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deprecate pkg/atomicwriter, migrate to github.com/moby/sys/atomicwriter

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Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2025-04-04 20:58:00 +02:00
parent d7b743b856
commit 6422ff2804
No known key found for this signature in database
GPG Key ID: 76698F39D527CE8C
20 changed files with 277 additions and 338 deletions
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2
container/container.go
View File

@ -30,13 +30,13 @@ import (
"github.com/docker/docker/image"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/oci"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/restartmanager"
"github.com/docker/docker/volume"
volumemounts "github.com/docker/docker/volume/mounts"
"github.com/docker/go-units"
agentexec "github.com/moby/swarmkit/v2/agent/exec"
"github.com/moby/sys/atomicwriter"
"github.com/moby/sys/signal"
"github.com/moby/sys/symlink"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"

2
daemon/cluster/utils.go
View File

@ -6,7 +6,7 @@ import (
"path/filepath"
"strings"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
)
// convertKVStringsToMap converts ["key=value"] to {"key":"value"}

2
daemon/graphdriver/overlay2/overlay.go
View File

@ -23,12 +23,12 @@ import (
"github.com/docker/docker/internal/containerfs"
"github.com/docker/docker/internal/directory"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/docker/docker/pkg/chrootarchive"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/quota"
"github.com/docker/go-units"
"github.com/moby/locker"
"github.com/moby/sys/atomicwriter"
"github.com/moby/sys/mount"
"github.com/moby/sys/userns"
"github.com/opencontainers/selinux/go-selinux/label"

2
daemon/id.go
View File

@ -4,8 +4,8 @@ import (
"os"
"path/filepath"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/google/uuid"
"github.com/moby/sys/atomicwriter"
"github.com/pkg/errors"
)

2
daemon/runtime_unix.go
View File

@ -21,7 +21,7 @@ import (
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/libcontainerd/shimopts"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/runtime-spec/specs-go/features"
"github.com/pkg/errors"
)

2
distribution/metadata/metadata.go
View File

@ -5,7 +5,7 @@ import (
"path/filepath"
"sync"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
)
// Store implements a K/V store for mapping distribution-related IDs

2
image/fs.go
View File

@ -8,7 +8,7 @@ import (
"sync"
"github.com/containerd/log"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)

2
layer/filestore.go
View File

@ -12,8 +12,8 @@ import (
"github.com/containerd/log"
"github.com/docker/distribution"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/docker/docker/pkg/ioutils"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)

2
libnetwork/internal/resolvconf/resolvconf.go
View File

@ -31,7 +31,7 @@ import (
"text/template"
"github.com/containerd/log"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)

56
pkg/atomicwriter/atomicwriter_deprecated.go Normal file
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@ -0,0 +1,56 @@
package atomicwriter
import (
"io"
"os"
"github.com/moby/sys/atomicwriter"
)
// 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.
//
// Deprecated: use [atomicwriter.New] instead.
//
// [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) {
return atomicwriter.New(filename, perm)
}
// 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.
//
// Deprecated: use [atomicwriter.WriteFile] instead.
func WriteFile(filename string, data []byte, perm os.FileMode) error {
return atomicwriter.WriteFile(filename, data, perm)
}
// 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.
//
// Deprecated: use [atomicwriter.WriteSet] instead.
type WriteSet = atomicwriter.WriteSet
// 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.
//
// Deprecated: use [atomicwriter.NewWriteSet] instead.
func NewWriteSet(tmpDir string) (*atomicwriter.WriteSet, error) {
return atomicwriter.NewWriteSet(tmpDir)
}

