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migrate to use github.com/moby/sys/atomicwriter

Browse Source 
The github.com/docker/docker/pkg/atomicwriter package was moved
to a separate module.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2025-04-10 09:24:51 +02:00
parent f8de3c3bdc
commit b7b5a3a1cc
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GPG Key ID: 76698F39D527CE8C
7 changed files with 455 additions and 2 deletions
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2
commands/build.go
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@ -42,7 +42,6 @@ import (
"github.com/docker/cli/cli/command"
dockeropts "github.com/docker/cli/opts"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/exporter/containerimage/exptypes"
"github.com/moby/buildkit/frontend/subrequests"
@ -53,6 +52,7 @@ import (
solverpb "github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/grpcerrors"
"github.com/moby/buildkit/util/progress/progressui"
"github.com/moby/sys/atomicwriter"
"github.com/morikuni/aec"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"

1
go.mod
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@ -31,6 +31,7 @@ require (
github.com/mitchellh/hashstructure/v2 v2.0.2
github.com/moby/buildkit v0.21.0-rc1
github.com/moby/go-archive v0.0.0-20250404171912-21f3f3385ab7
github.com/moby/sys/atomicwriter v0.1.0
github.com/moby/sys/mountinfo v0.7.2
github.com/moby/sys/signal v0.7.1
github.com/morikuni/aec v1.0.0

2
go.sum
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@ -291,6 +291,8 @@ github.com/moby/patternmatcher v0.6.0 h1:GmP9lR19aU5GqSSFko+5pRqHi+Ohk1O69aFiKkV
github.com/moby/patternmatcher v0.6.0/go.mod h1:hDPoyOpDY7OrrMDLaYoY3hf52gNCR/YOUYxkhApJIxc=
github.com/moby/spdystream v0.4.0 h1:Vy79D6mHeJJjiPdFEL2yku1kl0chZpJfZcPpb16BRl8=
github.com/moby/spdystream v0.4.0/go.mod h1:xBAYlnt/ay+11ShkdFKNAG7LsyK/tmNBVvVOwrfMgdI=
github.com/moby/sys/atomicwriter v0.1.0 h1:kw5D/EqkBwsBFi0ss9v1VG3wIkVhzGvLklJ+w3A14Sw=
github.com/moby/sys/atomicwriter v0.1.0/go.mod h1:Ul8oqv2ZMNHOceF643P6FKPXeCmYtlQMvpizfsSoaWs=
github.com/moby/sys/mountinfo v0.7.2 h1:1shs6aH5s4o5H2zQLn796ADW1wMrIwHsyJ2v9KouLrg=
github.com/moby/sys/mountinfo v0.7.2/go.mod h1:1YOa8w8Ih7uW0wALDUgT1dTTSBrZ+HiBLGws92L2RU4=
github.com/moby/sys/sequential v0.6.0 h1:qrx7XFUd/5DxtqcoH1h438hF5TmOvzC/lspjy7zgvCU=

2
util/confutil/config.go
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@ -8,8 +8,8 @@ import (
"sync"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/buildkit/cmd/buildkitd/config"
"github.com/moby/sys/atomicwriter"
"github.com/pelletier/go-toml"
"github.com/pkg/errors"
fs "github.com/tonistiigi/fsutil/copy"

