Make mtime flag enum

executor/cmd/root.go

@@ -33,7 +33,7 @@ var (
 	dockerfilePath string
 	destination    string
 	srcContext     string
-	mtime          bool
+	mtime          string
 	logLevel       string
 )
 
@@ -41,7 +41,7 @@ func init() {
 	RootCmd.PersistentFlags().StringVarP(&dockerfilePath, "dockerfile", "f", "/workspace/Dockerfile", "Path to the dockerfile to be built.")
 	RootCmd.PersistentFlags().StringVarP(&srcContext, "context", "c", "", "Path to the dockerfile build context.")
 	RootCmd.PersistentFlags().StringVarP(&destination, "destination", "d", "", "Registry the final image should be pushed to (ex: gcr.io/test/example:latest)")
-	RootCmd.PersistentFlags().BoolVarP(&mtime, "mtime", "", false, "Only look at mtime of a file when snapshotting")
+	RootCmd.PersistentFlags().StringVarP(&mtime, "mtime", "", "full", "Set this flag to change the file attributes inspected during snapshotting")
 	RootCmd.PersistentFlags().StringVarP(&logLevel, "verbosity", "v", constants.DefaultLogLevel, "Log level (debug, info, warn, error, fatal, panic")
 }
 
@@ -76,12 +76,8 @@ func execute() error {
 	if err := util.ExtractFileSystemFromImage(baseImage); err != nil {
 		return err
 	}
-	hasher := util.Hasher()
+
-	if mtime {
+	l := snapshot.NewLayeredMap(getHasher())
-		logrus.Info("Only file modification times will be considered when snapshotting.")
-		hasher = util.MtimeHasher()
-	}
-	l := snapshot.NewLayeredMap(hasher)
 	snapshotter := snapshot.NewSnapshotter(l, constants.RootDir)
 
 	// Take initial snapshot
@@ -131,3 +127,11 @@ func execute() error {
 	// Push the image
 	return image.PushImage(sourceImage, destination)
 }
+
+func getHasher() func(string) (string, error) {
+	if mtime == "time" {
+		logrus.Info("Only file modification time will be considered when snapshotting")
+		return util.MtimeHasher()
+	}
+	return util.Hasher()
+}

integration_tests/integration_test_yaml.go

@@ -28,7 +28,7 @@ var fileTests = []struct {
 	configPath     string
 	context        string
 	repo           string
-	mtime          bool
+	mtime          string
 }{
 	{
 		description:    "test extract filesystem",
@@ -36,7 +36,7 @@ var fileTests = []struct {
 		configPath:     "/workspace/integration_tests/dockerfiles/config_test_extract_fs.json",
 		context:        "integration_tests/dockerfiles/",
 		repo:           "extract-filesystem",
-		mtime:          true,
+		mtime:          "time",
 	},
 	{
 		description:    "test run",
@@ -51,7 +51,7 @@ var fileTests = []struct {
 		configPath:     "/workspace/integration_tests/dockerfiles/config_test_run_2.json",
 		context:        "integration_tests/dockerfiles/",
 		repo:           "test-run-2",
-		mtime:          true,
+		mtime:          "time",
 	},
 	{
 		description:    "test copy",
@@ -59,7 +59,7 @@ var fileTests = []struct {
 		configPath:     "/workspace/integration_tests/dockerfiles/config_test_copy.json",
 		context:        "/workspace/integration_tests/",
 		repo:           "test-copy",
-		mtime:          true,
+		mtime:          "time",
 	},
 }
 
@@ -144,8 +144,8 @@ func main() {
 		// Then, buld the image with kbuild
 		kbuildImage := testRepo + kbuildPrefix + test.repo
 		mtime := ""
-		if test.mtime {
+		if test.mtime != "" {
-			mtime = "--mtime"
+			mtime = "--mtime=" + test.mtime
 		}
 		kbuild := step{
 			Name: executorImage,