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gitea/routers/repo/branch.go
zeripath 320031fce6
Handle more pathological branch and tag names (#11843) (#11863)
Backport #11843

It's possible to push quite pathological appearing branch names to gitea
using git push gitea reasonable-branch:refs/heads/-- at which point
large parts of the UI will break. Similarly you can git push origin
reasonable-tag:refs/tags/-- which wil return an error.

This PR fixes the problems these cause. It also changes the code from
creating branches to pushing to ensure that branch restoration has to
pass hooks.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-06-12 14:01:44 -04:00

374 lines
11 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Copyright 2018 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 repo
import (
"fmt"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/auth"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/repofiles"
repo_module "code.gitea.io/gitea/modules/repository"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/routers/utils"
)
const (
tplBranch base.TplName = "repo/branch/list"
)
// Branch contains the branch information
type Branch struct {
Name string
Commit *git.Commit
IsProtected bool
IsDeleted bool
IsIncluded bool
DeletedBranch *models.DeletedBranch
CommitsAhead int
CommitsBehind int
LatestPullRequest *models.PullRequest
MergeMovedOn bool
}
// Branches render repository branch page
func Branches(ctx *context.Context) {
ctx.Data["Title"] = "Branches"
ctx.Data["IsRepoToolbarBranches"] = true
ctx.Data["DefaultBranch"] = ctx.Repo.Repository.DefaultBranch
ctx.Data["AllowsPulls"] = ctx.Repo.Repository.AllowsPulls()
ctx.Data["IsWriter"] = ctx.Repo.CanWrite(models.UnitTypeCode)
ctx.Data["IsMirror"] = ctx.Repo.Repository.IsMirror
ctx.Data["CanPull"] = ctx.Repo.CanWrite(models.UnitTypeCode) || (ctx.IsSigned && ctx.User.HasForkedRepo(ctx.Repo.Repository.ID))
ctx.Data["PageIsViewCode"] = true
ctx.Data["PageIsBranches"] = true
ctx.Data["Branches"] = loadBranches(ctx)
ctx.HTML(200, tplBranch)
}
// DeleteBranchPost responses for delete merged branch
func DeleteBranchPost(ctx *context.Context) {
defer redirect(ctx)
branchName := ctx.Query("name")
if branchName == ctx.Repo.Repository.DefaultBranch {
ctx.Flash.Error(ctx.Tr("repo.branch.default_deletion_failed", branchName))
return
}
isProtected, err := ctx.Repo.Repository.IsProtectedBranch(branchName, ctx.User)
if err != nil {
log.Error("DeleteBranch: %v", err)
ctx.Flash.Error(ctx.Tr("repo.branch.deletion_failed", branchName))
return
}
if isProtected {
ctx.Flash.Error(ctx.Tr("repo.branch.protected_deletion_failed", branchName))
return
}
if !ctx.Repo.GitRepo.IsBranchExist(branchName) || branchName == ctx.Repo.Repository.DefaultBranch {
ctx.Flash.Error(ctx.Tr("repo.branch.deletion_failed", branchName))
return
}
if err := deleteBranch(ctx, branchName); err != nil {
ctx.Flash.Error(ctx.Tr("repo.branch.deletion_failed", branchName))
return
}
ctx.Flash.Success(ctx.Tr("repo.branch.deletion_success", branchName))
}
// RestoreBranchPost responses for delete merged branch
func RestoreBranchPost(ctx *context.Context) {
defer redirect(ctx)
branchID := ctx.QueryInt64("branch_id")
branchName := ctx.Query("name")
deletedBranch, err := ctx.Repo.Repository.GetDeletedBranchByID(branchID)
if err != nil {
log.Error("GetDeletedBranchByID: %v", err)
ctx.Flash.Error(ctx.Tr("repo.branch.restore_failed", branchName))
return
}
