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>

integrations/api_repo_lfs_migrate_test.go

@@ -0,0 +1,49 @@
+// Copyright 2021 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 integrations
+
+import (
+	"net/http"
+	"path"
+	"testing"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/lfs"
+	"code.gitea.io/gitea/modules/setting"
+	api "code.gitea.io/gitea/modules/structs"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAPIRepoLFSMigrateLocal(t *testing.T) {
+	defer prepareTestEnv(t)()
+
+	oldImportLocalPaths := setting.ImportLocalPaths
+	oldAllowLocalNetworks := setting.Migrations.AllowLocalNetworks
+	setting.ImportLocalPaths = true
+	setting.Migrations.AllowLocalNetworks = true
+
+	user := models.AssertExistsAndLoadBean(t, &models.User{ID: 1}).(*models.User)
+	session := loginUser(t, user.Name)
+	token := getTokenForLoggedInUser(t, session)
+
+	req := NewRequestWithJSON(t, "POST", "/api/v1/repos/migrate?token="+token, &api.MigrateRepoOptions{
+		CloneAddr:   path.Join(setting.RepoRootPath, "migration/lfs-test.git"),
+		RepoOwnerID: user.ID,
+		RepoName:    "lfs-test-local",
+		LFS:         true,
+	})
+	resp := MakeRequest(t, req, NoExpectedStatus)
+	assert.EqualValues(t, http.StatusCreated, resp.Code)
+
+	store := lfs.NewContentStore()
+	ok, _ := store.Verify(lfs.Pointer{Oid: "fb8f7d8435968c4f82a726a92395be4d16f2f63116caf36c8ad35c60831ab041", Size: 6})
+	assert.True(t, ok)
+	ok, _ = store.Verify(lfs.Pointer{Oid: "d6f175817f886ec6fbbc1515326465fa96c3bfd54a4ea06cfd6dbbd8340e0152", Size: 6})
+	assert.True(t, ok)
+
+	setting.ImportLocalPaths = oldImportLocalPaths
+	setting.Migrations.AllowLocalNetworks = oldAllowLocalNetworks
+}

integrations/git_test.go

@@ -18,6 +18,7 @@ import (
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/lfs"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
@@ -218,7 +219,7 @@ func rawTest(t *testing.T, ctx *APITestContext, little, big, littleLFS, bigLFS s
 			assert.NotEqual(t, littleSize, resp.Body.Len())
 			assert.LessOrEqual(t, resp.Body.Len(), 1024)
 			if resp.Body.Len() != littleSize && resp.Body.Len() <= 1024 {
-				assert.Contains(t, resp.Body.String(), models.LFSMetaFileIdentifier)
+				assert.Contains(t, resp.Body.String(), lfs.MetaFileIdentifier)
 			}
 		}
 
@@ -232,7 +233,7 @@ func rawTest(t *testing.T, ctx *APITestContext, little, big, littleLFS, bigLFS s
 				resp := session.MakeRequest(t, req, http.StatusOK)
 				assert.NotEqual(t, bigSize, resp.Body.Len())
 				if resp.Body.Len() != bigSize && resp.Body.Len() <= 1024 {
-					assert.Contains(t, resp.Body.String(), models.LFSMetaFileIdentifier)
+					assert.Contains(t, resp.Body.String(), lfs.MetaFileIdentifier)
 				}
 			}
 		}

integrations/gitea-repositories-meta/migration/lfs-test.git/HEAD

@@ -0,0 +1 @@
+ref: refs/heads/master

integrations/gitea-repositories-meta/migration/lfs-test.git/config

@@ -0,0 +1,7 @@
+[core]
+	bare = false
+	repositoryformatversion = 0
+	filemode = false
+	symlinks = false
+	ignorecase = true
+	logallrefupdates = true

integrations/gitea-repositories-meta/migration/lfs-test.git/description

@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.

