forgejo-federation/modules/repofiles/update.go
Lunny Xiao 34eee25bd4
Move sdk structs to modules/structs (#6905)
* move sdk structs to moduels/structs

* fix tests

* fix fmt

* fix swagger

* fix vendor
2019-05-11 18:21:34 +08:00

424 lines
12 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// 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 (
"bytes"
"fmt"
"path"
"strings"
"golang.org/x/net/html/charset"
"golang.org/x/text/transform"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/lfs"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/structs"
)
// IdentityOptions for a person's identity like an author or committer
type IdentityOptions struct {
Name string
Email string
}
// UpdateRepoFileOptions holds the repository file update options
type UpdateRepoFileOptions struct {
LastCommitID string
OldBranch string
NewBranch string
TreePath string
FromTreePath string
Message string
Content string
SHA string
IsNewFile bool
Author *IdentityOptions
Committer *IdentityOptions
}
func detectEncodingAndBOM(entry *git.TreeEntry, repo *models.Repository) (string, bool) {
reader, err := entry.Blob().DataAsync()
if err != nil {
// return default
return "UTF-8", false
}
defer reader.Close()
buf := make([]byte, 1024)
n, err := reader.Read(buf)
if err != nil {
// return default
return "UTF-8", false
}
buf = buf[:n]
if setting.LFS.StartServer {
meta := lfs.IsPointerFile(&buf)
if meta != nil {
meta, err = repo.GetLFSMetaObjectByOid(meta.Oid)
if err != nil && err != models.ErrLFSObjectNotExist {
// return default
return "UTF-8", false
}
}
if meta != nil {
dataRc, err := lfs.ReadMetaObject(meta)
if err != nil {
// return default
return "UTF-8", false
}
defer dataRc.Close()
buf = make([]byte, 1024)
n, err = dataRc.Read(buf)
if err != nil {
// return default
return "UTF-8", false
}
buf = buf[:n]
}
}
encoding, err := base.DetectEncoding(buf)
if err != nil {
// just default to utf-8 and no bom
return "UTF-8", false
}
if encoding == "UTF-8" {
return encoding, bytes.Equal(buf[0:3], base.UTF8BOM)
}
charsetEncoding, _ := charset.Lookup(encoding)
if charsetEncoding == nil {
return "UTF-8", false
}
result, n, err := transform.String(charsetEncoding.NewDecoder(), string(buf))
if n > 2 {
return encoding, bytes.Equal([]byte(result)[0:3], base.UTF8BOM)
}
return encoding, false
}
// CreateOrUpdateRepoFile adds or updates a file in the given repository
func CreateOrUpdateRepoFile(repo *models.Repository, doer *models.User, opts *UpdateRepoFileOptions) (*structs.FileResponse, error) {
// If no branch name is set, assume master
if opts.OldBranch == "" {
opts.OldBranch = repo.DefaultBranch
}
if opts.NewBranch == "" {
opts.NewBranch = opts.OldBranch
}
// oldBranch must exist for this operation
if _, err := repo.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 {
existingBranch, err := repo.GetBranch(opts.NewBranch)
if existingBranch != nil {
return nil, models.ErrBranchAlreadyExists{
BranchName: opts.NewBranch,
}
}
if err != nil && !git.IsErrBranchNotExist(err) {
return nil, err
}
} else {
if protected, _ := repo.IsProtectedBranchForPush(opts.OldBranch, doer); protected {
return nil, models.ErrUserCannotCommit{UserName: doer.LowerName}
}
}
// If FromTreePath is not set, set it to the opts.TreePath
if opts.TreePath != "" && opts.FromTreePath == "" {
opts.FromTreePath = opts.TreePath
}
// Check that the path given in opts.treePath is valid (not a git path)
treePath := CleanUploadFileName(opts.TreePath)
if treePath == "" {
return nil, models.ErrFilenameInvalid{
Path: opts.TreePath,
}
}
// If there is a fromTreePath (we are copying it), also clean it up
fromTreePath := CleanUploadFileName(opts.FromTreePath)
if fromTreePath == "" && opts.FromTreePath != "" {
return nil, models.ErrFilenameInvalid{
Path: opts.FromTreePath,
}
}
message := strings.TrimSpace(opts.Message)
author, committer := GetAuthorAndCommitterUsers(opts.Committer, opts.Author, doer)
t, err := NewTemporaryUploadRepository(repo)
defer t.Close()
if err != nil {
return nil, err
}
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()
}
encoding := "UTF-8"
bom := false
if !opts.IsNewFile {
fromEntry, err := commit.GetTreeEntryByPath(fromTreePath)
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 != fromEntry.ID.String() {
return nil, models.ErrSHADoesNotMatch{
Path: treePath,
GivenSHA: opts.SHA,
CurrentSHA: fromEntry.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 {
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 updating 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{}
}
encoding, bom = detectEncodingAndBOM(fromEntry, repo)
}
// For the path where this file will be created/updated, we need to make
// sure no parts of the path are existing files or links except for the last
// item in the path which is the file name, and that shouldn't exist IF it is
// a new file OR is being moved to a new path.
treePathParts := strings.Split(treePath, "/")
subTreePath := ""
for index, part := range treePathParts {
