From 64e6b7669b1c4ec6d9627e7484a0608bc4f076c8 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 2 Jul 2018 10:15:13 -0700
Subject: [PATCH] .d.ts files don't have outputs

---
 src/compiler/tsbuild.ts                    | 3 ++-
 tests/projects/sample1/core/some_decl.d.ts | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 tests/projects/sample1/core/some_decl.d.ts

diff --git a/src/compiler/tsbuild.ts b/src/compiler/tsbuild.ts
index 498b9eb6432..d8eac339b4b 100644
--- a/src/compiler/tsbuild.ts
+++ b/src/compiler/tsbuild.ts
@@ -295,7 +295,8 @@ namespace ts {
     }
 
     function getOutputFileNames(inputFileName: string, configFile: ParsedCommandLine): ReadonlyArray<string> {
-        if (configFile.options.outFile) {
+        // outFile is handled elsewhere; .d.ts files don't generate outputs
+        if (configFile.options.outFile || fileExtensionIs(inputFileName, Extension.Dts)) {
             return emptyArray;
         }
 
diff --git a/tests/projects/sample1/core/some_decl.d.ts b/tests/projects/sample1/core/some_decl.d.ts
new file mode 100644
index 00000000000..2a9cf55cf28
--- /dev/null
+++ b/tests/projects/sample1/core/some_decl.d.ts
@@ -0,0 +1 @@
+declare const dts: any;