integrations/gitea-repositories-meta/migration/lfs-test.git/hooks/post-checkout

@@ -0,0 +1,3 @@
+#!/bin/sh
+command -v git-lfs >/dev/null 2>&1 || { echo >&2 "\nThis repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this hook by deleting .git/hooks/post-checkout.\n"; exit 2; }
+git lfs post-checkout "$@"

integrations/gitea-repositories-meta/migration/lfs-test.git/hooks/post-commit

@@ -0,0 +1,3 @@
+#!/bin/sh
+command -v git-lfs >/dev/null 2>&1 || { echo >&2 "\nThis repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this hook by deleting .git/hooks/post-commit.\n"; exit 2; }
+git lfs post-commit "$@"

integrations/gitea-repositories-meta/migration/lfs-test.git/hooks/post-merge

@@ -0,0 +1,3 @@
+#!/bin/sh
+command -v git-lfs >/dev/null 2>&1 || { echo >&2 "\nThis repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this hook by deleting .git/hooks/post-merge.\n"; exit 2; }
+git lfs post-merge "$@"

integrations/gitea-repositories-meta/migration/lfs-test.git/hooks/pre-push

@@ -0,0 +1,3 @@
+#!/bin/sh
+command -v git-lfs >/dev/null 2>&1 || { echo >&2 "\nThis repository is configured for Git LFS but 'git-lfs' was not found on your path. If you no longer wish to use Git LFS, remove this hook by deleting .git/hooks/pre-push.\n"; exit 2; }
+git lfs pre-push "$@"

integrations/gitea-repositories-meta/migration/lfs-test.git/lfs/objects/d6/f1/d6f175817f886ec6fbbc1515326465fa96c3bfd54a4ea06cfd6dbbd8340e0152

@@ -0,0 +1 @@
+dummy2

integrations/gitea-repositories-meta/migration/lfs-test.git/lfs/objects/fb/8f/fb8f7d8435968c4f82a726a92395be4d16f2f63116caf36c8ad35c60831ab041

@@ -0,0 +1 @@
+dummy1

integrations/gitea-repositories-meta/migration/lfs-test.git/refs/heads/master

@@ -0,0 +1 @@
+546244003622c64b2fc3c2cd544d7a29882c8383

integrations/lfs_getobject_test.go

@@ -7,9 +7,6 @@ package integrations
 import (
 	"archive/zip"
 	"bytes"
-	"crypto/sha256"
-	"encoding/hex"
-	"io"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
@@ -18,46 +15,36 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/lfs"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/routers/routes"
 
 	gzipp "github.com/klauspost/compress/gzip"
 	"github.com/stretchr/testify/assert"
 )
 
-func GenerateLFSOid(content io.Reader) (string, error) {
-	h := sha256.New()
-	if _, err := io.Copy(h, content); err != nil {
-		return "", err
-	}
-	sum := h.Sum(nil)
-	return hex.EncodeToString(sum), nil
-}
-
 var lfsID = int64(20000)
 
 func storeObjectInRepo(t *testing.T, repositoryID int64, content *[]byte) string {
-	oid, err := GenerateLFSOid(bytes.NewReader(*content))
+	pointer, err := lfs.GeneratePointer(bytes.NewReader(*content))
 	assert.NoError(t, err)
 	var lfsMetaObject *models.LFSMetaObject
 
 	if setting.Database.UsePostgreSQL {
-		lfsMetaObject = &models.LFSMetaObject{ID: lfsID, Oid: oid, Size: int64(len(*content)), RepositoryID: repositoryID}
+		lfsMetaObject = &models.LFSMetaObject{ID: lfsID, Pointer: pointer, RepositoryID: repositoryID}
 	} else {
-		lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(*content)), RepositoryID: repositoryID}
+		lfsMetaObject = &models.LFSMetaObject{Pointer: pointer, RepositoryID: repositoryID}
 	}
 
