refactor(config): make config its own package

Refactor config into its own package. Trying to tease the config from
the server so that all of the control surfaces are exposed in the Server
for easier testing.

config/config.go

@@ -1,4 +1,4 @@
-package server
+package config
 
 import (
 	"encoding/json"
@@ -15,6 +15,8 @@ import (
 
 	"github.com/coreos/etcd/third_party/github.com/BurntSushi/toml"
 	"github.com/coreos/etcd/log"
+	"github.com/coreos/etcd/server"
+	ustrings "github.com/coreos/etcd/pkg/strings"
 )
 
 // The default location for the etcd configuration file.
@@ -82,8 +84,8 @@ type Config struct {
 	GraphiteHost	string	`toml:"graphite_host" env:"ETCD_GRAPHITE_HOST"`
 }
 
-// NewConfig returns a Config initialized with default values.
+// New returns a Config initialized with default values.
-func NewConfig() *Config {
+func New() *Config {
 	c := new(Config)
 	c.SystemPath = DefaultSystemConfigPath
 	c.Addr = "127.0.0.1:4001"
@@ -197,7 +199,7 @@ func (c *Config) loadEnv(target interface{}) error {
 		case reflect.String:
 			value.Field(i).SetString(v)
 		case reflect.Slice:
-			value.Field(i).Set(reflect.ValueOf(trimsplit(v, ",")))
+			value.Field(i).Set(reflect.ValueOf(ustrings.TrimSplit(v, ",")))
 		}
 	}
 	return nil
@@ -293,10 +295,10 @@ func (c *Config) LoadFlags(arguments []string) error {
 
 	// Convert some parameters to lists.
 	if peers != "" {
-		c.Peers = trimsplit(peers, ",")
+		c.Peers = ustrings.TrimSplit(peers, ",")
 	}
 	if cors != "" {
-		c.CorsOrigins = trimsplit(cors, ",")
+		c.CorsOrigins = ustrings.TrimSplit(cors, ",")
 	}
 
 	return nil
@@ -312,7 +314,7 @@ func (c *Config) LoadPeersFile() error {
 	if err != nil {
 		return fmt.Errorf("Peers file error: %s", err)
 	}
-	c.Peers = trimsplit(string(b), ",")
+	c.Peers = ustrings.TrimSplit(string(b), ",")
 
 	return nil
 }
@@ -355,8 +357,8 @@ func (c *Config) Reset() error {
 }
 
 // Reads the info file from the file system or initializes it based on the config.
-func (c *Config) Info() (*Info, error) {
+func (c *Config) Info() (*server.Info, error) {
-	info := &Info{}
+	info := &server.Info{}
 	path := filepath.Join(c.DataDir, "info")
 
 	// Open info file and read it out.
@@ -434,8 +436,8 @@ func (c *Config) Sanitize() error {
 }
 
 // TLSInfo retrieves a TLSInfo object for the client server.
-func (c *Config) TLSInfo() TLSInfo {
+func (c *Config) TLSInfo() server.TLSInfo {
-	return TLSInfo{
+	return server.TLSInfo{
 		CAFile:		c.CAFile,
 		CertFile:	c.CertFile,
 		KeyFile:	c.KeyFile,
@@ -443,13 +445,13 @@ func (c *Config) TLSInfo() TLSInfo {
 }
 
 // ClientTLSConfig generates the TLS configuration for the client server.
-func (c *Config) TLSConfig() (TLSConfig, error) {
+func (c *Config) TLSConfig() (server.TLSConfig, error) {
 	return c.TLSInfo().Config()
 }
 
 // PeerTLSInfo retrieves a TLSInfo object for the peer server.
-func (c *Config) PeerTLSInfo() TLSInfo {
+func (c *Config) PeerTLSInfo() server.TLSInfo {
-	return TLSInfo{
+	return server.TLSInfo{
 		CAFile:		c.Peer.CAFile,
 		CertFile:	c.Peer.CertFile,
 		KeyFile:	c.Peer.KeyFile,
@@ -457,7 +459,7 @@ func (c *Config) PeerTLSInfo() TLSInfo {
 }
 
 // PeerTLSConfig generates the TLS configuration for the peer server.
-func (c *Config) PeerTLSConfig() (TLSConfig, error) {
+func (c *Config) PeerTLSConfig() (server.TLSConfig, error) {
 	return c.PeerTLSInfo().Config()
 }
 

config/config_test.go

@@ -1,4 +1,4 @@
-package server
+package config
 
 import (
 	"io/ioutil"

config/timeout.go

@@ -1,4 +1,4 @@
-package server
+package config
 
 const (
 	// The amount of time (in ms) to elapse without a heartbeat before becoming a candidate

etcd.go

@@ -27,6 +27,7 @@ import (
 	"github.com/coreos/etcd/third_party/github.com/coreos/raft"
 
 	ehttp "github.com/coreos/etcd/http"
+	"github.com/coreos/etcd/config"
 	"github.com/coreos/etcd/log"
 	"github.com/coreos/etcd/metrics"
 	"github.com/coreos/etcd/server"
@@ -35,7 +36,7 @@ import (
 
 func main() {
 	// Load configuration.
-	var config = server.NewConfig()
+	var config = config.New()
 	if err := config.Load(os.Args[1:]); err != nil {
 		fmt.Println(server.Usage() + "\n")
 		fmt.Println(err.Error() + "\n")

pkg/strings/string.go

@@ -0,0 +1,16 @@
+package string
+
+import (
+	"strings"
+)
+
+// TrimSplit slices s into all substrings separated by sep and returns a
+// slice of the substrings between the separator with all leading and trailing
+// white space removed, as defined by Unicode.
+func TrimSplit(s, sep string) []string {
+	trimmed := strings.Split(s, sep)
+	for i := range trimmed {
+		trimmed[i] = strings.TrimSpace(trimmed[i])
+	}
+	return trimmed
+}