325
pkg/atomicwriter/atomicwriter_test.go
View File

@ -1,325 +0,0 @@
package atomicwriter
import (
"bytes"
"errors"
"os"
"path/filepath"
"runtime"
"strings"
"syscall"
"testing"
)
// testMode returns the file-mode to use in tests, accounting for Windows
// not supporting full Linux file mode.
func testMode() os.FileMode {
if runtime.GOOS == "windows" {
return 0o666
}
return 0o640
}
// assertFile asserts the given fileName to exist, and to have the expected
// content and mode.
func assertFile(t *testing.T, fileName string, fileContent []byte, expectedMode os.FileMode) {
t.Helper()
actual, err := os.ReadFile(fileName)
if err != nil {
t.Fatalf("Error reading from file: %v", err)
}
if !bytes.Equal(actual, fileContent) {
t.Errorf("Data mismatch, expected %q, got %q", fileContent, actual)
}
st, err := os.Stat(fileName)
if err != nil {
t.Fatalf("Error statting file: %v", err)
}
if st.Mode() != expectedMode {
t.Errorf("Mode mismatched, expected %o, got %o", expectedMode, st.Mode())
}
}
// assertFileCount asserts the given directory has the expected number
// of files, and returns the list of files found.
func assertFileCount(t *testing.T, directory string, expected int) []os.DirEntry {
t.Helper()
files, err := os.ReadDir(directory)
if err != nil {
t.Fatalf("Error reading dir: %v", err)
}
if len(files) != expected {
t.Errorf("Expected %d files, got %d: %v", expected, len(files), files)
}
return files
}
func TestNew(t *testing.T) {
for _, tc := range []string{"normal", "symlinked"} {
tmpDir := t.TempDir()
parentDir := tmpDir
actualParentDir := parentDir
if tc == "symlinked" {
actualParentDir = filepath.Join(tmpDir, "parent-dir")
if err := os.Mkdir(actualParentDir, 0o700); err != nil {
t.Fatal(err)
}
parentDir = filepath.Join(tmpDir, "parent-dir-symlink")
if err := os.Symlink(actualParentDir, parentDir); err != nil {
t.Fatal(err)
}
}
t.Run(tc, func(t *testing.T) {
for _, tc := range []string{"new-file", "existing-file"} {
t.Run(tc, func(t *testing.T) {
fileName := filepath.Join(parentDir, "test.txt")
var origFileCount int
if tc == "existing-file" {
if err := os.WriteFile(fileName, []byte("original content"), testMode()); err != nil {
t.Fatalf("Error writing file: %v", err)
}
origFileCount = 1
}
writer, err := New(fileName, testMode())
if writer == nil {
t.Errorf("Writer is nil")
}
if err != nil {
t.Fatalf("Error creating new atomicwriter: %v", err)
}
files := assertFileCount(t, actualParentDir, origFileCount+1)
if tmpFileName := files[0].Name(); !strings.HasPrefix(tmpFileName, ".tmp-test.txt") {
t.Errorf("Unexpected file name for temp-file: %s", tmpFileName)
}
// Closing the writer without writing should clean up the temp-file,
// and should not replace the destination file.
if err = writer.Close(); err != nil {
t.Errorf("Error closing writer: %v", err)
}
assertFileCount(t, actualParentDir, origFileCount)
if tc == "existing-file" {
assertFile(t, fileName, []byte("original content"), testMode())
}
})
}
})
}
}
func TestNewInvalid(t *testing.T) {
t.Run("missing target dir", func(t *testing.T) {
tmpDir := t.TempDir()
fileName := filepath.Join(tmpDir, "missing-dir", "test.txt")
writer, err := New(fileName, testMode())
if writer != nil {
t.Errorf("Should not have created writer")
}
if !errors.Is(err, os.ErrNotExist) {
t.Errorf("Should produce a 'not found' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("target dir is not a directory", func(t *testing.T) {