subTreePath = path.Join(subTreePath, part)
entry, err := commit.GetTreeEntryByPath(subTreePath)
if err != nil {
if git.IsErrNotExist(err) {
// Means there is no item with that name, so we're good
break
}
return nil, err
}
if index < len(treePathParts)-1 {
if !entry.IsDir() {
return nil, models.ErrFilePathInvalid{
Message: fmt.Sprintf("a file exists where youre trying to create a subdirectory [path: %s]", subTreePath),
Path: subTreePath,
Name: part,
Type: git.EntryModeBlob,
}
}
} else if entry.IsLink() {
return nil, models.ErrFilePathInvalid{
Message: fmt.Sprintf("a symbolic link exists where youre trying to create a subdirectory [path: %s]", subTreePath),
Path: subTreePath,
Name: part,
Type: git.EntryModeSymlink,
}
} else if entry.IsDir() {
return nil, models.ErrFilePathInvalid{
Message: fmt.Sprintf("a directory exists where youre trying to create a file [path: %s]", subTreePath),
Path: subTreePath,
Name: part,
Type: git.EntryModeTree,
}
} else if fromTreePath != treePath || opts.IsNewFile {
// The entry shouldn't exist if we are creating new file or moving to a new path
return nil, models.ErrRepoFileAlreadyExists{
Path: treePath,
}
}
}
// Get the two paths (might be the same if not moving) from the index if they exist
filesInIndex, err := t.LsFiles(opts.TreePath, opts.FromTreePath)
if err != nil {
return nil, fmt.Errorf("UpdateRepoFile: %v", err)
}
// If is a new file (not updating) then the given path shouldn't exist
if opts.IsNewFile {
for _, file := range filesInIndex {
if file == opts.TreePath {
return nil, models.ErrRepoFileAlreadyExists{
Path: opts.TreePath,
}
}
}
}
// Remove the old path from the tree
if fromTreePath != treePath && len(filesInIndex) > 0 {
for _, file := range filesInIndex {
if file == fromTreePath {
if err := t.RemoveFilesFromIndex(opts.FromTreePath); err != nil {
return nil, err
}
}
}
}
// Check there is no way this can return multiple infos
filename2attribute2info, err := t.CheckAttribute("filter", treePath)
if err != nil {
return nil, err
}
content := opts.Content
if bom {
content = string(base.UTF8BOM) + content
}
if encoding != "UTF-8" {
charsetEncoding, _ := charset.Lookup(encoding)
if charsetEncoding != nil {
result, _, err := transform.String(charsetEncoding.NewEncoder(), string(content))
if err != nil {
// Look if we can't encode back in to the original we should just stick with utf-8
log.Error("Error re-encoding %s (%s) as %s - will stay as UTF-8: %v", opts.TreePath, opts.FromTreePath, encoding, err)
result = content
}
content = result
} else {
log.Error("Unknown encoding: %s", encoding)
}
}
// Reset the opts.Content to our adjusted content to ensure that LFS gets the correct content
opts.Content = content
var lfsMetaObject *models.LFSMetaObject
if setting.LFS.StartServer && filename2attribute2info[treePath] != nil && filename2attribute2info[treePath]["filter"] == "lfs" {
// OK so we are supposed to LFS this data!
oid, err := models.GenerateLFSOid(strings.NewReader(opts.Content))
if err != nil {
return nil, err
}
lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(opts.Content)), RepositoryID: repo.ID}
content = lfsMetaObject.Pointer()
}
// Add the object to the database
objectHash, err := t.HashObject(strings.NewReader(content))
if err != nil {
return nil, err
}
// Add the object to the index
if err := t.AddObjectToIndex("100644", objectHash, treePath); err != nil {
return nil, err
}
// Now write the tree
treeHash, err := t.WriteTree()
if err != nil {
return nil, err
}
// Now commit the tree
commitHash, err := t.CommitTree(author, committer, treeHash, message)
if err != nil {
return nil, err
}
if lfsMetaObject != nil {
// We have an LFS object - create it
lfsMetaObject, err = models.NewLFSMetaObject(lfsMetaObject)
if err != nil {
return nil, err
}
contentStore := &lfs.ContentStore{BasePath: setting.LFS.ContentPath}
if !contentStore.Exists(lfsMetaObject) {
if err := contentStore.Put(lfsMetaObject, strings.NewReader(opts.Content)); err != nil {
if err2 := repo.RemoveLFSMetaObjectByOid(lfsMetaObject.Oid); err2 != nil {
return nil, fmt.Errorf("Error whilst removing failed inserted LFS object %s: %v (Prev Error: %v)", lfsMetaObject.Oid, err2, err)
}
return nil, err
}
}
}
// Then push this tree to NewBranch
if err := t.Push(doer, commitHash, opts.NewBranch); err != nil {
return nil, err
}
// Simulate push event.
oldCommitID := opts.LastCommitID
if opts.NewBranch != opts.OldBranch || oldCommitID == "" {
oldCommitID = git.EmptySHA
}
if err = repo.GetOwner(); err != nil {
return nil, fmt.Errorf("GetOwner: %v", err)
}
err = models.PushUpdate(
opts.NewBranch,
models.PushUpdateOptions{
PusherID: doer.ID,
PusherName: doer.Name,
RepoUserName: repo.Owner.Name,
RepoName: repo.Name,
RefFullName: git.BranchPrefix + opts.NewBranch,
OldCommitID: oldCommitID,
NewCommitID: commitHash,
},
)
if err != nil {
return nil, fmt.Errorf("PushUpdate: %v", err)
}
models.UpdateRepoIndexer(repo)
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
}