LFS support to be stored on minio (#12518)

* LFS support to be stored on minio

* Fix test

* Fix lint

* Fix lint

* Fix check

* Fix test

* Update documents and add migration for LFS

* Fix some bugs

1 files changed, 122 insertions, 0 deletions

diff --git a/modules/setting/lfs.go b/modules/setting/lfs.go
new file mode 100644
index 0000000000..a740a6d629
--- /dev/null
+++ b/modules/setting/lfs.go
@@ -0,0 +1,122 @@
+// Copyright 2019 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 setting
+
+import (
+	"encoding/base64"
+	"os"
+	"path/filepath"
+	"time"
+
+	"code.gitea.io/gitea/modules/generate"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+
+	"github.com/unknwon/com"
+	ini "gopkg.in/ini.v1"
+)
+
+// LFS represents the configuration for Git LFS
+var LFS = struct {
+	StartServer     bool          `ini:"LFS_START_SERVER"`
+	ContentPath     string        `ini:"LFS_CONTENT_PATH"`
+	JWTSecretBase64 string        `ini:"LFS_JWT_SECRET"`
+	JWTSecretBytes  []byte        `ini:"-"`
+	HTTPAuthExpiry  time.Duration `ini:"LFS_HTTP_AUTH_EXPIRY"`
+	MaxFileSize     int64         `ini:"LFS_MAX_FILE_SIZE"`
+	LocksPagingNum  int           `ini:"LFS_LOCKS_PAGING_NUM"`
+
+	StoreType   string
+	ServeDirect bool
+	Minio       struct {
+		Endpoint        string
+		AccessKeyID     string
+		SecretAccessKey string
+		UseSSL          bool
+		Bucket          string
+		Location        string
+		BasePath        string
+	}
+}{
+	StoreType: "local",
+}
+
+func newLFSService() {
+	sec := Cfg.Section("server")
+	if err := sec.MapTo(&LFS); err != nil {
+		log.Fatal("Failed to map LFS settings: %v", err)
+	}
+
+	LFS.ContentPath = sec.Key("LFS_CONTENT_PATH").MustString(filepath.Join(AppDataPath, "lfs"))
+	if !filepath.IsAbs(LFS.ContentPath) {
+		LFS.ContentPath = filepath.Join(AppWorkPath, LFS.ContentPath)
+	}
+	if LFS.LocksPagingNum == 0 {
+		LFS.LocksPagingNum = 50
+	}
+
+	LFS.HTTPAuthExpiry = sec.Key("LFS_HTTP_AUTH_EXPIRY").MustDuration(20 * time.Minute)
+
+	if LFS.StartServer {
+		LFS.JWTSecretBytes = make([]byte, 32)
+		n, err := base64.RawURLEncoding.Decode(LFS.JWTSecretBytes, []byte(LFS.JWTSecretBase64))
+
+		if err != nil || n != 32 {
+			LFS.JWTSecretBase64, err = generate.NewJwtSecret()
+			if err != nil {
+				log.Fatal("Error generating JWT Secret for custom config: %v", err)
+				return
+			}
+
+			// Save secret
+			cfg := ini.Empty()
+			if com.IsFile(CustomConf) {
+				// Keeps custom settings if there is already something.
+				if err := cfg.Append(CustomConf); err != nil {
+					log.Error("Failed to load custom conf '%s': %v", CustomConf, err)
+				}
+			}
+
+			cfg.Section("server").Key("LFS_JWT_SECRET").SetValue(LFS.JWTSecretBase64)
+
+			if err := os.MkdirAll(filepath.Dir(CustomConf), os.ModePerm); err != nil {
+				log.Fatal("Failed to create '%s': %v", CustomConf, err)
+			}
+			if err := cfg.SaveTo(CustomConf); err != nil {
+				log.Fatal("Error saving generated JWT Secret to custom config: %v", err)
+				return
+			}
+		}
+	}
+}
+
+func ensureLFSDirectory() {
+	if LFS.StartServer {
+		if err := os.MkdirAll(LFS.ContentPath, 0700); err != nil {
+			log.Fatal("Failed to create '%s': %v", LFS.ContentPath, err)
+		}
+	}
+}
+
+// CheckLFSVersion will check lfs version, if not satisfied, then disable it.
+func CheckLFSVersion() {
+	if LFS.StartServer {
+		//Disable LFS client hooks if installed for the current OS user
+		//Needs at least git v2.1.2
+
+		err := git.LoadGitVersion()
+		if err != nil {
+			log.Fatal("Error retrieving git version: %v", err)
+		}
+
+		if git.CheckGitVersionConstraint(">= 2.1.2") != nil {
+			LFS.StartServer = false
+			log.Error("LFS server support needs at least Git v2.1.2")
+		} else {
+			git.GlobalCommandArgs = append(git.GlobalCommandArgs, "-c", "filter.lfs.required=",
+				"-c", "filter.lfs.smudge=", "-c", "filter.lfs.clean=")
+		}
+	}
+}