Revert "additional-whitelist"

This reverts commit ac8e123815.

README.md

@@ -63,7 +63,6 @@ _If you are interested in contributing to kaniko, see [DEVELOPMENT.md](DEVELOPME
     - [--single-snapshot](#--single-snapshot)
     - [--skip-tls-verify](#--skip-tls-verify)
     - [--skip-tls-verify-pull](#--skip-tls-verify-pull)
-    - [--additional-whitelist](#--additional-whitelist)
     - [--snapshotMode](#--snapshotmode)
     - [--target](#--target)
     - [--tarPath](#--tarpath)
@@ -494,9 +493,6 @@ Set this flag to skip TLS certificate validation when pushing to a registry. It
 
 Set this flag to skip TLS certificate validation when pulling from a registry. It is supposed to be used for testing purposes only and should not be used in production!
 
-#### --additional-whitelist
-Set this flag with a list of filepaths and Kaniko will ignore these paths during the build. Useful for improving build performance on large filesystems.
-
 #### --snapshotMode
 
 You can set the `--snapshotMode=<full (default), time>` flag to set how kaniko will snapshot the filesystem.

cmd/executor/cmd/root.go

@@ -75,6 +75,12 @@ var RootCmd = &cobra.Command{
 				return errors.New("You must provide --destination if setting ImageNameDigestFile")
 			}
 
+			if additionalWhitelist == nil {
+				additionalWhitelist = []string{
+					"/var/run",
+				}
+			}
+
 			for _, path := range additionalWhitelist {
 				util.AddToWhitelist(path)
 			}
@@ -152,7 +158,7 @@ func addKanikoOptionsFlags() {
 
 	// We use nil as the default value so we can differentiate between the flag passed
 	// with an empty list and the flag not set
-	RootCmd.PersistentFlags().StringSliceVar(&additionalWhitelist, "additional-whitelist", []string{}, "Paths to whitelist. These will be ignored by kaniko to improve performance.")
+	RootCmd.PersistentFlags().StringSliceVar(&additionalWhitelist, "additional-whitelist", nil, "Paths to whitelist. These will be ignored be kaniko to improve performance.")
 }
 
 // addHiddenFlags marks certain flags as hidden from the executor help text

pkg/util/fs_util_test.go

@@ -38,50 +38,6 @@ import (
 )
 
 func Test_DetectFilesystemWhitelist(t *testing.T) {
-	type testcase struct {
-		desc                string
-		additionalWhitelist []string
-		expectedWhitelist   []WhitelistEntry
-	}
-
-	expectedWhitelist := []WhitelistEntry{
-		{"/kaniko", false},
-		{"/proc", false},
-		{"/dev", false},
-		{"/dev/pts", false},
-		{"/sys", false},
-		{"/etc/mtab", false},
-	}
-
-	testCases := []testcase{
-		{
-			desc:              "no additional whitelist",
-			expectedWhitelist: expectedWhitelist,
-		},
-		{
-			desc:                "one additional whitelist - /var/run",
-			additionalWhitelist: []string{"/var/run"},
-			expectedWhitelist:   append(expectedWhitelist, WhitelistEntry{"/var/run", false}),
-		},
-		{
-			desc:                "two additional whitelist - /var/run, /usr/bin",
-			additionalWhitelist: []string{"/var/run", "/usr/bin"},
-			expectedWhitelist: append(
-				expectedWhitelist,
-				WhitelistEntry{"/var/run", false},
-				WhitelistEntry{"/usr/bin", false},
-			),
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.desc, func(t *testing.T) {
-			expectedWhitelist := tc.expectedWhitelist
-			additionalWhitelist := tc.additionalWhitelist
-
-			tmpWhitelist := make([]WhitelistEntry, len(initialWhitelist))
-			copy(tmpWhitelist, initialWhitelist)
-
 	testDir, err := ioutil.TempDir("", "")
 	if err != nil {
 		t.Fatalf("Error creating tempdir: %s", err)
@@ -101,33 +57,45 @@ func Test_DetectFilesystemWhitelist(t *testing.T) {
 		t.Fatalf("Error writing file contents to %s: %s", path, err)
 	}
 
-			for _, wl := range additionalWhitelist {
-				AddToWhitelist(wl)
-			}
-
 	err = DetectFilesystemWhitelist(path)
-			actualWhitelist := whitelist
-
-			if len(actualWhitelist) != len(expectedWhitelist) {
-				t.Errorf(
-					"expected whitelist to have %d items but was %d",
-					len(expectedWhitelist),
-					len(actualWhitelist),
-				)
+	expectedWhitelist := []WhitelistEntry{
+		{"/kaniko", false},
+		{"/proc", false},
+		{"/dev", false},
+		{"/dev/pts", false},
+		{"/sys", false},
+		{"/etc/mtab", false},
 	}
-
+	actualWhitelist := whitelist
 	sort.Slice(actualWhitelist, func(i, j int) bool {
 		return actualWhitelist[i].Path < actualWhitelist[j].Path
 	})
 	sort.Slice(expectedWhitelist, func(i, j int) bool {
 		return expectedWhitelist[i].Path < expectedWhitelist[j].Path
 	})
-
 	testutil.CheckErrorAndDeepEqual(t, false, err, expectedWhitelist, actualWhitelist)
 
-			initialWhitelist = tmpWhitelist
+	tmpInitial := make([]WhitelistEntry, len(initialWhitelist))
+
+	copy(tmpInitial, initialWhitelist)
+	defer func() {
+		initialWhitelist = tmpInitial
+	}()
+
+	AddToWhitelist("/var/run")
+
+	err = DetectFilesystemWhitelist(path)
+	expectedWhitelist = append(expectedWhitelist,
+		WhitelistEntry{"/var/run", false})
+
+	actualWhitelist = whitelist
+	sort.Slice(actualWhitelist, func(i, j int) bool {
+		return actualWhitelist[i].Path < actualWhitelist[j].Path
 	})
-	}
+	sort.Slice(expectedWhitelist, func(i, j int) bool {
+		return expectedWhitelist[i].Path < expectedWhitelist[j].Path
+	})
+	testutil.CheckErrorAndDeepEqual(t, false, err, expectedWhitelist, actualWhitelist)
 }
 
 var tests = []struct {