Misc. small changes/refactoring (#712)

cmd/executor/cmd/root.go

@@ -208,12 +208,12 @@ func resolveSourceContext() error {
 	}
 	if opts.Bucket != "" {
 		if !strings.Contains(opts.Bucket, "://") {
+			// if no prefix use Google Cloud Storage as default for backwards compatibility
 			opts.SrcContext = constants.GCSBuildContextPrefix + opts.Bucket
 		} else {
 			opts.SrcContext = opts.Bucket
 		}
 	}
-	// if no prefix use Google Cloud Storage as default for backwards compatibility
 	contextExecutor, err := buildcontext.GetBuildContext(opts.SrcContext)
 	if err != nil {
 		return err

pkg/commands/add.go

@@ -43,7 +43,7 @@ type AddCommand struct {
 // 		- If remote file has HTTP Last-Modified header, we set the mtime of the file to that timestamp
 // 		- If dest doesn't end with a slash, the filepath is inferred to be <dest>/<filename>
 // 	2. If <src> is a local tar archive:
-// 		-If <src> is a local tar archive, it is unpacked at the dest, as 'tar -x' would
+// 		- it is unpacked at the dest, as 'tar -x' would
 func (a *AddCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.BuildArgs) error {
 	replacementEnvs := buildArgs.ReplacementEnvs(config.Env)
 

pkg/commands/expose.go

@@ -54,7 +54,7 @@ func (r *ExposeCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.
 		}
 		protocol := strings.Split(p, "/")[1]
 		if !validProtocol(protocol) {
-			return fmt.Errorf("Invalid protocol: %s", protocol)
+			return fmt.Errorf("invalid protocol: %s", protocol)
 		}
 		logrus.Infof("Adding exposed port: %s", p)
 		existingPorts[p] = struct{}{}

pkg/commands/volume.go

@@ -54,7 +54,7 @@ func (v *VolumeCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.
 		if _, err := os.Stat(volume); os.IsNotExist(err) {
 			logrus.Infof("Creating directory %s", volume)
 			if err := os.MkdirAll(volume, 0755); err != nil {
-				return fmt.Errorf("Could not create directory for volume %s: %s", volume, err)
+				return fmt.Errorf("could not create directory for volume %s: %s", volume, err)
 			}
 		}
 	}

pkg/dockerfile/dockerfile.go

@@ -111,7 +111,7 @@ func Parse(b []byte) ([]instructions.Stage, []instructions.ArgCommand, error) {
 	if err != nil {
 		return nil, nil, err
 	}
-	return stages, metaArgs, err
+	return stages, metaArgs, nil
 }
 
 // targetStage returns the index of the target stage kaniko is trying to build

pkg/snapshot/layered_map.go

@@ -103,13 +103,13 @@ func (l *LayeredMap) Add(s string) error {
 	// Use hash function and add to layers
 	newV, err := l.hasher(s)
 	if err != nil {
-		return fmt.Errorf("Error creating hash for %s: %v", s, err)
+		return fmt.Errorf("error creating hash for %s: %v", s, err)
 	}
 	l.layers[len(l.layers)-1][s] = newV
 	return nil
 }
 
-// CheckFileChange checkes whether a given file changed
+// CheckFileChange checks whether a given file changed
 // from the current layered map by its hashing function.
 // Returns true if the file is changed.
 func (l *LayeredMap) CheckFileChange(s string) (bool, error) {

pkg/snapshot/snapshot.go

@@ -80,7 +80,7 @@ func (s *Snapshotter) TakeSnapshot(files []string) (string, error) {
 	// Add files to the layered map
 	for _, file := range filesToAdd {
 		if err := s.l.Add(file); err != nil {
-			return "", fmt.Errorf("Unable to add file %s to layered map: %s", file, err)
+			return "", fmt.Errorf("unable to add file %s to layered map: %s", file, err)
 		}
 	}
 
@@ -183,13 +183,13 @@ func (s *Snapshotter) scanFullFilesystem() ([]string, []string, error) {
 		}
 	}
 
-	// Also add parent directories to keep the permission of them correctly.
+	// Also add parent directories to keep their permissions correctly.
 	filesToAdd = filesWithParentDirs(filesToAdd)
 
 	// Add files to the layered map
 	for _, file := range filesToAdd {
 		if err := s.l.Add(file); err != nil {
-			return nil, nil, fmt.Errorf("Unable to add file %s to layered map: %s", file, err)
+			return nil, nil, fmt.Errorf("unable to add file %s to layered map: %s", file, err)
 		}
 	}
 

pkg/util/command_util.go

@@ -55,7 +55,7 @@ func ResolveEnvironmentReplacementList(values, envs []string, isFilepath bool) (
 
 // ResolveEnvironmentReplacement resolves replacing env variables in some text from envs
 // It takes in a string representation of the command, the value to be resolved, and a list of envs (config.Env)
-// Ex: fp = $foo/newdir, envs = [foo=/foodir], then this should return /foodir/newdir
+// Ex: value = $foo/newdir, envs = [foo=/foodir], then this should return /foodir/newdir
 // The dockerfile/shell package handles processing env values
 // It handles escape characters and supports expansion from the config.Env array
 // Shlex handles some of the following use cases (these and more are tested in integration tests)
@@ -325,13 +325,12 @@ func GetUserFromUsername(userStr string, groupStr string) (string, string, error
 	// Lookup by username
 	userObj, err := user.Lookup(userStr)
 	if err != nil {
-		if _, ok := err.(user.UnknownUserError); ok {
-			// Lookup by id
-			userObj, err = user.LookupId(userStr)
-			if err != nil {
-				return "", "", err
-			}
-		} else {
+		if _, ok := err.(user.UnknownUserError); !ok {
+			return "", "", err
+		}
+		// Lookup by id
+		userObj, err = user.LookupId(userStr)
+		if err != nil {
 			return "", "", err
 		}
 	}
@@ -341,12 +340,11 @@ func GetUserFromUsername(userStr string, groupStr string) (string, string, error
 	if groupStr != "" {
 		group, err = user.LookupGroup(groupStr)
 		if err != nil {
-			if _, ok := err.(user.UnknownGroupError); ok {
-				group, err = user.LookupGroupId(groupStr)
-				if err != nil {
-					return "", "", err
-				}
-			} else {
+			if _, ok := err.(user.UnknownGroupError); !ok {
+				return "", "", err
+			}
+			group, err = user.LookupGroupId(groupStr)
+			if err != nil {
 				return "", "", err
 			}
 		}

pkg/util/fs_util.go

@@ -188,7 +188,7 @@ func extractFile(dest string, hdr *tar.Header, tr io.Reader) error {
 	switch hdr.Typeflag {
 	case tar.TypeReg:
 		logrus.Debugf("creating file %s", path)
-		// It's possible a file is in the tar before it's directory.
+		// It's possible a file is in the tar before its directory.
 		if _, err := os.Stat(dir); os.IsNotExist(err) {
 			logrus.Debugf("base %s for file %s does not exist. Creating.", base, path)
 			if err := os.MkdirAll(dir, 0755); err != nil {
@@ -288,12 +288,7 @@ func checkWhitelistRoot(root string) bool {
 	if root == constants.RootDir {
 		return false
 	}
-	for _, wl := range whitelist {
-		if HasFilepathPrefix(root, wl.Path, wl.PrefixMatchOnly) {
-			return true
-		}
-	}
-	return false
+	return CheckWhitelist(root)
 }
 
 // Get whitelist from roots of mounted files