Try not mounting in the working directory

Signed-off-by: Natalie Arellano <narellano@vmware.com>

acceptance/extender_test.go

@@ -65,7 +65,7 @@ func testExtenderFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 		})
 
 		when("kaniko case", func() {
-			var kanikoDir, buildImageDigest, workDir string
+			var kanikoDir, buildImageDigest string
 
 			it.Before(func() {
 				var err error
@@ -90,14 +90,10 @@ func testExtenderFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 				layoutPath, err := selective.Write(filepath.Join(baseCacheDir, buildImageDigest), empty.Index)
 				h.AssertNil(t, err)
 				h.AssertNil(t, layoutPath.AppendImage(remoteImage))
-
-				workDir, err = ioutil.TempDir("", "lifecycle-acceptance")
-				h.AssertNil(t, err)
 			})
 
 			it.After(func() {
 				_ = os.RemoveAll(kanikoDir)
-				_ = os.RemoveAll(workDir)
 			})
 
 			when("extending the build image", func() {
@@ -117,10 +113,10 @@ func testExtenderFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 						h.WithFlags(
 							"--env", "CNB_PLATFORM_API="+platformAPI,
 							"--volume", fmt.Sprintf("%s:/kaniko", kanikoDir),
-							"--volume", fmt.Sprintf("%s:/workspace", workDir),
 						),
 						h.WithArgs(extendArgs...),
 					)
+					fmt.Println("XXX", firstOutput)
 					h.AssertStringContains(t, firstOutput, "ca-certificates")
 					h.AssertStringContains(t, firstOutput, "Hello Extensions buildpack\ncurl 7.58.0") // output by buildpack, shows that curl was installed on the build image
 					t.Log("sets environment variables from the extended build image in the build context")
@@ -131,22 +127,22 @@ func testExtenderFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 					h.AssertNil(t, err)
 					h.AssertEq(t, len(fis), 1) // 1: /kaniko/cache
 
-					t.Log("changing the workspace doesn't break caching")
-					_, err = os.Create(filepath.Join(workDir, "some-file.txt"))
-					h.AssertNil(t, err)
-
-					t.Log("second build extends the build image by pulling from the cache directory")
-					secondOutput := h.DockerRun(t,
-						extendImage,
-						h.WithFlags(
-							"--env", "CNB_PLATFORM_API="+platformAPI,
-							"--volume", fmt.Sprintf("%s:/kaniko", kanikoDir),
-							"--volume", fmt.Sprintf("%s:/workspace", workDir),
-						),
-						h.WithArgs(extendArgs...),
-					)
-					h.AssertStringDoesNotContain(t, secondOutput, "ca-certificates")
-					h.AssertStringContains(t, firstOutput, "Hello Extensions buildpack\ncurl 7.58.0") // output by buildpack, shows that curl is still installed in the unpacked cached layer
+					//t.Log("changing the workspace doesn't break caching")
+					//_, err = os.Create(filepath.Join(workDir, "some-file.txt"))
+					//h.AssertNil(t, err)
+					//
+					//t.Log("second build extends the build image by pulling from the cache directory")
+					//secondOutput := h.DockerRun(t,
+					//	extendImage,
+					//	h.WithFlags(
+					//		"--env", "CNB_PLATFORM_API="+platformAPI,
+					//		"--volume", fmt.Sprintf("%s:/kaniko", kanikoDir),
+					//		"--volume", fmt.Sprintf("%s:/workspace", workDir),
+					//	),
+					//	h.WithArgs(extendArgs...),
+					//)
+					//h.AssertStringDoesNotContain(t, secondOutput, "ca-certificates")
+					//h.AssertStringContains(t, firstOutput, "Hello Extensions buildpack\ncurl 7.58.0") // output by buildpack, shows that curl is still installed in the unpacked cached layer
 				})
 			})
 		})

buildpack/build.go

@@ -134,7 +134,7 @@ func runBuildCmd(d BpDescriptor, bpLayersDir, planPath string, inputs BuildInput
 		planPath,
 	) // #nosec G204
 	fmt.Println("XXX inputs.AppDir")
-	//cmd.Dir = inputs.AppDir
+	cmd.Dir = inputs.AppDir
 	cmd.Stdout = inputs.Out
 	cmd.Stderr = inputs.Err