Create new branch from branch selection dropdown (#2130)

* Create new branch from branch selection dropdown and rewrite it to VueJS

* Make updateLocalCopyToCommit as not exported

* Move branch name validation to model

* Fix possible race condition

1 files changed, 49 insertions, 0 deletions

diff --git a/routers/repo/branch.go b/routers/repo/branch.go
index fcb6efd010..5d67f9eb03 100644
--- a/routers/repo/branch.go
+++ b/routers/repo/branch.go
@@ -5,6 +5,8 @@
 package repo
 
 import (
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/auth"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 )
@@ -30,3 +32,50 @@ func Branches(ctx *context.Context) {
 	ctx.Data["Branches"] = brs
 	ctx.HTML(200, tplBranch)
 }
+
+// CreateBranch creates new branch in repository
+func CreateBranch(ctx *context.Context, form auth.NewBranchForm) {
+	if !ctx.Repo.CanCreateBranch() {
+		ctx.Handle(404, "CreateBranch", nil)
+		return
+	}
+
+	if ctx.HasError() {
+		ctx.Flash.Error(ctx.GetErrMsg())
+		ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchName)
+		return
+	}
+
+	var err error
+	if ctx.Repo.IsViewBranch {
+		err = ctx.Repo.Repository.CreateNewBranch(ctx.User, ctx.Repo.BranchName, form.NewBranchName)
+	} else {
+		err = ctx.Repo.Repository.CreateNewBranchFromCommit(ctx.User, ctx.Repo.BranchName, form.NewBranchName)
+	}
+	if err != nil {
+		if models.IsErrTagAlreadyExists(err) {
+			e := err.(models.ErrTagAlreadyExists)
+			ctx.Flash.Error(ctx.Tr("repo.branch.tag_collision", e.TagName))
+			ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchName)
+			return
+		}
+		if models.IsErrBranchAlreadyExists(err) {
+			e := err.(models.ErrBranchAlreadyExists)
+			ctx.Flash.Error(ctx.Tr("repo.branch.branch_already_exists", e.BranchName))
+			ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchName)
+			return
+		}
+		if models.IsErrBranchNameConflict(err) {
+			e := err.(models.ErrBranchNameConflict)
+			ctx.Flash.Error(ctx.Tr("repo.branch.branch_name_conflict", form.NewBranchName, e.BranchName))
+			ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchName)
+			return
+		}
+
+		ctx.Handle(500, "CreateNewBranch", err)
+		return
+	}
+
+	ctx.Flash.Success(ctx.Tr("repo.branch.create_success", form.NewBranchName))
+	ctx.Redirect(ctx.Repo.RepoLink + "/src/" + form.NewBranchName)
+}