Add LFS Migration and Mirror (#14726)

* Implemented LFS client.

* Implemented scanning for pointer files.

* Implemented downloading of lfs files.

* Moved model-dependent code into services.

* Removed models dependency. Added TryReadPointerFromBuffer.

* Migrated code from service to module.

* Centralised storage creation.

* Removed dependency from models.

* Moved ContentStore into modules.

* Share structs between server and client.

* Moved method to services.

* Implemented lfs download on clone.

* Implemented LFS sync on clone and mirror update.

* Added form fields.

* Updated templates.

* Fixed condition.

* Use alternate endpoint.

* Added missing methods.

* Fixed typo and make linter happy.

* Detached pointer parser from gogit dependency.

* Fixed TestGetLFSRange test.

* Added context to support cancellation.

* Use ReadFull to probably read more data.

* Removed duplicated code from models.

* Moved scan implementation into pointer_scanner_nogogit.

* Changed method name.

* Added comments.

* Added more/specific log/error messages.

* Embedded lfs.Pointer into models.LFSMetaObject.

* Moved code from models to module.

* Moved code from models to module.

* Moved code from models to module.

* Reduced pointer usage.

* Embedded type.

* Use promoted fields.

* Fixed unexpected eof.

* Added unit tests.

* Implemented migration of local file paths.

* Show an error on invalid LFS endpoints.

* Hide settings if not used.

* Added LFS info to mirror struct.

* Fixed comment.

* Check LFS endpoint.

* Manage LFS settings from mirror page.

* Fixed selector.

* Adjusted selector.

* Added more tests.

* Added local filesystem migration test.

* Fixed typo.

* Reset settings.

* Added special windows path handling.

* Added unit test for HTTPClient.

* Added unit test for BasicTransferAdapter.

* Moved into util package.

* Test if LFS endpoint is allowed.

* Added support for git://

* Just use a static placeholder as the displayed url may be invalid.

* Reverted to original code.

* Added "Advanced Settings".

* Updated wording.

* Added discovery info link.

* Implemented suggestion.

* Fixed missing format parameter.

* Added Pointer.IsValid().

* Always remove model on error.

* Added suggestions.

* Use channel instead of array.

* Update routers/repo/migrate.go

* fmt

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: zeripath <art27@cantab.net>

1 files changed, 69 insertions, 0 deletions

diff --git a/modules/lfs/shared.go b/modules/lfs/shared.go
new file mode 100644
index 0000000000..70b76d7512
--- /dev/null
+++ b/modules/lfs/shared.go
@@ -0,0 +1,69 @@
+// Copyright 2020 The Gitea 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 lfs
+
+import (
+	"time"
+)
+
+const (
+	// MediaType contains the media type for LFS server requests
+	MediaType = "application/vnd.git-lfs+json"
+)
+
+// BatchRequest contains multiple requests processed in one batch operation.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#requests
+type BatchRequest struct {
+	Operation string     `json:"operation"`
+	Transfers []string   `json:"transfers,omitempty"`
+	Ref       *Reference `json:"ref,omitempty"`
+	Objects   []Pointer  `json:"objects"`
+}
+
+// Reference contains a git reference.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#ref-property
+type Reference struct {
+	Name string `json:"name"`
+}
+
+// Pointer contains LFS pointer data
+type Pointer struct {
+	Oid  string `json:"oid" xorm:"UNIQUE(s) INDEX NOT NULL"`
+	Size int64  `json:"size" xorm:"NOT NULL"`
+}
+
+// BatchResponse contains multiple object metadata Representation structures
+// for use with the batch API.
+// https://github.com/git-lfs/git-lfs/blob/main/docs/api/batch.md#successful-responses
+type BatchResponse struct {
+	Transfer string            `json:"transfer,omitempty"`
+	Objects  []*ObjectResponse `json:"objects"`
+}
+
+// ObjectResponse is object metadata as seen by clients of the LFS server.
+type ObjectResponse struct {
+	Pointer
+	Actions map[string]*Link `json:"actions"`
+	Error   *ObjectError     `json:"error,omitempty"`
+}
+
+// Link provides a structure used to build a hypermedia representation of an HTTP link.
+type Link struct {
+	Href      string            `json:"href"`
+	Header    map[string]string `json:"header,omitempty"`
+	ExpiresAt time.Time         `json:"expires_at,omitempty"`
+}
+
+// ObjectError defines the JSON structure returned to the client in case of an error
+type ObjectError struct {
+	Code    int    `json:"code"`
+	Message string `json:"message"`
+}
+
+// PointerBlob associates a Git blob with a Pointer.
+type PointerBlob struct {
+	Hash string
+	Pointer
+}