From 6b6f7451a7e96ea16e084191393a63b11b3cef59 Mon Sep 17 00:00:00 2001
From: Christian Kemper <ckemper@gmail.com>
Date: Wed, 10 Feb 2016 23:06:10 -0800
Subject: [PATCH] Introduced Scheme constants for the different repository
 schemes.

---
 backend/local/config.go |  2 ++
 backend/s3/config.go    |  2 ++
 backend/sftp/config.go  |  2 ++
 cmd/restic/global.go    | 12 ++++++------
 location/location.go    | 10 +++++-----
 5 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/backend/local/config.go b/backend/local/config.go
index 456f3c428..59a7b1c89 100644
--- a/backend/local/config.go
+++ b/backend/local/config.go
@@ -5,6 +5,8 @@ import (
 	"strings"
 )
 
+const Scheme = "local"
+
 // ParseConfig parses a local backend config.
 func ParseConfig(cfg string) (interface{}, error) {
 	if !strings.HasPrefix(cfg, "local:") {
diff --git a/backend/s3/config.go b/backend/s3/config.go
index c02709ea1..750abd1ca 100644
--- a/backend/s3/config.go
+++ b/backend/s3/config.go
@@ -16,6 +16,8 @@ type Config struct {
 	Prefix	      string
 }
 
+const Scheme = "s3"
+
 const defaultPrefix = "restic"
 
 // ParseConfig parses the string s and extracts the s3 config. The two
diff --git a/backend/sftp/config.go b/backend/sftp/config.go
index ee241facb..7f7eeb5a0 100644
--- a/backend/sftp/config.go
+++ b/backend/sftp/config.go
@@ -11,6 +11,8 @@ type Config struct {
 	User, Host, Dir string
 }
 
+const Scheme = "sftp"
+
 // ParseConfig extracts all information for the sftp connection from the string s.
 func ParseConfig(s string) (interface{}, error) {
 	if strings.HasPrefix(s, "sftp://") {
diff --git a/cmd/restic/global.go b/cmd/restic/global.go
index 5d9875fce..04ed35544 100644
--- a/cmd/restic/global.go
+++ b/cmd/restic/global.go
@@ -186,13 +186,13 @@ func open(s string) (backend.Backend, error) {
 	}
 
 	switch loc.Scheme {
-	case "local":
+	case local.Scheme:
 		debug.Log("open", "opening local repository at %#v", loc.Config)
 		return local.Open(loc.Config.(string))
-	case "sftp":
+	case sftp.Scheme:
 		debug.Log("open", "opening sftp repository at %#v", loc.Config)
 		return sftp.OpenWithConfig(loc.Config.(sftp.Config))
-	case "s3":
+	case s3.Scheme:
 		cfg := loc.Config.(s3.Config)
 		if cfg.KeyID == "" {
 			cfg.KeyID = os.Getenv("AWS_ACCESS_KEY_ID")
@@ -219,13 +219,13 @@ func create(s string) (backend.Backend, error) {
 	}
 
 	switch loc.Scheme {
-	case "local":
+	case local.Scheme:
 		debug.Log("open", "create local repository at %#v", loc.Config)
 		return local.Create(loc.Config.(string))
-	case "sftp":
+	case sftp.Scheme:
 		debug.Log("open", "create sftp repository at %#v", loc.Config)
 		return sftp.CreateWithConfig(loc.Config.(sftp.Config))
-	case "s3":
+	case s3.Scheme:
 		cfg := loc.Config.(s3.Config)
 		if cfg.KeyID == "" {
 			cfg.KeyID = os.Getenv("AWS_ACCESS_KEY_ID")
diff --git a/location/location.go b/location/location.go
index 1f3aba1a4..14cdc97f0 100644
--- a/location/location.go
+++ b/location/location.go
@@ -24,9 +24,9 @@ type parser struct {
 // parsers is a list of valid config parsers for the backends. The first parser
 // is the fallback and should always be set to the local backend.
 var parsers = []parser{
-	{"local", local.ParseConfig},
-	{"sftp", sftp.ParseConfig},
-	{"s3", s3.ParseConfig},
+	{local.Scheme, local.ParseConfig},
+	{sftp.Scheme, sftp.ParseConfig},
+	{s3.Scheme, s3.ParseConfig},
 }
 
 // Parse extracts repository location information from the string s. If s
@@ -51,8 +51,8 @@ func Parse(s string) (u Location, err error) {
 	}
 
 	// try again, with the local parser and the prefix "local:"
-	u.Scheme = "local"
-	u.Config, err = local.ParseConfig("local:" + s)
+	u.Scheme = local.Scheme
+	u.Config, err = local.ParseConfig(local.Scheme + ":" + s)
 	if err != nil {
 		return Location{}, err
 	}