From 8df8523a8fa43d3c720095588905b313d2b42f52 Mon Sep 17 00:00:00 2001
From: Alexander <alexander.tarasyuk@outlook.com>
Date: Mon, 16 Dec 2019 22:42:18 +0200
Subject: [PATCH] show an error if --showConfig is enabled and tsconfig.json
 does not exist

---
 src/compiler/diagnosticMessages.json         |  4 ++++
 src/executeCommandLine/executeCommandLine.ts | 12 +++++++++---
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 890e88f05eb08..d3b4a1dd2b8a5 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3325,6 +3325,10 @@
         "category": "Error",
         "code": 5080
     },
+    "Cannot find a tsconfig.json file at the current directory: {0}.": {
+        "category": "Error",
+        "code": 5081
+    },
 
     "Generates a sourcemap for each corresponding '.d.ts' file.": {
         "category": "Message",
diff --git a/src/executeCommandLine/executeCommandLine.ts b/src/executeCommandLine/executeCommandLine.ts
index 94d7a19f30e25..5c2bb814e45ef 100644
--- a/src/executeCommandLine/executeCommandLine.ts
+++ b/src/executeCommandLine/executeCommandLine.ts
@@ -240,9 +240,15 @@ namespace ts {
         }
 
         if (commandLine.fileNames.length === 0 && !configFileName) {
-            printVersion(sys);
-            printHelp(sys, getOptionsForHelp(commandLine));
-            return sys.exit(ExitStatus.Success);
+            if (commandLine.options.showConfig) {
+                reportDiagnostic(createCompilerDiagnostic(Diagnostics.Cannot_find_a_tsconfig_json_file_at_the_current_directory_Colon_0, normalizePath(sys.getCurrentDirectory())));
+                return sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);
+            }
+            else {
+                printVersion(sys);
+                printHelp(sys, getOptionsForHelp(commandLine));
+                return sys.exit(ExitStatus.Success);
+            }
         }
 
         const currentDirectory = sys.getCurrentDirectory();