tmpDir := t.TempDir()
parentPath := filepath.Join(tmpDir, "not-a-dir")
err := os.WriteFile(parentPath, nil, testMode())
if err != nil {
t.Fatalf("Error writing file: %v", err)
}
fileName := filepath.Join(parentPath, "new-file.txt")
writer, err := New(fileName, testMode())
if writer != nil {
t.Errorf("Should not have created writer")
}
// This should match the behavior of os.WriteFile, which returns a [os.PathError] with [syscall.ENOTDIR].
if !errors.Is(err, syscall.ENOTDIR) {
t.Errorf("Should produce a 'not a directory' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("empty filename", func(t *testing.T) {
writer, err := New("", testMode())
if writer != nil {
t.Errorf("Should not have created writer")
}
if err == nil || err.Error() != "file name is empty" {
t.Errorf("Should produce a 'file name is empty' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("directory", func(t *testing.T) {
tmpDir := t.TempDir()
writer, err := New(tmpDir, testMode())
if writer != nil {
t.Errorf("Should not have created writer")
}
if err == nil || err.Error() != "cannot write to a directory" {
t.Errorf("Should produce a 'cannot write to a directory' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("symlinked file", func(t *testing.T) {
tmpDir := t.TempDir()
linkTarget := filepath.Join(tmpDir, "symlink-target")
if err := os.WriteFile(linkTarget, []byte("orig content"), testMode()); err != nil {
t.Fatal(err)
}
fileName := filepath.Join(tmpDir, "symlinked-file")
if err := os.Symlink(linkTarget, fileName); err != nil {
t.Fatal(err)
}
writer, err := New(fileName, testMode())
if writer != nil {
t.Errorf("Should not have created writer")
}
if err == nil || err.Error() != "cannot write to a symbolic link directly" {
t.Errorf("Should produce a 'cannot write to a symbolic link directly' error, but got %[1]T (%[1]v)", err)
}
})
}
func TestWriteFile(t *testing.T) {
t.Run("empty filename", func(t *testing.T) {
err := WriteFile("", nil, testMode())
if err == nil || err.Error() != "file name is empty" {
t.Errorf("Should produce a 'file name is empty' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("write to directory", func(t *testing.T) {
err := WriteFile(t.TempDir(), nil, testMode())
if err == nil || err.Error() != "cannot write to a directory" {
t.Errorf("Should produce a 'cannot write to a directory' error, but got %[1]T (%[1]v)", err)
}
})
t.Run("write to file", func(t *testing.T) {
tmpDir := t.TempDir()
fileName := filepath.Join(tmpDir, "test.txt")
fileContent := []byte("file content")
fileMode := testMode()
if err := WriteFile(fileName, fileContent, fileMode); err != nil {
t.Fatalf("Error writing to file: %v", err)
}
assertFile(t, fileName, fileContent, fileMode)
assertFileCount(t, tmpDir, 1)
})
t.Run("missing parent directory", func(t *testing.T) {
tmpDir := t.TempDir()
fileName := filepath.Join(tmpDir, "missing-dir", "test.txt")
fileContent := []byte("file content")
fileMode := testMode()
if err := WriteFile(fileName, fileContent, fileMode); !errors.Is(err, os.ErrNotExist) {
t.Errorf("Should produce a 'not found' error, but got %[1]T (%[1]v)", err)
}
assertFileCount(t, tmpDir, 0)
})
t.Run("symlinked file", func(t *testing.T) {
tmpDir := t.TempDir()
linkTarget := filepath.Join(tmpDir, "symlink-target")
originalContent := []byte("original content")