if err := git.Push(ctx.Repo.Repository.RepoPath(), git.PushOptions{
Remote: ctx.Repo.Repository.RepoPath(),
Branch: fmt.Sprintf("%s:%s%s", deletedBranch.Commit, git.BranchPrefix, deletedBranch.Name),
Env: models.PushingEnvironment(ctx.User, ctx.Repo.Repository),
}); err != nil {
if strings.Contains(err.Error(), "already exists") {
ctx.Flash.Error(ctx.Tr("repo.branch.already_exists", deletedBranch.Name))
return
}
log.Error("CreateBranch: %v", err)
ctx.Flash.Error(ctx.Tr("repo.branch.restore_failed", deletedBranch.Name))
return
}
// Don't return error below this
if err := repofiles.PushUpdate(
ctx.Repo.Repository,
deletedBranch.Name,
repofiles.PushUpdateOptions{
RefFullName: git.BranchPrefix + deletedBranch.Name,
OldCommitID: git.EmptySHA,
NewCommitID: deletedBranch.Commit,
PusherID: ctx.User.ID,
PusherName: ctx.User.Name,
RepoUserName: ctx.Repo.Owner.Name,
RepoName: ctx.Repo.Repository.Name,
}); err != nil {
log.Error("Update: %v", err)
}
ctx.Flash.Success(ctx.Tr("repo.branch.restore_success", deletedBranch.Name))
}
func redirect(ctx *context.Context) {
ctx.JSON(200, map[string]interface{}{
"redirect": ctx.Repo.RepoLink + "/branches",
})
}
func deleteBranch(ctx *context.Context, branchName string) error {
commit, err := ctx.Repo.GitRepo.GetBranchCommit(branchName)
if err != nil {
log.Error("GetBranchCommit: %v", err)
return err
}
if err := ctx.Repo.GitRepo.DeleteBranch(branchName, git.DeleteBranchOptions{
Force: true,
}); err != nil {
log.Error("DeleteBranch: %v", err)
return err
}
// Don't return error below this
if err := repofiles.PushUpdate(
ctx.Repo.Repository,
branchName,
repofiles.PushUpdateOptions{
RefFullName: git.BranchPrefix + branchName,
OldCommitID: commit.ID.String(),
NewCommitID: git.EmptySHA,
PusherID: ctx.User.ID,
PusherName: ctx.User.Name,
RepoUserName: ctx.Repo.Owner.Name,
RepoName: ctx.Repo.Repository.Name,
}); err != nil {
log.Error("Update: %v", err)
}
if err := ctx.Repo.Repository.AddDeletedBranch(branchName, commit.ID.String(), ctx.User.ID); err != nil {
log.Warn("AddDeletedBranch: %v", err)
}
return nil
}
func loadBranches(ctx *context.Context) []*Branch {
rawBranches, err := repo_module.GetBranches(ctx.Repo.Repository)
if err != nil {
ctx.ServerError("GetBranches", err)
return nil
}
protectedBranches, err := ctx.Repo.Repository.GetProtectedBranches()
if err != nil {
ctx.ServerError("GetProtectedBranches", err)
return nil
}
repoIDToRepo := map[int64]*models.Repository{}
repoIDToRepo[ctx.Repo.Repository.ID] = ctx.Repo.Repository
repoIDToGitRepo := map[int64]*git.Repository{}
repoIDToGitRepo[ctx.Repo.Repository.ID] = ctx.Repo.GitRepo
branches := make([]*Branch, len(rawBranches))
for i := range rawBranches {
commit, err := rawBranches[i].GetCommit()
if err != nil {
ctx.ServerError("GetCommit", err)
return nil
}
var isProtected bool
branchName := rawBranches[i].Name
for _, b := range protectedBranches {
if b.BranchName == branchName {
isProtected = true
break
}
}
divergence, divergenceError := repofiles.CountDivergingCommits(ctx.Repo.Repository, git.BranchPrefix+branchName)
if divergenceError != nil {
ctx.ServerError("CountDivergingCommits", divergenceError)
return nil
}
pr, err := models.GetLatestPullRequestByHeadInfo(ctx.Repo.Repository.ID, branchName)
if err != nil {
ctx.ServerError("GetLatestPullRequestByHeadInfo", err)
return nil
}
headCommit := commit.ID.String()
mergeMovedOn := false
if pr != nil {
pr.HeadRepo = ctx.Repo.Repository
if err := pr.LoadIssue(); err != nil {
