Correct style.

cmd/ipfs/config.go

@@ -49,7 +49,7 @@ func configCmd(c *commander.Command, inp []string) error {
 		return err
 	}
 
-	filename, err := config.GetConfigFilePath(confdir)
+	filename, err := config.Filename(confdir)
 	if err != nil {
 		return err
 	}

cmd/ipfs/init.go

@@ -39,7 +39,7 @@ func initCmd(c *commander.Command, inp []string) error {
 	}
 
 	u.POut("initializing ipfs node at %s\n", configpath)
-	filename, err := config.GetConfigFilePath(configpath)
+	filename, err := config.Filename(configpath)
 	if err != nil {
 		return errors.New("Couldn't get home directory path")
 	}
@@ -63,11 +63,10 @@ func initCmd(c *commander.Command, inp []string) error {
 
 	cfg.Datastore = config.Datastore{}
 	if len(dspath) == 0 {
-		dspath, err = config.GetDefaultPathRoot()
+		dspath, err = config.DataStorePath("")
 		if err != nil {
 			return err
 		}
-		dspath = dspath + "/datastore"
 	}
 	cfg.Datastore.Path = dspath
 	cfg.Datastore.Type = "leveldb"

cmd/ipfs/ipfs.go

@@ -53,7 +53,7 @@ Use "ipfs help <command>" for more information about a command.
 }
 
 func init() {
-	config, err := config.GetDefaultPathRoot()
+	config, err := config.PathRoot()
 	if err != nil {
 		config = ""
 	}
@@ -78,7 +78,7 @@ func main() {
 }
 
 func localNode(confdir string, online bool) (*core.IpfsNode, error) {
-	filename, err := config.GetConfigFilePath(confdir)
+	filename, err := config.Filename(confdir)
 	if err != nil {
 		return nil, err
 	}
@@ -96,14 +96,14 @@ func localNode(confdir string, online bool) (*core.IpfsNode, error) {
 func getConfigDir(c *commander.Command) (string, error) {
 	conf := c.Flag.Lookup("c").Value.Get()
 	if conf == nil {
-		return config.GetDefaultPathRoot()
+		return config.PathRoot()
 	}
 	confStr, ok := conf.(string)
 	if !ok {
 		return "", errors.New("failed to retrieve config flag value.")
 	}
 	if len(confStr) == 0 {
-		return config.GetDefaultPathRoot()
+		return config.PathRoot()
 	}
 
 	return u.TildeExpansion(confStr)

config/config.go

@@ -6,6 +6,7 @@ import (
 	"encoding/base64"
 	"errors"
 	"os"
+	"path/filepath"
 
 	u "github.com/jbenet/go-ipfs/util"
 )
@@ -42,27 +43,44 @@ type Config struct {
 	Bootstrap []*BootstrapPeer // local nodes's bootstrap peers
 }
 
-// Return the default configuration root directory
-func GetDefaultPathRoot() (string, error) {
-	dir := os.Getenv("IPFS_CONFIG_DIR")
+const DefaultPathRoot = "~/.go-ipfs"
+const DefaultConfigFile = "config"
+const DefaultDataStoreDirectory = "datastore"
+const EnvDir = "IPFS_DIR"
+
+// PathRoot returns the default configuration root directory
+func PathRoot() (string, error) {
+	dir := os.Getenv(EnvDir)
 	var err error
 	if len(dir) == 0 {
-		dir, err = u.TildeExpansion("~/.go-ipfs")
+		dir, err = u.TildeExpansion(DefaultPathRoot)
 	}
 	return dir, err
 }
 
-// Return the configuration file path given a configuration root directory
-// If the configuration root directory is empty, use the default one
-func GetConfigFilePath(configroot string) (string, error) {
+// Path returns the path `extension` relative to the configuration root. If an
+// empty string is provided for `configroot`, the default root is used.
+func Path(configroot, extension string) (string, error) {
 	if len(configroot) == 0 {
-		dir, err := GetDefaultPathRoot()
-		return dir+"/config", err
+		dir, err := PathRoot()
+		return filepath.Join(dir, extension), err
 	} else {
-		return configroot+"/config", nil
+		return filepath.Join(configroot, extension), nil
 	}
 }
 
+// DataStorePath returns the default data store path given a configuration root
+// (set an empty string to have the default configuration root)
+func DataStorePath(configroot string) (string, error) {
+	return Path(configroot, DefaultDataStoreDirectory);
+}
+
+// Filename returns the configuration file path given a configuration root
+// directory. If the configuration root directory is empty, use the default one
+func Filename(configroot string) (string, error) {
+	return Path(configroot, DefaultConfigFile);
+}
+
 // DecodePrivateKey is a helper to decode the users PrivateKey
 func (i *Identity) DecodePrivateKey(passphrase string) (crypto.PrivateKey, error) {
 	pkb, err := base64.StdEncoding.DecodeString(i.PrivKey)