fileMode := testMode()
if err := os.WriteFile(linkTarget, originalContent, fileMode); err != nil {
t.Fatal(err)
}
if err := os.Symlink(linkTarget, filepath.Join(tmpDir, "symlinked-file")); err != nil {
t.Fatal(err)
}
origFileCount := 2
assertFileCount(t, tmpDir, origFileCount)
fileName := filepath.Join(tmpDir, "symlinked-file")
err := WriteFile(fileName, []byte("new content"), testMode())
if err == nil || err.Error() != "cannot write to a symbolic link directly" {
t.Errorf("Should produce a 'cannot write to a symbolic link directly' error, but got %[1]T (%[1]v)", err)
}
assertFile(t, linkTarget, originalContent, fileMode)
assertFileCount(t, tmpDir, origFileCount)
})
t.Run("symlinked directory", func(t *testing.T) {
tmpDir := t.TempDir()
actualParentDir := filepath.Join(tmpDir, "parent-dir")
if err := os.Mkdir(actualParentDir, 0o700); err != nil {
t.Fatal(err)
}
actualTargetFile := filepath.Join(actualParentDir, "target-file")
if err := os.WriteFile(actualTargetFile, []byte("orig content"), testMode()); err != nil {
t.Fatal(err)
}
parentDir := filepath.Join(tmpDir, "parent-dir-symlink")
if err := os.Symlink(actualParentDir, parentDir); err != nil {
t.Fatal(err)
}
origFileCount := 1
assertFileCount(t, actualParentDir, origFileCount)
fileName := filepath.Join(parentDir, "target-file")
fileContent := []byte("new content")
fileMode := testMode()
if err := WriteFile(fileName, fileContent, fileMode); err != nil {
t.Fatalf("Error writing to file: %v", err)
}
assertFile(t, fileName, fileContent, fileMode)
assertFile(t, actualTargetFile, fileContent, fileMode)
assertFileCount(t, actualParentDir, origFileCount)
})
}
func TestWriteSetCommit(t *testing.T) {
tmpDir := t.TempDir()
if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0o700); err != nil {
t.Fatalf("Error creating tmp directory: %s", err)
}
targetDir := filepath.Join(tmpDir, "target")
ws, err := NewWriteSet(filepath.Join(tmpDir, "tmp"))
if err != nil {
t.Fatalf("Error creating atomic write set: %s", err)
}
fileContent := []byte("file content")
fileMode := testMode()
if err := ws.WriteFile("foo", fileContent, fileMode); err != nil {
t.Fatalf("Error writing to file: %v", err)
}
if _, err := os.ReadFile(filepath.Join(targetDir, "foo")); err == nil {
t.Fatalf("Expected error reading file where should not exist")
}
if err := ws.Commit(targetDir); err != nil {
t.Fatalf("Error committing file: %s", err)
}
assertFile(t, filepath.Join(targetDir, "foo"), fileContent, fileMode)
assertFileCount(t, targetDir, 1)
}
func TestWriteSetCancel(t *testing.T) {
tmpDir := t.TempDir()
if err := os.Mkdir(filepath.Join(tmpDir, "tmp"), 0o700); err != nil {
t.Fatalf("Error creating tmp directory: %s", err)
}
ws, err := NewWriteSet(filepath.Join(tmpDir, "tmp"))
if err != nil {
t.Fatalf("Error creating atomic write set: %s", err)
}
fileContent := []byte("file content")
fileMode := testMode()
if err := ws.WriteFile("foo", fileContent, fileMode); err != nil {
t.Fatalf("Error writing to file: %v", err)
}
if err := ws.Cancel(); err != nil {
t.Fatalf("Error committing file: %s", err)
}
if _, err := os.ReadFile(filepath.Join(tmpDir, "target", "foo")); err == nil {
t.Fatalf("Expected error reading file where should not exist")
} else if !errors.Is(err, os.ErrNotExist) {
t.Fatalf("Unexpected error reading file: %s", err)
}
assertFileCount(t, filepath.Join(tmpDir, "tmp"), 0)
}

