forgejo/modules/git/repo_index.go
zeripath 248b96d8a3
Use git attributes to determine generated and vendored status for language stats and diffs (#16773)
Replaces #16262
Replaces #16250
Replaces #14833

This PR first implements a `git check-attr` pipe reader - using `git check-attr --stdin -z --cached` - taking account of the change in the output format in git 1.8.5 and creates a helper function to read a tree into a temporary index file for that pipe reader.

It then wires this in to the language stats helper and into the git diff generation.

Files which are marked generated will be folded by default.

Fixes #14786
Fixes #12653
2021-09-09 21:13:36 +01:00

129 lines
3.5 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 git
import (
"bytes"
"context"
"io/ioutil"
"os"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
// ReadTreeToIndex reads a treeish to the index
func (repo *Repository) ReadTreeToIndex(treeish string, indexFilename ...string) error {
if len(treeish) != 40 {
res, err := NewCommand("rev-parse", "--verify", treeish).RunInDir(repo.Path)
if err != nil {
return err
}
if len(res) > 0 {
treeish = res[:len(res)-1]
}
}
id, err := NewIDFromString(treeish)
if err != nil {
return err
}
return repo.readTreeToIndex(id, indexFilename...)
}
func (repo *Repository) readTreeToIndex(id SHA1, indexFilename ...string) error {
var env []string
if len(indexFilename) > 0 {
env = append(os.Environ(), "GIT_INDEX_FILE="+indexFilename[0])
}
_, err := NewCommand("read-tree", id.String()).RunInDirWithEnv(repo.Path, env)
if err != nil {
return err
}
return nil
}
// ReadTreeToTemporaryIndex reads a treeish to a temporary index file
func (repo *Repository) ReadTreeToTemporaryIndex(treeish string) (filename string, cancel context.CancelFunc, err error) {
tmpIndex, err := ioutil.TempFile("", "index")
if err != nil {
return
}
filename = tmpIndex.Name()
cancel = func() {
err := util.Remove(filename)
if err != nil {
log.Error("failed to remove tmp index file: %v", err)
}
}
err = repo.ReadTreeToIndex(treeish, filename)
if err != nil {
defer cancel()
return "", func() {}, err
}
return
}
// EmptyIndex empties the index
func (repo *Repository) EmptyIndex() error {
_, err := NewCommand("read-tree", "--empty").RunInDir(repo.Path)
return err
}
// LsFiles checks if the given filenames are in the index
func (repo *Repository) LsFiles(filenames ...string) ([]string, error) {
cmd := NewCommand("ls-files", "-z", "--")
for _, arg := range filenames {
if arg != "" {
cmd.AddArguments(arg)
}
}
res, err := cmd.RunInDirBytes(repo.Path)
if err != nil {
return nil, err
}
filelist := make([]string, 0, len(filenames))
for _, line := range bytes.Split(res, []byte{'\000'}) {
filelist = append(filelist, string(line))
}
return filelist, err
}
// RemoveFilesFromIndex removes given filenames from the index - it does not check whether they are present.
func (repo *Repository) RemoveFilesFromIndex(filenames ...string) error {
cmd := NewCommand("update-index", "--remove", "-z", "--index-info")
stdout := new(bytes.Buffer)
stderr := new(bytes.Buffer)
buffer := new(bytes.Buffer)
for _, file := range filenames {
if file != "" {
buffer.WriteString("0 0000000000000000000000000000000000000000\t")
buffer.WriteString(file)
buffer.WriteByte('\000')
}
}
return cmd.RunInDirFullPipeline(repo.Path, stdout, stderr, bytes.NewReader(buffer.Bytes()))
}
// AddObjectToIndex adds the provided object hash to the index at the provided filename
func (repo *Repository) AddObjectToIndex(mode string, object SHA1, filename string) error {
cmd := NewCommand("update-index", "--add", "--replace", "--cacheinfo", mode, object.String(), filename)
_, err := cmd.RunInDir(repo.Path)
return err
}
// WriteTree writes the current index as a tree to the object db and returns its hash
func (repo *Repository) WriteTree() (*Tree, error) {
res, err := NewCommand("write-tree").RunInDir(repo.Path)
if err != nil {
return nil, err
}
id, err := NewIDFromString(strings.TrimSpace(res))
if err != nil {
return nil, err
}
return NewTree(repo, id), nil
}