Move ParseDockerDaemonHost to opts/ package.

This function was only being used from a single place opts/opts.go. This
change moves it from a incohesive package (parsers) to the single place it
is used.

Also made a bunch of the helper methods private because they are not used
by any external modules.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

parsers/parsers.go

@@ -5,111 +5,11 @@ package parsers
 
 import (
 	"fmt"
-	"net"
-	"net/url"
 	"path"
-	"runtime"
 	"strconv"
 	"strings"
 )
 
-// ParseDockerDaemonHost parses the specified address and returns an address that will be used as the host.
-// Depending of the address specified, will use the defaultTCPAddr or defaultUnixAddr
-// defaultUnixAddr must be a absolute file path (no `unix://` prefix)
-// defaultTCPAddr must be the full `tcp://host:port` form
-func ParseDockerDaemonHost(defaultTCPAddr, defaultTLSHost, defaultUnixAddr, defaultAddr, addr string) (string, error) {
-	addr = strings.TrimSpace(addr)
-	if addr == "" {
-		if defaultAddr == defaultTLSHost {
-			return defaultTLSHost, nil
-		}
-		if runtime.GOOS != "windows" {
-			return fmt.Sprintf("unix://%s", defaultUnixAddr), nil
-		}
-		return defaultTCPAddr, nil
-	}
-	addrParts := strings.Split(addr, "://")
-	if len(addrParts) == 1 {
-		addrParts = []string{"tcp", addrParts[0]}
-	}
-
-	switch addrParts[0] {
-	case "tcp":
-		return ParseTCPAddr(addrParts[1], defaultTCPAddr)
-	case "unix":
-		return ParseUnixAddr(addrParts[1], defaultUnixAddr)
-	case "fd":
-		return addr, nil
-	default:
-		return "", fmt.Errorf("Invalid bind address format: %s", addr)
-	}
-}
-
-// ParseUnixAddr parses and validates that the specified address is a valid UNIX
-// socket address. It returns a formatted UNIX socket address, either using the
-// address parsed from addr, or the contents of defaultAddr if addr is a blank
-// string.
-func ParseUnixAddr(addr string, defaultAddr string) (string, error) {
-	addr = strings.TrimPrefix(addr, "unix://")
-	if strings.Contains(addr, "://") {
-		return "", fmt.Errorf("Invalid proto, expected unix: %s", addr)
-	}
-	if addr == "" {
-		addr = defaultAddr
-	}
-	return fmt.Sprintf("unix://%s", addr), nil
-}
-
-// ParseTCPAddr parses and validates that the specified address is a valid TCP
-// address. It returns a formatted TCP address, either using the address parsed
-// from tryAddr, or the contents of defaultAddr if tryAddr is a blank string.
-// tryAddr is expected to have already been Trim()'d
-// defaultAddr must be in the full `tcp://host:port` form
-func ParseTCPAddr(tryAddr string, defaultAddr string) (string, error) {
-	if tryAddr == "" || tryAddr == "tcp://" {
-		return defaultAddr, nil
-	}
-	addr := strings.TrimPrefix(tryAddr, "tcp://")
-	if strings.Contains(addr, "://") || addr == "" {
-		return "", fmt.Errorf("Invalid proto, expected tcp: %s", tryAddr)
-	}
-
-	defaultAddr = strings.TrimPrefix(defaultAddr, "tcp://")
-	defaultHost, defaultPort, err := net.SplitHostPort(defaultAddr)
-	if err != nil {
-		return "", err
-	}
-	// url.Parse fails for trailing colon on IPv6 brackets on Go 1.5, but
-	// not 1.4. See https://github.com/golang/go/issues/12200 and
-	// https://github.com/golang/go/issues/6530.
-	if strings.HasSuffix(addr, "]:") {
-		addr += defaultPort
-	}
-
-	u, err := url.Parse("tcp://" + addr)
-	if err != nil {
-		return "", err
-	}
-
-	host, port, err := net.SplitHostPort(u.Host)
-	if err != nil {
-		return "", fmt.Errorf("Invalid bind address format: %s", tryAddr)
-	}
-
-	if host == "" {
-		host = defaultHost
-	}
-	if port == "" {
-		port = defaultPort
-	}
-	p, err := strconv.Atoi(port)
-	if err != nil && p == 0 {
-		return "", fmt.Errorf("Invalid bind address format: %s", tryAddr)
-	}
-
-	return fmt.Sprintf("tcp://%s%s", net.JoinHostPort(host, port), u.Path), nil
-}
-
 // PartParser parses and validates the specified string (data) using the specified template
 // e.g. ip:public:private -> 192.168.0.1:80:8000
 func PartParser(template, data string) (map[string]string, error) {