Merge pull request #21042 from amcasey/cannotFindModule

Make fixCannotFindModule return an empty array if there is no code action

src/services/codefixes/fixCannotFindModule.ts

@@ -4,9 +4,10 @@ namespace ts.codefix {
     const errorCodes = [Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type.code];
     registerCodeFix({
         errorCodes,
-        getCodeActions: context => [
-            { fixId, ...tryGetCodeActionForInstallPackageTypes(context.host, context.sourceFile.fileName, getModuleName(context.sourceFile, context.span.start)) }
-        ],
+        getCodeActions: context => {
+            const codeAction = tryGetCodeActionForInstallPackageTypes(context.host, context.sourceFile.fileName, getModuleName(context.sourceFile, context.span.start));
+            return codeAction && [{ fixId, ...codeAction }];
+        },
         fixIds: [fixId],
         getAllCodeActions: context => codeFixAll(context, errorCodes, (_, diag, commands) => {
             const pkg = getTypesPackageNameToInstall(context.host, getModuleName(diag.file, diag.start));