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Make cancel from CatFileBatch and CatFileBatchCheck wait for the command to end (#16479) (#16481)

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* Make cancel from CatFileBatch and CatFileBatchCheck wait for the command to end

Fix #16427 (again!)

* handle sharing violation error code

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-07-21 17:34:53 +01:00 committed by GitHub
parent e6c222511d
commit 3299f044d3
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 30 additions and 3 deletions
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12
modules/git/batch_reader.go
View file

@ -7,6 +7,7 @@ package git
import (
"bufio"
"bytes"
"context"
"io"
"math"
"strconv"
@ -15,20 +16,24 @@ import (
// CatFileBatch opens git cat-file --batch in the provided repo and returns a stdin pipe, a stdout reader and cancel function
func CatFileBatch(repoPath string) (*io.PipeWriter, *bufio.Reader, func()) {
// Next feed the commits in order into cat-file --batch, followed by their trees and sub trees as necessary.
// We often want to feed the commits in order into cat-file --batch, followed by their trees and sub trees as necessary.
// so let's create a batch stdin and stdout
batchStdinReader, batchStdinWriter := io.Pipe()
batchStdoutReader, batchStdoutWriter := io.Pipe()
ctx, ctxCancel := context.WithCancel(DefaultContext)
closed := make(chan struct{})
cancel := func() {
_ = batchStdinReader.Close()
_ = batchStdinWriter.Close()
_ = batchStdoutReader.Close()
_ = batchStdoutWriter.Close()
ctxCancel()
<-closed
}
go func() {
stderr := strings.Builder{}
err := NewCommand("cat-file", "--batch").RunInDirFullPipeline(repoPath, batchStdoutWriter, &stderr, batchStdinReader)
err := NewCommandContext(ctx, "cat-file", "--batch").RunInDirFullPipeline(repoPath, batchStdoutWriter, &stderr, batchStdinReader)
if err != nil {
_ = batchStdoutWriter.CloseWithError(ConcatenateError(err, (&stderr).String()))
_ = batchStdinReader.CloseWithError(ConcatenateError(err, (&stderr).String()))
@ -36,10 +41,11 @@ func CatFileBatch(repoPath string) (*io.PipeWriter, *bufio.Reader, func()) {
_ = batchStdoutWriter.Close()
_ = batchStdinReader.Close()
}
close(closed)
}()
// For simplicities sake we'll us a buffered reader to read from the cat-file --batch
batchReader := bufio.NewReader(batchStdoutReader)
batchReader := bufio.NewReaderSize(batchStdoutReader, 32*1024)
return batchStdinWriter, batchReader, cancel
}

21
modules/util/remove.go
View file

@ -6,10 +6,13 @@ package util
import (
"os"
"runtime"
"syscall"
"time"
)
const windowsSharingViolationError syscall.Errno = 32
// Remove removes the named file or (empty) directory with at most 5 attempts.
func Remove(name string) error {
var err error
@ -25,6 +28,12 @@ func Remove(name string) error {
continue
}
if unwrapped == windowsSharingViolationError && runtime.GOOS == "windows" {
// try again
<-time.After(100 * time.Millisecond)
continue
}
if unwrapped == syscall.ENOENT {
// it's already gone
return nil
@ -48,6 +57,12 @@ func RemoveAll(name string) error {
continue
}
if unwrapped == windowsSharingViolationError && runtime.GOOS == "windows" {
// try again
<-time.After(100 * time.Millisecond)
continue
}
if unwrapped == syscall.ENOENT {
// it's already gone
return nil
@ -71,6 +86,12 @@ func Rename(oldpath, newpath string) error {
continue
}
if unwrapped == windowsSharingViolationError && runtime.GOOS == "windows" {
// try again
<-time.After(100 * time.Millisecond)
continue
}
if i == 0 && os.IsNotExist(err) {
return err
}