Allow windows to find commands without .exe

pkg/cmd/pulumi/about.go

@@ -604,7 +604,7 @@ func getNodeProgramDependencies(rootDir string, transitive bool) ([]programDepen
 	if _, err = os.Stat(yarnFile); err == nil {
 		ex, err = executable.FindExecutable("yarn")
 		if err != nil {
-			return nil, errors.Wrapf(err, "Found %s but not yarn", yarnFile)
+			return nil, errors.Wrapf(err, "Found %s but not %s", yarnFile, ex)
 		}
 		cmdArgs := []string{"list", "--json"}
 		cmd := exec.Command(ex, cmdArgs...)

sdk/go/common/util/executable/executable.go

@@ -17,9 +17,20 @@ const unableToFindProgramTemplate = "unable to find program: %s"
 // FindExecutable attempts to find the needed executable in various locations on the
 // filesystem, eventually resorting to searching in $PATH.
 func FindExecutable(program string) (string, error) {
+	var err error
+	var ex string
 	if runtime.GOOS == "windows" && !strings.HasSuffix(program, ".exe") {
-		program = fmt.Sprintf("%s.exe", program)
+		exe := fmt.Sprintf("%s.exe", program)
+		ex, err = findExecutableNoExe(exe)
+		if err != nil {
+			return ex, nil
+		}
 	}
+	return findExecutableNoExe(program)
+}
+
+func findExecutableNoExe(program string) (string, error) {
+
 	// look in the same directory
 	cwd, err := os.Getwd()
 	if err != nil {

tests/integration/integration_nodejs_test.go

@@ -1147,13 +1147,6 @@ func TestAboutNodeJS(t *testing.T) {
 		}
 	}()
 	e.ImportDirectory(dir)
-	if runtime.GOOS == WindowsOS {
-		// Because there is a package-lock.json file, and we delete the yarn
-		// file, pulumi will use the package-lock file for the about.
-		assert.NoError(t, os.Remove(filepath.Join(e.RootPath, "yarn.lock")),
-			"removing yarn.lock")
-	}
-
 	e.RunCommand("yarn", "link", "@pulumi/pulumi")
 	e.RunCommand("yarn", "install")
 	e.RunCommand("pulumi", "login", "--cloud-url", e.LocalURL())