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// 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 repofiles
import (
"fmt"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
repo_module "code.gitea.io/gitea/modules/repository"
api "code.gitea.io/gitea/modules/structs"
)
// DeleteRepoFileOptions holds the repository delete file options
type DeleteRepoFileOptions struct {
LastCommitID string
OldBranch string
NewBranch string
TreePath string
Message string
SHA string
Author *IdentityOptions
Committer *IdentityOptions
Dates *CommitDateOptions
}
// DeleteRepoFile deletes a file in the given repository
func DeleteRepoFile(repo *models.Repository, doer *models.User, opts *DeleteRepoFileOptions) (*api.FileResponse, error) {
// If no branch name is set, assume the repo's default branch
if opts.OldBranch == "" {
opts.OldBranch = repo.DefaultBranch
}
if opts.NewBranch == "" {
opts.NewBranch = opts.OldBranch
}
// oldBranch must exist for this operation
if _, err := repo_module.GetBranch(repo, opts.OldBranch); err != nil {
return nil, err
}
// A NewBranch can be specified for the file to be created/updated in a new branch.
// Check to make sure the branch does not already exist, otherwise we can't proceed.
// If we aren't branching to a new branch, make sure user can commit to the given branch
if opts.NewBranch != opts.OldBranch {
newBranch, err := repo_module.GetBranch(repo, opts.NewBranch)
if err != nil && !git.IsErrBranchNotExist(err) {
return nil, err
}
if newBranch != nil {
return nil, models.ErrBranchAlreadyExists{
BranchName: opts.NewBranch,
}
}
} else {
protectedBranch, err := repo.GetBranchProtection(opts.OldBranch)
if err != nil {
return nil, err
}
if protectedBranch != nil {
if !protectedBranch.CanUserPush(doer.ID) {
return nil, models.ErrUserCannotCommit{
UserName: doer.LowerName,
}
}
if protectedBranch.RequireSignedCommits {
_, _, err := repo.SignCRUDAction(doer, repo.RepoPath(), opts.OldBranch)
if err != nil {
if !models.IsErrWontSign(err) {
return nil, err
}
return nil, models.ErrUserCannotCommit{
UserName: doer.LowerName,
}
}
}
patterns := protectedBranch.GetProtectedFilePatterns()
for _, pat := range patterns {
if pat.Match(strings.ToLower(opts.TreePath)) {
return nil, models.ErrFilePathProtected{
Path: opts.TreePath,
}
}
}
}
}
// Check that the path given in opts.treeName is valid (not a git path)
treePath := CleanUploadFileName(opts.TreePath)
if treePath == "" {
return nil, models.ErrFilenameInvalid{
Path: opts.TreePath,
}
}
message := strings.TrimSpace(opts.Message)
author, committer := GetAuthorAndCommitterUsers(opts.Author, opts.Committer, doer)
t, err := NewTemporaryUploadRepository(repo)
if err != nil {
return nil, err
}
defer t.Close()
if err := t.Clone(opts.OldBranch); err != nil {
return nil, err
}
if err := t.SetDefaultIndex(); err != nil {
return nil, err
}
// Get the commit of the original branch
commit, err := t.GetBranchCommit(opts.OldBranch)
if err != nil {
return nil, err // Couldn't get a commit for the branch
}
// Assigned LastCommitID in opts if it hasn't been set
if opts.LastCommitID == "" {
opts.LastCommitID = commit.ID.String()
} else {
lastCommitID, err := t.gitRepo.ConvertToSHA1(opts.LastCommitID)
if err != nil {
return nil, fmt.Errorf("DeleteRepoFile: Invalid last commit ID: %v", err)
}
opts.LastCommitID = lastCommitID.String()
}
// Get the files in the index
filesInIndex, err := t.LsFiles(opts.TreePath)
if err != nil {
return nil, fmt.Errorf("DeleteRepoFile: %v", err)
}
// Find the file we want to delete in the index
inFilelist := false
for _, file := range filesInIndex {
if file == opts.TreePath {
inFilelist = true
break
}
}
if !inFilelist {
return nil, models.ErrRepoFileDoesNotExist{
Path: opts.TreePath,
}
}
// Get the entry of treePath and check if the SHA given is the same as the file
entry, err := commit.GetTreeEntryByPath(treePath)
if err != nil {
return nil, err
}
if opts.SHA != "" {
// If a SHA was given and the SHA given doesn't match the SHA of the fromTreePath, throw error
if opts.SHA != entry.ID.String() {
return nil, models.ErrSHADoesNotMatch{
Path: treePath,
GivenSHA: opts.SHA,
CurrentSHA: entry.ID.String(),
}
}
} else if opts.LastCommitID != "" {
// If a lastCommitID was given and it doesn't match the commitID of the head of the branch throw
// an error, but only if we aren't creating a new branch.
if commit.ID.String() != opts.LastCommitID && opts.OldBranch == opts.NewBranch {
// CommitIDs don't match, but we don't want to throw a ErrCommitIDDoesNotMatch unless
// this specific file has been edited since opts.LastCommitID
if changed, err := commit.FileChangedSinceCommit(treePath, opts.LastCommitID); err != nil {
return nil, err
} else if changed {
return nil, models.ErrCommitIDDoesNotMatch{
GivenCommitID: opts.LastCommitID,
CurrentCommitID: opts.LastCommitID,
}
}
// The file wasn't modified, so we are good to delete it
}
} else {
// When deleting a file, a lastCommitID or SHA needs to be given to make sure other commits haven't been
// made. We throw an error if one wasn't provided.
return nil, models.ErrSHAOrCommitIDNotProvided{}
}
// Remove the file from the index
if err := t.RemoveFilesFromIndex(opts.TreePath); err != nil {
return nil, err
}
// Now write the tree
treeHash, err := t.WriteTree()
if err != nil {
return nil, err
}
// Now commit the tree
var commitHash string
if opts.Dates != nil {
commitHash, err = t.CommitTreeWithDate(author, committer, treeHash, message, opts.Dates.Author, opts.Dates.Committer)
} else {
commitHash, err = t.CommitTree(author, committer, treeHash, message)
}
if err != nil {
return nil, err
}
// Then push this tree to NewBranch
if err := t.Push(doer, commitHash, opts.NewBranch); err != nil {
return nil, err
}
commit, err = t.GetCommit(commitHash)
if err != nil {
return nil, err
}
file, err := GetFileResponseFromCommit(repo, commit, opts.NewBranch, treePath)
if err != nil {
return nil, err
}
return file, nil
}
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