ctx.ServerError("pr.LoadIssue", err)
return nil
}
if repo, ok := repoIDToRepo[pr.BaseRepoID]; ok {
pr.BaseRepo = repo
} else if err := pr.LoadBaseRepo(); err != nil {
ctx.ServerError("pr.LoadBaseRepo", err)
return nil
} else {
repoIDToRepo[pr.BaseRepoID] = pr.BaseRepo
}
pr.Issue.Repo = pr.BaseRepo
if pr.HasMerged {
baseGitRepo, ok := repoIDToGitRepo[pr.BaseRepoID]
if !ok {
baseGitRepo, err = git.OpenRepository(pr.BaseRepo.RepoPath())
if err != nil {
ctx.ServerError("OpenRepository", err)
return nil
}
defer baseGitRepo.Close()
repoIDToGitRepo[pr.BaseRepoID] = baseGitRepo
}
pullCommit, err := baseGitRepo.GetRefCommitID(pr.GetGitRefName())
if err != nil && !git.IsErrNotExist(err) {
ctx.ServerError("GetBranchCommitID", err)
return nil
}
if err == nil && headCommit != pullCommit {
// the head has moved on from the merge - we shouldn't delete
mergeMovedOn = true
}
}
}
isIncluded := divergence.Ahead == 0 && ctx.Repo.Repository.DefaultBranch != branchName
branches[i] = &Branch{
Name: branchName,
Commit: commit,
IsProtected: isProtected,
IsIncluded: isIncluded,
CommitsAhead: divergence.Ahead,
CommitsBehind: divergence.Behind,
LatestPullRequest: pr,
MergeMovedOn: mergeMovedOn,
}
}
if ctx.Repo.CanWrite(models.UnitTypeCode) {
deletedBranches, err := getDeletedBranches(ctx)
if err != nil {
ctx.ServerError("getDeletedBranches", err)
return nil
}
branches = append(branches, deletedBranches...)
}
return branches
}
func getDeletedBranches(ctx *context.Context) ([]*Branch, error) {
branches := []*Branch{}
deletedBranches, err := ctx.Repo.Repository.GetDeletedBranches()
if err != nil {
return branches, err
}
for i := range deletedBranches {
deletedBranches[i].LoadUser()
branches = append(branches, &Branch{
Name: deletedBranches[i].Name,
IsDeleted: true,
DeletedBranch: deletedBranches[i],
})
}
return branches, nil
}
// CreateBranch creates new branch in repository
func CreateBranch(ctx *context.Context, form auth.NewBranchForm) {
if !ctx.Repo.CanCreateBranch() {
ctx.NotFound("CreateBranch", nil)
return
}
if ctx.HasError() {
ctx.Flash.Error(ctx.GetErrMsg())
ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL())
return
}
var err error
if ctx.Repo.IsViewBranch {
err = repo_module.CreateNewBranch(ctx.User, ctx.Repo.Repository, ctx.Repo.BranchName, form.NewBranchName)
} else if ctx.Repo.IsViewTag {
err = repo_module.CreateNewBranchFromCommit(ctx.User, ctx.Repo.Repository, ctx.Repo.CommitID, form.NewBranchName)
} else {
err = repo_module.CreateNewBranchFromCommit(ctx.User, ctx.Repo.Repository, 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.BranchNameSubURL())
return
}
if models.IsErrBranchAlreadyExists(err) || git.IsErrPushOutOfDate(err) {
ctx.Flash.Error(ctx.Tr("repo.branch.branch_already_exists", form.NewBranchName))
ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL())
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.BranchNameSubURL())
return
}
if git.IsErrPushRejected(err) {
e := err.(*git.ErrPushRejected)
if len(e.Message) == 0 {
ctx.Flash.Error(ctx.Tr("repo.editor.push_rejected_no_message"))
} else {
ctx.Flash.Error(ctx.Tr("repo.editor.push_rejected", utils.SanitizeFlashErrorString(e.Message)))
}
ctx.Redirect(ctx.Repo.RepoLink + "/src/" + ctx.Repo.BranchNameSubURL())
return
}
ctx.ServerError("CreateNewBranch", err)
return
}
ctx.Flash.Success(ctx.Tr("repo.branch.create_success", form.NewBranchName))
ctx.Redirect(ctx.Repo.RepoLink + "/src/branch/" + util.PathEscapeSegments(form.NewBranchName))
}