202
vendor/github.com/moby/sys/atomicwriter/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
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245
vendor/github.com/moby/sys/atomicwriter/atomicwriter.go generated vendored Normal file
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@ -0,0 +1,245 @@
// Package atomicwriter provides utilities to perform atomic writes to a
// file or set of files.
package atomicwriter
import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"syscall"
"github.com/moby/sys/sequential"
)
func validateDestination(fileName string) error {
if fileName == "" {
return errors.New("file name is empty")
}
if dir := filepath.Dir(fileName); dir != "" && dir != "." && dir != ".." {
di, err := os.Stat(dir)
if err != nil {
return fmt.Errorf("invalid output path: %w", err)
}
if !di.IsDir() {
return fmt.Errorf("invalid output path: %w", &os.PathError{Op: "stat", Path: dir, Err: syscall.ENOTDIR})
}
}
// Deliberately using Lstat here to match the behavior of [os.Rename],
// which is used when completing the write and does not resolve symlinks.
fi, err := os.Lstat(fileName)
if err != nil {
if os.IsNotExist(err) {
return nil
}
return fmt.Errorf("failed to stat output path: %w", err)
}
switch mode := fi.Mode(); {
case mode.IsRegular():
return nil // Regular file
case mode&os.ModeDir != 0:
return errors.New("cannot write to a directory")
case mode&os.ModeSymlink != 0:
return errors.New("cannot write to a symbolic link directly")
case mode&os.ModeNamedPipe != 0:
return errors.New("cannot write to a named pipe (FIFO)")
case mode&os.ModeSocket != 0:
return errors.New("cannot write to a socket")
case mode&os.ModeDevice != 0:
if mode&os.ModeCharDevice != 0 {
return errors.New("cannot write to a character device file")
}
return errors.New("cannot write to a block device file")
case mode&os.ModeSetuid != 0:
return errors.New("cannot write to a setuid file")
case mode&os.ModeSetgid != 0:
return errors.New("cannot write to a setgid file")
case mode&os.ModeSticky != 0:
return errors.New("cannot write to a sticky bit file")
default:
return fmt.Errorf("unknown file mode: %[1]s (%#[1]o)", mode)
}
}
// New returns a WriteCloser so that writing to it writes to a
// temporary file and closing it atomically changes the temporary file to
// destination path. Writing and closing concurrently is not allowed.
// NOTE: umask is not considered for the file's permissions.
//
// New uses [sequential.CreateTemp] to use sequential file access on Windows,
// avoiding depleting the standby list un-necessarily. On Linux, this equates to
// a regular [os.CreateTemp]. Refer to the [Win32 API documentation] for details
// on sequential file access.
//
// [Win32 API documentation]: https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilea#FILE_FLAG_SEQUENTIAL_SCAN
func New(filename string, perm os.FileMode) (io.WriteCloser, error) {
if err := validateDestination(filename); err != nil {
return nil, err
}
abspath, err := filepath.Abs(filename)
if err != nil {
return nil, err
}
f, err := sequential.CreateTemp(filepath.Dir(abspath), ".tmp-"+filepath.Base(filename))
if err != nil {
return nil, err
}
return &atomicFileWriter{
f: f,
fn: abspath,
perm: perm,
}, nil
}
// WriteFile atomically writes data to a file named by filename and with the
// specified permission bits. The given filename is created if it does not exist,
// but the destination directory must exist. It can be used as a drop-in replacement
// for [os.WriteFile], but currently does not allow the destination path to be
// a symlink. WriteFile is implemented using [New] for its implementation.
//
// NOTE: umask is not considered for the file's permissions.
func WriteFile(filename string, data []byte, perm os.FileMode) error {
f, err := New(filename, perm)
if err != nil {
return err
}
n, err := f.Write(data)
if err == nil && n < len(data) {
err = io.ErrShortWrite
f.(*atomicFileWriter).writeErr = err
}
if err1 := f.Close(); err == nil {
err = err1
}
return err
}
type atomicFileWriter struct {
f *os.File
fn string
writeErr error
written bool
perm os.FileMode
}
func (w *atomicFileWriter) Write(dt []byte) (int, error) {
w.written = true
n, err := w.f.Write(dt)
if err != nil {
w.writeErr = err
}
return n, err
}
func (w *atomicFileWriter) Close() (retErr error) {
defer func() {
if err := os.Remove(w.f.Name()); !errors.Is(err, os.ErrNotExist) && retErr == nil {
retErr = err
}
}()
if err := w.f.Sync(); err != nil {
_ = w.f.Close()
return err
}
if err := w.f.Close(); err != nil {
return err
}
if err := os.Chmod(w.f.Name(), w.perm); err != nil {
return err
}
if w.writeErr == nil && w.written {
return os.Rename(w.f.Name(), w.fn)
}
return nil
}
// WriteSet is used to atomically write a set
// of files and ensure they are visible at the same time.
// Must be committed to a new directory.
type WriteSet struct {
root string
}
// NewWriteSet creates a new atomic write set to
// atomically create a set of files. The given directory
// is used as the base directory for storing files before
// commit. If no temporary directory is given the system
// default is used.
func NewWriteSet(tmpDir string) (*WriteSet, error) {
td, err := os.MkdirTemp(tmpDir, "write-set-")
if err != nil {
return nil, err
}
return &WriteSet{
root: td,
}, nil
}
// WriteFile writes a file to the set, guaranteeing the file
// has been synced.
func (ws *WriteSet) WriteFile(filename string, data []byte, perm os.FileMode) error {
f, err := ws.FileWriter(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
if err != nil {
return err
}
n, err := f.Write(data)
if err == nil && n < len(data) {
err = io.ErrShortWrite
}
if err1 := f.Close(); err == nil {
err = err1
}
return err
}
type syncFileCloser struct {
*os.File
}
func (w syncFileCloser) Close() error {
err := w.File.Sync()
if err1 := w.File.Close(); err == nil {
err = err1
}
return err
}
// FileWriter opens a file writer inside the set. The file
// should be synced and closed before calling commit.
//
// FileWriter uses [sequential.OpenFile] to use sequential file access on Windows,
// avoiding depleting the standby list un-necessarily. On Linux, this equates to
// a regular [os.OpenFile]. Refer to the [Win32 API documentation] for details
// on sequential file access.
//
// [Win32 API documentation]: https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-createfilea#FILE_FLAG_SEQUENTIAL_SCAN
func (ws *WriteSet) FileWriter(name string, flag int, perm os.FileMode) (io.WriteCloser, error) {
f, err := sequential.OpenFile(filepath.Join(ws.root, name), flag, perm)
if err != nil {
return nil, err
}
return syncFileCloser{f}, nil
}
// Cancel cancels the set and removes all temporary data
// created in the set.
func (ws *WriteSet) Cancel() error {
return os.RemoveAll(ws.root)
}
// Commit moves all created files to the target directory. The
// target directory must not exist and the parent of the target
// directory must exist.
func (ws *WriteSet) Commit(target string) error {
return os.Rename(ws.root, target)
}
// String returns the location the set is writing to.
func (ws *WriteSet) String() string {
return ws.root
}

3
vendor/modules.txt vendored
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@ -580,6 +580,9 @@ github.com/moby/patternmatcher/ignorefile
## explicit; go 1.13
github.com/moby/spdystream
github.com/moby/spdystream/spdy
# github.com/moby/sys/atomicwriter v0.1.0
## explicit; go 1.18
github.com/moby/sys/atomicwriter
# github.com/moby/sys/mountinfo v0.7.2
## explicit; go 1.17
github.com/moby/sys/mountinfo