 	lfsID++
 	lfsMetaObject, err = models.NewLFSMetaObject(lfsMetaObject)
 	assert.NoError(t, err)
-	contentStore := &lfs.ContentStore{ObjectStorage: storage.LFS}
-	exist, err := contentStore.Exists(lfsMetaObject)
+	contentStore := lfs.NewContentStore()
+	exist, err := contentStore.Exists(pointer)
 	assert.NoError(t, err)
 	if !exist {
-		err := contentStore.Put(lfsMetaObject, bytes.NewReader(*content))
+		err := contentStore.Put(pointer, bytes.NewReader(*content))
 		assert.NoError(t, err)
 	}
-	return oid
+	return pointer.Oid
 }
 
 func storeAndGetLfs(t *testing.T, content *[]byte, extraHeader *http.Header, expectedStatus int) *httptest.ResponseRecorder {

integrations/lfs_local_endpoint_test.go

@@ -0,0 +1,117 @@
+// Copyright 2021 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 integrations
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/url"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"code.gitea.io/gitea/modules/lfs"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func str2url(raw string) *url.URL {
+	u, _ := url.Parse(raw)
+	return u
+}
+
+func TestDetermineLocalEndpoint(t *testing.T) {
+	defer prepareTestEnv(t)()
+
+	root, _ := ioutil.TempDir("", "lfs_test")
+	defer os.RemoveAll(root)
+
+	rootdotgit, _ := ioutil.TempDir("", "lfs_test")
+	defer os.RemoveAll(rootdotgit)
+	os.Mkdir(filepath.Join(rootdotgit, ".git"), 0700)
+
+	lfsroot, _ := ioutil.TempDir("", "lfs_test")
+	defer os.RemoveAll(lfsroot)
+
+	// Test cases
+	var cases = []struct {
+		cloneurl string
+		lfsurl   string
+		expected *url.URL
+	}{
+		// case 0
+		{
+			cloneurl: root,
+			lfsurl:   "",
+			expected: str2url(fmt.Sprintf("file://%s", root)),
+		},
+		// case 1
+		{
+			cloneurl: root,
+			lfsurl:   lfsroot,
+			expected: str2url(fmt.Sprintf("file://%s", lfsroot)),
+		},
+		// case 2
+		{
+			cloneurl: "https://git.com/repo.git",
+			lfsurl:   lfsroot,
+			expected: str2url(fmt.Sprintf("file://%s", lfsroot)),
+		},
+		// case 3
+		{
+			cloneurl: rootdotgit,
+			lfsurl:   "",
+			expected: str2url(fmt.Sprintf("file://%s", filepath.Join(rootdotgit, ".git"))),
+		},
+		// case 4
+		{
+			cloneurl: "",
+			lfsurl:   rootdotgit,
+			expected: str2url(fmt.Sprintf("file://%s", filepath.Join(rootdotgit, ".git"))),
+		},
+		// case 5
+		{
+			cloneurl: rootdotgit,
+			lfsurl:   rootdotgit,
+			expected: str2url(fmt.Sprintf("file://%s", filepath.Join(rootdotgit, ".git"))),
+		},
+		// case 6
+		{
+			cloneurl: fmt.Sprintf("file://%s", root),
+			lfsurl:   "",
+			expected: str2url(fmt.Sprintf("file://%s", root)),
+		},
+		// case 7
+		{
+			cloneurl: fmt.Sprintf("file://%s", root),
+			lfsurl:   fmt.Sprintf("file://%s", lfsroot),
+			expected: str2url(fmt.Sprintf("file://%s", lfsroot)),
+		},
+		// case 8
+		{
+			cloneurl: root,
+			lfsurl:   fmt.Sprintf("file://%s", lfsroot),
+			expected: str2url(fmt.Sprintf("file://%s", lfsroot)),
+		},
+		// case 9
+		{
+			cloneurl: "",
+			lfsurl:   "/does/not/exist",
+			expected: nil,
+		},
+		// case 10
+		{
+			cloneurl: "",
+			lfsurl:   "file:///does/not/exist",
+			expected: str2url("file:///does/not/exist"),
+		},
+	}
+
+	for n, c := range cases {
+		ep := lfs.DetermineEndpoint(c.cloneurl, c.lfsurl)
+
+		assert.Equal(t, c.expected, ep, "case %d: error should match", n)
+	}
+}