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gitea/services/repository/files/delete.go
zeripath e69b7a92ed
Allow API to create file on empty repo ()
This PR adds the necessary work to make it possible to create files on empty
repos using the API.

Fix 

Signed-off-by: Andrew Thornton <art27@cantab.net>
2022-03-28 21:48:41 +02:00

206 lines
5.9 KiB
Go

// 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 files
import (
"context"
"fmt"
"strings"
"code.gitea.io/gitea/models"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
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
Signoff bool
}
// DeleteRepoFile deletes a file in the given repository
func DeleteRepoFile(ctx context.Context, repo *repo_model.Repository, doer *user_model.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
}
gitRepo, closer, err := git.RepositoryFromContextOrOpen(ctx, repo.RepoPath())
if err != nil {
return nil, err
}
defer closer.Close()
// oldBranch must exist for this operation
if _, err := gitRepo.GetBranch(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 := gitRepo.GetBranch(opts.NewBranch)
if err != nil && !git.IsErrBranchNotExist(err) {
return nil, err
}
if newBranch != nil {
return nil, models.ErrBranchAlreadyExists{
BranchName: opts.NewBranch,
}
}
} else if err := VerifyBranchProtection(ctx, repo, doer, opts.OldBranch, opts.TreePath); err != nil {
return nil, err
}
// 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(ctx, 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("HEAD", author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
} else {
commitHash, err = t.CommitTree("HEAD", author, committer, treeHash, message, opts.Signoff)
}
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(ctx, repo, commit, opts.NewBranch, treePath)
if err != nil {
return nil, err
}
return file, nil
}