Remove useless New*Opt functions, singleline Opt types

buildfile.go

@@ -241,7 +241,7 @@ func (b *buildFile) CmdVolume(args string) error {
 		volume = []string{args}
 	}
 	if b.config.Volumes == nil {
-		b.config.Volumes = NewPathOpts()
+		b.config.Volumes = PathOpts{}
 	}
 	for _, v := range volume {
 		b.config.Volumes[v] = struct{}{}

commands.go

@@ -1632,15 +1632,7 @@ type ports []int
 // AttachOpts stores arguments to 'docker run -a', eg. which streams to attach to
 type AttachOpts map[string]bool
 
-func NewAttachOpts() AttachOpts {
-	return make(AttachOpts)
-}
-
-func (opts AttachOpts) String() string {
-	// Cast to underlying map type to avoid infinite recursion
-	return fmt.Sprintf("%v", map[string]bool(opts))
-}
-
+func (opts AttachOpts) String() string { return fmt.Sprintf("%v", map[string]bool(opts)) }
 func (opts AttachOpts) Set(val string) error {
 	if val != "stdin" && val != "stdout" && val != "stderr" {
 		return fmt.Errorf("Unsupported stream name: %s", val)
@@ -1649,18 +1641,10 @@ func (opts AttachOpts) Set(val string) error {
 	return nil
 }
 
-func (opts AttachOpts) Get(val string) bool {
-	if res, exists := opts[val]; exists {
-		return res
-	}
-	return false
-}
-
+// LinkOpts stores arguments to `docker run -link`
 type LinkOpts []string
 
-func (link LinkOpts) String() string {
-	return fmt.Sprintf("%v", []string(link))
-}
+func (link LinkOpts) String() string { return fmt.Sprintf("%v", []string(link)) }
 func (link LinkOpts) Set(val string) error {
 	if _, err := parseLink(val); err != nil {
 		return err
@@ -1671,14 +1655,7 @@ func (link LinkOpts) Set(val string) error {
 // PathOpts stores a unique set of absolute paths
 type PathOpts map[string]struct{}
 
-func NewPathOpts() PathOpts {
-	return make(PathOpts)
-}
-
-func (opts PathOpts) String() string {
-	return fmt.Sprintf("%v", map[string]struct{}(opts))
-}
-
+func (opts PathOpts) String() string { return fmt.Sprintf("%v", map[string]struct{}(opts)) }
 func (opts PathOpts) Set(val string) error {
 	var containerPath string
 
@@ -1744,8 +1721,8 @@ func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig,
 func parseRun(cmd *flag.FlagSet, args []string, capabilities *Capabilities) (*Config, *HostConfig, *flag.FlagSet, error) {
 	var (
 		// FIXME: use utils.ListOpts for attach and volumes?
-		flAttach  = NewAttachOpts()
-		flVolumes = NewPathOpts()
+		flAttach  = AttachOpts{}
+		flVolumes = PathOpts{}
 		flLinks   = LinkOpts{}
 
 		flPublish     utils.ListOpts
@@ -1777,6 +1754,7 @@ func parseRun(cmd *flag.FlagSet, args []string, capabilities *Capabilities) (*Co
 
 	cmd.Var(flAttach, "a", "Attach to stdin, stdout or stderr.")
 	cmd.Var(flVolumes, "v", "Bind mount a volume (e.g. from the host: -v /host:/container, from docker: -v /container)")
+	cmd.Var(flLinks, "link", "Add link to another container (name:alias)")
 
 	cmd.Var(&flPublish, "p", fmt.Sprintf("Publish a container's port to the host (format: %s) (use 'docker port' to see the actual mapping)", PortSpecTemplateFormat))
 	cmd.Var(&flExpose, "expose", "Expose a port from the container without publishing it to your host")
@@ -1784,7 +1762,6 @@ func parseRun(cmd *flag.FlagSet, args []string, capabilities *Capabilities) (*Co
 	cmd.Var(&flDns, "dns", "Set custom dns servers")
 	cmd.Var(&flVolumesFrom, "volumes-from", "Mount volumes from the specified container(s)")
 	cmd.Var(&flLxcOpts, "lxc-conf", "Add custom lxc options -lxc-conf=\"lxc.cgroup.cpuset.cpus = 0,1\"")
-	cmd.Var(&flLinks, "link", "Add link to another container (name:alias)")
 
 	if err := cmd.Parse(args); err != nil {
 		return nil, nil, cmd, err
@@ -1910,9 +1887,9 @@ func parseRun(cmd *flag.FlagSet, args []string, capabilities *Capabilities) (*Co
 		OpenStdin:       *flStdin,
 		Memory:          flMemory,
 		CpuShares:       *flCpuShares,
-		AttachStdin:     flAttach.Get("stdin"),
-		AttachStdout:    flAttach.Get("stdout"),
-		AttachStderr:    flAttach.Get("stderr"),
+		AttachStdin:     flAttach["stdin"],
+		AttachStdout:    flAttach["stdout"],
+		AttachStderr:    flAttach["stderr"],
 		Env:             envs,
 		Cmd:             runCmd,
 		Dns:             flDns,