/
update.go
265 lines (235 loc) · 6.53 KB
/
update.go
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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 uploader
import (
"bytes"
"fmt"
"strings"
"golang.org/x/net/html/charset"
"golang.org/x/text/transform"
"code.gitea.io/git"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/lfs"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
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
}
// UpdateRepoFileOptions holds the repository file update options
type UpdateRepoFileOptions struct {
LastCommitID string
OldBranch string
NewBranch string
OldTreeName string
NewTreeName string
Message string
Content string
IsNewFile bool
}
// UpdateRepoFile adds or updates a file in the given repository
func UpdateRepoFile(repo *models.Repository, doer *models.User, opts *UpdateRepoFileOptions) error {
t, err := NewTemporaryUploadRepository(repo)
defer t.Close()
if err != nil {
return err
}
if err := t.Clone(opts.OldBranch); err != nil {
return err
}
if err := t.SetDefaultIndex(); err != nil {
return err
}
filesInIndex, err := t.LsFiles(opts.NewTreeName, opts.OldTreeName)
if err != nil {
return fmt.Errorf("UpdateRepoFile: %v", err)
}
encoding := "UTF-8"
bom := false
if opts.IsNewFile {
for _, file := range filesInIndex {
if file == opts.NewTreeName {
return models.ErrRepoFileAlreadyExist{FileName: opts.NewTreeName}
}
}
} else {
gitRepo, err := git.OpenRepository(t.basePath)
if err != nil {
return err
}
tree, err := gitRepo.GetTree("HEAD")
if err != nil {
return err
}
entry, err := tree.GetTreeEntryByPath(opts.OldTreeName)
if err != nil {
return err
}
encoding, bom = detectEncodingAndBOM(entry, repo)
}
//var stdout string
if opts.OldTreeName != opts.NewTreeName && len(filesInIndex) > 0 {
for _, file := range filesInIndex {
if file == opts.OldTreeName {
if err := t.RemoveFilesFromIndex(opts.OldTreeName); err != nil {
return err
}
}
}
}
// Check there is no way this can return multiple infos
filename2attribute2info, err := t.CheckAttribute("filter", opts.NewTreeName)
if err != nil {
return 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(4, "Error re-encoding %s (%s) as %s - will stay as UTF-8: %v", opts.NewTreeName, opts.OldTreeName, encoding, err)
result = content
}
content = result
} else {
log.Error(4, "Unknown encoding: %s", encoding)
}
}
// Reset the opts.Content with the re-encoded and BOM'd content
opts.Content = content
var lfsMetaObject *models.LFSMetaObject
if setting.LFS.StartServer && filename2attribute2info[opts.NewTreeName] != nil && filename2attribute2info[opts.NewTreeName]["filter"] == "lfs" {
// OK so we are supposed to LFS this data!
oid, err := models.GenerateLFSOid(strings.NewReader(opts.Content))
if err != nil {
return 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 err
}
// Add the object to the index
if err := t.AddObjectToIndex("100644", objectHash, opts.NewTreeName); err != nil {
return err
}
// Now write the tree
treeHash, err := t.WriteTree()
if err != nil {
return err
}
// Now commit the tree
commitHash, err := t.CommitTree(doer, treeHash, opts.Message)
if err != nil {
return err
}
if lfsMetaObject != nil {
// We have an LFS object - create it
lfsMetaObject, err = models.NewLFSMetaObject(lfsMetaObject)
if err != nil {
return 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 fmt.Errorf("Error whilst removing failed inserted LFS object %s: %v (Prev Error: %v)", lfsMetaObject.Oid, err2, err)
}
return err
}
}
}
// Then push this tree to NewBranch
if err := t.Push(doer, commitHash, opts.NewBranch); err != nil {
return err
}
// Simulate push event.
oldCommitID := opts.LastCommitID
if opts.NewBranch != opts.OldBranch {
oldCommitID = git.EmptySHA
}
if err = repo.GetOwner(); err != nil {
return 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 fmt.Errorf("PushUpdate: %v", err)
}
models.UpdateRepoIndexer(repo)
return nil
}