add "git-lfs not installed" error

Author: bl00mber

models/error.go

@@ -56,6 +56,20 @@ func (err ErrNamePatternNotAllowed) Error() string {
 	return fmt.Sprintf("name pattern is not allowed [pattern: %s]", err.Pattern)
 }
 
+// ErrLFSNotInstalled represents an "git-lfs not found" error.
+type ErrLFSNotInstalled struct {
+}
+
+// IsLFSNotInstalled checks if an error is an ErrLFSNotInstalled.
+func IsLFSNotInstalled(err error) bool {
+	_, ok := err.(ErrLFSNotInstalled)
+	return ok
+}
+
+func (err ErrLFSNotInstalled) Error() string {
+	return "git-lfs not found"
+}
+
 // ErrNameCharsNotAllowed represents a "character not allowed in name" error.
 type ErrNameCharsNotAllowed struct {
 	Name string

models/repo.go

@@ -18,6 +18,7 @@ import (
 	"net"
 	"net/url"
 	"os"
+	"os/exec"
 	"path"
 	"path/filepath"
 	"sort"
@@ -935,7 +936,7 @@ func (repo *Repository) CloneLink() (cl *CloneLink) {
 }
 
 // CheckCreateRepository check if could created a repository
-func CheckCreateRepository(doer, u *User, name string, overwriteOrAdopt bool) error {
+func CheckCreateRepository(doer, u *User, name string, lfs bool, overwriteOrAdopt bool) error {
 	if !doer.CanCreateRepo() {
 		return ErrReachLimitOfRepo{u.MaxRepoCreation}
 	}
@@ -959,6 +960,12 @@ func CheckCreateRepository(doer, u *User, name string, overwriteOrAdopt bool) er
 	if !overwriteOrAdopt && isExist {
 		return ErrRepoFilesAlreadyExist{u.Name, name}
 	}
+
+	if lfs {
+		if _, err := exec.LookPath("git-lfs"); err != nil {
+			return ErrLFSNotInstalled{}
+		}
+	}
 	return nil
 }
 

options/locale/locale_en-US.ini

@@ -392,6 +392,7 @@ user_not_exist = The user does not exist.
 team_not_exist = The team does not exist.
 last_org_owner = You cannot remove the last user from the 'owners' team. There must be at least one owner for an organization.
 cannot_add_org_to_team = An organization cannot be added as a team member.
+lfs_not_installed = Please <a rel="noreferrer" href="https://git-lfs.github.com">install</a> git-lfs.
 
 invalid_ssh_key = Can not verify your SSH key: %s
 invalid_gpg_key = Can not verify your GPG key: %s

routers/repo/migrate.go

@@ -101,6 +101,9 @@ func handleMigrateError(ctx *context.Context, owner *models.User, err error, nam
 	case models.IsErrNamePatternNotAllowed(err):
 		ctx.Data["Err_RepoName"] = true
 		ctx.RenderWithErr(ctx.Tr("repo.form.name_pattern_not_allowed", err.(models.ErrNamePatternNotAllowed).Pattern), tpl, form)
+	case models.IsLFSNotInstalled(err):
+		ctx.Data["Err_LFSNotInstalled"] = true
+		ctx.RenderWithErr(ctx.Tr("form.lfs_not_installed"), tpl, form)
 	default:
 		remoteAddr, _ := auth.ParseRemoteAddr(form.CloneAddr, form.AuthUsername, form.AuthPassword, owner)
 		err = util.URLSanitizedError(err, remoteAddr)
@@ -194,7 +197,7 @@ func MigratePost(ctx *context.Context) {
 		opts.Releases = false
 	}
 
-	err = models.CheckCreateRepository(ctx.User, ctxUser, opts.RepoName, false)
+	err = models.CheckCreateRepository(ctx.User, ctxUser, opts.RepoName, opts.LFS, false)
 	if err != nil {
 		handleMigrateError(ctx, ctxUser, err, "MigratePost", tpl, form)
 		return