compile: fix export artifact when contins folder

Author: alessio-perugini

Diff for: commands/service_compile.go

@@ -404,6 +404,7 @@ func (s *arduinoCoreServerImpl) Compile(req *rpc.CompileRequest, stream rpc.Ardu
 				return &cmderrors.PermissionDeniedError{Message: i18n.Tr("Error reading build directory"), Cause: err}
 			}
 			buildFiles.FilterPrefix(baseName)
+			buildFiles.FilterOutDirs()
 			for _, buildFile := range buildFiles {
 				exportedFile := exportPath.Join(buildFile.Base())
 				logrus.WithField("src", buildFile).WithField("dest", exportedFile).Trace("Copying artifact.")

Diff for: internal/integrationtest/compile_1/compile_test.go

@@ -1321,3 +1321,35 @@ func buildWithCustomBuildPathAndOUtputDirFlag(t *testing.T, env *integrationtest
 		require.NotEmpty(t, content)
 	}
 }
+
+func TestCompileWithOutputDirFlagIgnoringFoldersCreatedByEsp32RainMakerLib(t *testing.T) {
+	env, cli := integrationtest.CreateArduinoCLIWithEnvironment(t)
+	defer env.CleanUp()
+
+	_, _, err := cli.Run("update")
+	require.NoError(t, err)
+
+	// Update index with esp32 core and install it
+	url := "https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
+	_, _, err = cli.Run("core", "update-index", "--additional-urls="+url)
+	require.NoError(t, err)
+	_, _, err = cli.Run("core", "install", "esp32:[email protected]", "--additional-urls="+url)
+	require.NoError(t, err)
+
+	sketchName := "RainMakerSketch"
+	sketchPath := cli.SketchbookDir().Join(sketchName)
+	_, _, err = cli.Run("sketch", "new", sketchPath.String())
+	require.NoError(t, err)
+
+	err = sketchPath.Join("RainMakerSketch.ino").WriteFile([]byte(`
+		#include "RMaker.h"
+		void setup() { }
+		void loop() { }`,
+	))
+	require.NoError(t, err)
+
+	outputDir := cli.SketchbookDir().Join("test_dir", "output_dir")
+	_, stderr, err := cli.Run("compile", "-b", "esp32:esp32:esp32", sketchPath.String(), "--output-dir", outputDir.String())
+	require.NoError(t, err)
+	require.NotContains(t, stderr, []byte("Error during build: Error copying output file"))
+}