golint: use golint to check package util

Signed-off-by: Hu Keping <hukeping@huawei.com>

utils/experimental.go

@@ -2,6 +2,8 @@
 
 package utils
 
+// ExperimentalBuild is a stub which always returns true for
+// builds that include the "experimental" build tag
 func ExperimentalBuild() bool {
 	return true
 }

utils/git.go

@@ -14,6 +14,8 @@ import (
 	"github.com/docker/docker/pkg/urlutil"
 )
 
+// GitClone clones a repository into a newly created directory which
+// will be under "docker-build-git"
 func GitClone(remoteURL string) (string, error) {
 	if !urlutil.IsGitTransport(remoteURL) {
 		remoteURL = "https://" + remoteURL

utils/stubs.go

@@ -2,6 +2,8 @@
 
 package utils
 
+// ExperimentalBuild is a stub which always returns false for
+// builds that do not include the "experimental" build tag
 func ExperimentalBuild() bool {
 	return false
 }

utils/utils.go

@@ -19,7 +19,7 @@ import (
 	"github.com/docker/docker/pkg/stringid"
 )
 
-// Figure out the absolute path of our own binary (if it's still around).
+// SelfPath figures out the absolute path of our own binary (if it's still around).
 func SelfPath() string {
 	path, err := exec.LookPath(os.Args[0])
 	if err != nil {
@@ -79,7 +79,7 @@ func isValidDockerInitPath(target string, selfPath string) bool { // target and
 	return dockerversion.INITSHA1 != "" && dockerInitSha1(target) == dockerversion.INITSHA1
 }
 
-// Figure out the path of our dockerinit (which may be SelfPath())
+// DockerInitPath figures out the path of our dockerinit (which may be SelfPath())
 func DockerInitPath(localCopy string) string {
 	selfPath := SelfPath()
 	if isValidDockerInitPath(selfPath, selfPath) {
@@ -157,7 +157,7 @@ func GetCallerName(depth int) string {
 	return callerShortName
 }
 
-// ReplaceOrAppendValues returns the defaults with the overrides either
+// ReplaceOrAppendEnvValues returns the defaults with the overrides either
 // replaced by env key or appended to the list
 func ReplaceOrAppendEnvValues(defaults, overrides []string) []string {
 	cache := make(map[string]int, len(defaults))
@@ -239,7 +239,7 @@ func ValidateContextDirectory(srcPath string, excludes []string) error {
 	})
 }
 
-// Reads a .dockerignore file and returns the list of file patterns
+// ReadDockerIgnore reads a .dockerignore file and returns the list of file patterns
 // to ignore. Note this will trim whitespace from each line as well
 // as use GO's "clean" func to get the shortest/cleanest path for each.
 func ReadDockerIgnore(path string) ([]string, error) {