Add option to prohibit fork if user reached maximum limit of repositories

models/user/user.go

@@ -276,6 +276,12 @@ func (u *User) CanEditGitHook() bool {
 	return !setting.DisableGitHooks && (u.IsAdmin || u.AllowGitHook)
 }
 
+// CanForkRepo returns if user login can fork a repository
+// It checks especially that the user can create repos, and potentially more
+func (u *User) CanForkRepo() bool {
+	return u.CanCreateRepo()
+}
+
 // CanImportLocal returns true if user can migrate repository by local path.
 func (u *User) CanImportLocal() bool {
 	if !setting.ImportLocalPaths || u == nil {

routers/api/v1/repo/fork.go

@@ -142,7 +142,7 @@ func CreateFork(ctx *context.APIContext) {
 		Description: repo.Description,
 	})
 	if err != nil {
-		if repo_model.IsErrRepoAlreadyExist(err) {
+		if repo_model.IsErrReachLimitOfRepo(err) || repo_model.IsErrRepoAlreadyExist(err) {
 			ctx.Error(http.StatusConflict, "ForkRepository", err)
 		} else {
 			ctx.Error(http.StatusInternalServerError, "ForkRepository", err)

routers/web/repo/pull.go

@@ -183,6 +183,13 @@ func getForkRepository(ctx *context.Context) *repo_model.Repository {
 func Fork(ctx *context.Context) {
 	ctx.Data["Title"] = ctx.Tr("new_fork")
 
+	if !ctx.Doer.CanForkRepo() {
+		maxCreationLimit := ctx.Doer.MaxCreationLimit()
+		msg := ctx.TrN(maxCreationLimit, "repo.form.reach_limit_of_creation_1", "repo.form.reach_limit_of_creation_n", maxCreationLimit)
+		ctx.Data["Flash"] = ctx.Flash
+		ctx.Flash.Error(msg)
+	}
+
 	getForkRepository(ctx)
 	if ctx.Written() {
 		return
@@ -255,6 +262,10 @@ func ForkPost(ctx *context.Context) {
 	if err != nil {
 		ctx.Data["Err_RepoName"] = true
 		switch {
+		case repo_model.IsErrReachLimitOfRepo(err):
+			maxCreationLimit := ctxUser.MaxCreationLimit()
+			msg := ctx.TrN(maxCreationLimit, "repo.form.reach_limit_of_creation_1", "repo.form.reach_limit_of_creation_n", maxCreationLimit)
+			ctx.RenderWithErr(msg, tplFork, &form)
 		case repo_model.IsErrRepoAlreadyExist(err):
 			ctx.RenderWithErr(ctx.Tr("repo.settings.new_owner_has_same_repo"), tplFork, &form)
 		case db.IsErrNameReserved(err):

services/repository/fork.go

@@ -52,6 +52,13 @@ type ForkRepoOptions struct {
 
 // ForkRepository forks a repository
 func ForkRepository(ctx context.Context, doer, owner *user_model.User, opts ForkRepoOptions) (*repo_model.Repository, error) {
+	// Fork is prohibited, if user has reached maximum limit of repositories
+	if !owner.CanForkRepo() {
+		return nil, repo_model.ErrReachLimitOfRepo{
+			Limit: owner.MaxRepoCreation,
+		}
+	}
+
 	forkedRepo, err := repo_model.GetUserFork(ctx, opts.BaseRepo.ID, owner.ID)
 	if err != nil {
 		return nil, err

services/repository/fork_test.go

@@ -30,4 +30,16 @@ func TestForkRepository(t *testing.T) {
 	assert.Nil(t, fork)
 	assert.Error(t, err)
 	assert.True(t, IsErrForkAlreadyExist(err))
+
+	// user not reached maximum limit of repositories
+	assert.False(t, repo_model.IsErrReachLimitOfRepo(err))
+	// user has reached maximum limit of repositories
+	user.MaxRepoCreation = 0
+	fork2, err := ForkRepository(git.DefaultContext, user, user, ForkRepoOptions{
+		BaseRepo:    repo,
+		Name:        "test",
+		Description: "test",
+	})
+	assert.Nil(t, fork2)
+	assert.True(t, repo_model.IsErrReachLimitOfRepo(err))
 }

templates/repo/pulls/fork.tmpl

@@ -58,7 +58,7 @@
 
 					<div class="inline field">
 						<label></label>
-						<button class="ui green button">
+						<button class="ui green button{{if not .CanForkRepo}} disabled{{end}}">
 							{{.locale.Tr "repo.fork_repo"}}
 						</button>
 						<a class="ui button" href="{{.ForkRepo.Link}}">{{.locale.Tr "cancel"}}</a>