lfs: implement HTTP routes (#6035)

* Bootstrap with GORM

* Fix lint error

* Set conn max lifetime to one minute

* Fallback to use gorm v1

* Define HTTP routes

* Finish authentication

* Save token updated

* Add docstring

* Finish authorization

* serveBatch rundown

* Define types in lfsutil

* Finish Batch

* authutil

* Finish basic

* Formalize response error

* Fix lint errors

* authutil: add tests

* dbutil: add tests

* lfsutil: add tests

* strutil: add tests

* Formalize 401 response

1 files changed, 29 insertions, 0 deletions

diff --git a/internal/lfsutil/storage.go b/internal/lfsutil/storage.go
new file mode 100644
index 00000000..fa10ee03
--- /dev/null
+++ b/internal/lfsutil/storage.go
@@ -0,0 +1,29 @@
+// Copyright 2020 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package lfsutil
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+// Storage is the storage type of an LFS object.
+type Storage string
+
+const (
+	StorageLocal Storage = "local"
+)
+
+// StorageLocalPath returns computed file path for storing object on local file system.
+// It returns empty string if given "oid" isn't valid.
+func StorageLocalPath(root string, oid OID) string {
+	if !ValidOID(oid) {
+		return ""
+	}
+
+	// Valid OID is guaranteed to have second element as hash.
+	hash := strings.SplitN(string(oid), ":", 2)[1]
+	return filepath.Join(root, string(hash[0]), string(hash[1]), hash)
+}