mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-24 07:13:33 +01:00
a21128a734
See https://codeberg.org/forgejo/discussions/issues/164 for the rationale and discussion of this change. Everything related to the `go-git` dependency is dropped (Only a single instance is left in a test file to test for an XSS, it requires crafting an commit that Git itself refuses to craft). `_gogit` files have been removed entirely, `go:build: !gogit` is removed, `XXX_nogogit.go` files either have been renamed or had their code being merged into the `XXX.go` file.
109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package lfs
|
|
|
|
import (
|
|
"bufio"
|
|
"context"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
|
|
"code.gitea.io/gitea/modules/git"
|
|
"code.gitea.io/gitea/modules/git/pipeline"
|
|
)
|
|
|
|
// SearchPointerBlobs scans the whole repository for LFS pointer files
|
|
func SearchPointerBlobs(ctx context.Context, repo *git.Repository, pointerChan chan<- PointerBlob, errChan chan<- error) {
|
|
basePath := repo.Path
|
|
|
|
catFileCheckReader, catFileCheckWriter := io.Pipe()
|
|
shasToBatchReader, shasToBatchWriter := io.Pipe()
|
|
catFileBatchReader, catFileBatchWriter := io.Pipe()
|
|
|
|
wg := sync.WaitGroup{}
|
|
wg.Add(4)
|
|
|
|
// Create the go-routines in reverse order.
|
|
|
|
// 4. Take the output of cat-file --batch and check if each file in turn
|
|
// to see if they're pointers to files in the LFS store
|
|
go createPointerResultsFromCatFileBatch(ctx, catFileBatchReader, &wg, pointerChan)
|
|
|
|
// 3. Take the shas of the blobs and batch read them
|
|
go pipeline.CatFileBatch(ctx, shasToBatchReader, catFileBatchWriter, &wg, basePath)
|
|
|
|
// 2. From the provided objects restrict to blobs <=1k
|
|
go pipeline.BlobsLessThan1024FromCatFileBatchCheck(catFileCheckReader, shasToBatchWriter, &wg)
|
|
|
|
// 1. Run batch-check on all objects in the repository
|
|
if git.CheckGitVersionAtLeast("2.6.0") != nil {
|
|
revListReader, revListWriter := io.Pipe()
|
|
shasToCheckReader, shasToCheckWriter := io.Pipe()
|
|
wg.Add(2)
|
|
go pipeline.CatFileBatchCheck(ctx, shasToCheckReader, catFileCheckWriter, &wg, basePath)
|
|
go pipeline.BlobsFromRevListObjects(revListReader, shasToCheckWriter, &wg)
|
|
go pipeline.RevListAllObjects(ctx, revListWriter, &wg, basePath, errChan)
|
|
} else {
|
|
go pipeline.CatFileBatchCheckAllObjects(ctx, catFileCheckWriter, &wg, basePath, errChan)
|
|
}
|
|
wg.Wait()
|
|
|
|
close(pointerChan)
|
|
close(errChan)
|
|
}
|
|
|
|
func createPointerResultsFromCatFileBatch(ctx context.Context, catFileBatchReader *io.PipeReader, wg *sync.WaitGroup, pointerChan chan<- PointerBlob) {
|
|
defer wg.Done()
|
|
defer catFileBatchReader.Close()
|
|
|
|
bufferedReader := bufio.NewReader(catFileBatchReader)
|
|
buf := make([]byte, 1025)
|
|
|
|
loop:
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
break loop
|
|
default:
|
|
}
|
|
|
|
// File descriptor line: sha
|
|
sha, err := bufferedReader.ReadString(' ')
|
|
if err != nil {
|
|
_ = catFileBatchReader.CloseWithError(err)
|
|
break
|
|
}
|
|
sha = strings.TrimSpace(sha)
|
|
// Throw away the blob
|
|
if _, err := bufferedReader.ReadString(' '); err != nil {
|
|
_ = catFileBatchReader.CloseWithError(err)
|
|
break
|
|
}
|
|
sizeStr, err := bufferedReader.ReadString('\n')
|
|
if err != nil {
|
|
_ = catFileBatchReader.CloseWithError(err)
|
|
break
|
|
}
|
|
size, err := strconv.Atoi(sizeStr[:len(sizeStr)-1])
|
|
if err != nil {
|
|
_ = catFileBatchReader.CloseWithError(err)
|
|
break
|
|
}
|
|
pointerBuf := buf[:size+1]
|
|
if _, err := io.ReadFull(bufferedReader, pointerBuf); err != nil {
|
|
_ = catFileBatchReader.CloseWithError(err)
|
|
break
|
|
}
|
|
pointerBuf = pointerBuf[:size]
|
|
// Now we need to check if the pointerBuf is an LFS pointer
|
|
pointer, _ := ReadPointerFromBuffer(pointerBuf)
|
|
if !pointer.IsValid() {
|
|
continue
|
|
}
|
|
|
|
pointerChan <- PointerBlob{Hash: sha, Pointer: pointer}
|
|
}
|
|
}
|