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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 pipeline
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"strings"
"sync"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// RevListAllObjects runs rev-list --objects --all and writes to a pipewriter
func RevListAllObjects(ctx context.Context, revListWriter *io.PipeWriter, wg *sync.WaitGroup, basePath string, errChan chan<- error) {
defer wg.Done()
defer revListWriter.Close()
stderr := new(bytes.Buffer)
var errbuf strings.Builder
cmd := git.NewCommand(ctx, "rev-list", "--objects", "--all")
if err := cmd.Run(&git.RunOpts{
Dir: basePath,
Stdout: revListWriter,
Stderr: stderr,
}); err != nil {
log.Error("git rev-list --objects --all [%s]: %v - %s", basePath, err, errbuf.String())
err = fmt.Errorf("git rev-list --objects --all [%s]: %w - %s", basePath, err, errbuf.String())
_ = revListWriter.CloseWithError(err)
errChan <- err
}
}
// RevListObjects run rev-list --objects from headSHA to baseSHA
func RevListObjects(ctx context.Context, revListWriter *io.PipeWriter, wg *sync.WaitGroup, tmpBasePath, headSHA, baseSHA string, errChan chan<- error) {
defer wg.Done()
defer revListWriter.Close()
stderr := new(bytes.Buffer)
var errbuf strings.Builder
cmd := git.NewCommand(ctx, "rev-list", "--objects").AddDynamicArguments(headSHA).AddArguments("--not").AddDynamicArguments(baseSHA)
if err := cmd.Run(&git.RunOpts{
Dir: tmpBasePath,
Stdout: revListWriter,
Stderr: stderr,
}); err != nil {
log.Error("git rev-list [%s]: %v - %s", tmpBasePath, err, errbuf.String())
errChan <- fmt.Errorf("git rev-list [%s]: %w - %s", tmpBasePath, err, errbuf.String())
}
}
// BlobsFromRevListObjects reads a RevListAllObjects and only selects blobs
func BlobsFromRevListObjects(revListReader *io.PipeReader, shasToCheckWriter *io.PipeWriter, wg *sync.WaitGroup) {
defer wg.Done()
defer revListReader.Close()
scanner := bufio.NewScanner(revListReader)
defer func() {
_ = shasToCheckWriter.CloseWithError(scanner.Err())
}()
for scanner.Scan() {
line := scanner.Text()
if len(line) == 0 {
continue
}
fields := strings.Split(line, " ")
if len(fields) < 2 || len(fields[1]) == 0 {
continue
}
toWrite := []byte(fields[0] + "\n")
for len(toWrite) > 0 {
n, err := shasToCheckWriter.Write(toWrite)
if err != nil {
_ = revListReader.CloseWithError(err)
break
}
toWrite = toWrite[n:]
}
}
}
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