2
pkg/ioutils/fswriters_deprecated.go
View File

@ -4,7 +4,7 @@ import (
"io"
"os"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
)
// NewAtomicFileWriter returns WriteCloser so that writing to it writes to a

2
plugin/manager.go
View File

@ -19,11 +19,11 @@ import (
"github.com/docker/docker/api/types/events"
"github.com/docker/docker/internal/containerfs"
"github.com/docker/docker/internal/lazyregexp"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/docker/docker/pkg/authorization"
v2 "github.com/docker/docker/plugin/v2"
"github.com/docker/docker/registry"
"github.com/moby/pubsub"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/go-digest"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"

2
reference/store.go
View File

@ -9,7 +9,7 @@ import (
"sync"
"github.com/distribution/reference"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/moby/sys/atomicwriter"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)

1
vendor.mod
View File

@ -70,6 +70,7 @@ require (
github.com/moby/patternmatcher v0.6.0
github.com/moby/pubsub v1.0.0
github.com/moby/swarmkit/v2 v2.0.0-20250103191802-8c1959736554
github.com/moby/sys/atomicwriter v0.0.0-20250404210502-6e2523cbf3a1
github.com/moby/sys/mount v0.3.4
github.com/moby/sys/mountinfo v0.7.2
github.com/moby/sys/reexec v0.1.0

2
vendor.sum
View File

@ -397,6 +397,8 @@ github.com/moby/pubsub v1.0.0 h1:jkp/imWsmJz2f6LyFsk7EkVeN2HxR/HTTOY8kHrsxfA=
github.com/moby/pubsub v1.0.0/go.mod h1:bXSO+3h5MNXXCaEG+6/NlAIk7MMZbySZlnB+cUQhKKc=
github.com/moby/swarmkit/v2 v2.0.0-20250103191802-8c1959736554 h1:DMHJbgyNZWyrPKYjCYt2IxEO7KA0eSd4fo6KQsv2W84=
github.com/moby/swarmkit/v2 v2.0.0-20250103191802-8c1959736554/go.mod h1:mTTGIAz/59OGZR5Qe+QByIe3Nxc+sSuJkrsStFhr6Lg=
github.com/moby/sys/atomicwriter v0.0.0-20250404210502-6e2523cbf3a1 h1:RfsCoQh4+GdgY8QQ7y05leVCa8niO1Phmy5CF3YiSgo=
github.com/moby/sys/atomicwriter v0.0.0-20250404210502-6e2523cbf3a1/go.mod h1:Ul8oqv2ZMNHOceF643P6FKPXeCmYtlQMvpizfsSoaWs=
github.com/moby/sys/mount v0.3.4 h1:yn5jq4STPztkkzSKpZkLcmjue+bZJ0u2AuQY1iNI1Ww=
github.com/moby/sys/mount v0.3.4/go.mod h1:KcQJMbQdJHPlq5lcYT+/CjatWM4PuxKe+XLSVS4J6Os=
github.com/moby/sys/mountinfo v0.7.2 h1:1shs6aH5s4o5H2zQLn796ADW1wMrIwHsyJ2v9KouLrg=

202
vendor/github.com/moby/sys/atomicwriter/LICENSE generated vendored Normal file
View File

@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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other entities that control, are controlled by, or are under common
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direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
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"Work" shall mean the work of authorship, whether in Source or
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represent, as a whole, an original work of authorship. For the purposes
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0
pkg/atomicwriter/atomicwriter.go → vendor/github.com/moby/sys/atomicwriter/atomicwriter.go generated vendored
View File

3
vendor/modules.txt vendored
View File

@ -1007,6 +1007,9 @@ github.com/moby/swarmkit/v2/volumequeue
github.com/moby/swarmkit/v2/watch
github.com/moby/swarmkit/v2/watch/queue
github.com/moby/swarmkit/v2/xnet
# github.com/moby/sys/atomicwriter v0.0.0-20250404210502-6e2523cbf3a1
## explicit; go 1.18
github.com/moby/sys/atomicwriter
# github.com/moby/sys/mount v0.3.4
## explicit; go 1.17
github.com/moby/sys/mount

2
volume/local/local.go
View File

@ -16,10 +16,10 @@ import (
"github.com/containerd/log"
"github.com/docker/docker/daemon/names"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/pkg/atomicwriter"
"github.com/docker/docker/pkg/idtools"
"github.com/docker/docker/quota"
"github.com/docker/docker/volume"
"github.com/moby/sys/atomicwriter"
"github.com/pkg/errors"
)