read support for length and offset

context.go

@@ -1,6 +1,11 @@
 package main
 
-import ()
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/restic/restic/backend"
+)
 
 // A Context specifies the root directory where all repositories are stored
 type Context struct {
@@ -8,10 +13,18 @@ type Context struct {
 }
 
 func NewContext(path string) Context {
-	return Context{path}
+	return Context{filepath.Clean(path)}
 }
 
 // Creates the file structure of the Context
-func (c *Context) Init() {
-
+func (c *Context) Init() error {
+	if _, err := os.Stat(c.path); err != nil {
+		return os.MkdirAll(c.path, backend.Modes.Dir)
+	}
+	return nil
+}
+
+func (c *Context) Repository(name string) (Repository, error) {
+	name, err := ParseRepositoryName(name)
+	return Repository{filepath.Join(c.path, name)}, err
 }