+
+TypeAcquisition::
+{}
+
+FileNames::
+/apath/a.ts
+Errors::
+error TS18052: A project reference path cannot be an empty string. Did you mean '.'?

testdata/baselines/reference/config/tsconfigParsing/generates errors for empty reference path with jsonSourceFile api.js

@@ -0,0 +1,28 @@
+Fs::
+//// [/apath/a.ts]
+
+
+//// [/apath/tsconfig.json]
+{
+                "references": [{ "path": "" }],
+                "files": ["a.ts"]
+            }
+
+
+configFileName:: /apath/tsconfig.json
+CompilerOptions::
+{
+  "configFilePath": "/apath/tsconfig.json"
+}
+
+TypeAcquisition::
+{}
+
+FileNames::
+/apath/a.ts
+Errors::
+tsconfig.json:2:42 - error TS18052: A project reference path cannot be an empty string. Did you mean '.'?
+
+2                 "references": [{ "path": "" }],
+                                           ~~
+

testdata/baselines/reference/tsbuild/configFileErrors/reports-invalid-project-reference-fields.js

@@ -60,7 +60,7 @@ Output::
 9         { "path": "./utils", "circular": "yes" },
                                            ~~~~~
 
-tsconfig.json:10:19 - error TS18051: Compiler option 'reference.path' cannot be given an empty string.
+tsconfig.json:10:19 - error TS18052: A project reference path cannot be an empty string. Did you mean '.'?
 
 10         { "path": "" },
                      ~~