Merge d6ce04640f into 9861ce90fd

cli/command/container: fix missing go:build tag

Dockerfile

@@ -8,8 +8,8 @@ ARG GO_VERSION=1.23.3
 ARG XX_VERSION=1.5.0
 ARG GOVERSIONINFO_VERSION=v1.3.0
 ARG GOTESTSUM_VERSION=v1.10.0
-ARG BUILDX_VERSION=0.17.1
-ARG COMPOSE_VERSION=v2.29.7
+ARG BUILDX_VERSION=0.18.0
+ARG COMPOSE_VERSION=v2.30.3
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
 

cli/command/container/completion.go

@@ -1,3 +1,7 @@
+// FIXME(thaJeztah): remove once we are a module; the go:build directive prevents go from downgrading language version to go1.16:
+//go:build go1.22
+// +build go1.22
+
 package container
 
 import (
@@ -44,6 +48,65 @@ var allLinuxCapabilities = sync.OnceValue(func() []string {
 	return out
 })
 
+// logDriverOptions provides the options for each built-in logging driver.
+var logDriverOptions = map[string][]string{
+	"awslogs": {
+		"max-buffer-size", "mode", "awslogs-create-group", "awslogs-credentials-endpoint", "awslogs-datetime-format",
+		"awslogs-group", "awslogs-multiline-pattern", "awslogs-region", "awslogs-stream", "tag",
+	},
+	"fluentd": {
+		"max-buffer-size", "mode", "env", "env-regex", "labels", "fluentd-address", "fluentd-async",
+		"fluentd-buffer-limit", "fluentd-request-ack", "fluentd-retry-wait", "fluentd-max-retries",
+		"fluentd-sub-second-precision", "tag",
+	},
+	"gcplogs": {
+		"max-buffer-size", "mode", "env", "env-regex", "labels", "gcp-log-cmd", "gcp-meta-id", "gcp-meta-name",
+		"gcp-meta-zone", "gcp-project",
+	},
+	"gelf": {
+		"max-buffer-size", "mode", "env", "env-regex", "labels", "gelf-address", "gelf-compression-level",
+		"gelf-compression-type", "gelf-tcp-max-reconnect", "gelf-tcp-reconnect-delay", "tag",
+	},
+	"journald":  {"max-buffer-size", "mode", "env", "env-regex", "labels", "tag"},
+	"json-file": {"max-buffer-size", "mode", "env", "env-regex", "labels", "compress", "max-file", "max-size"},
+	"local":     {"max-buffer-size", "mode", "compress", "max-file", "max-size"},
+	"none":      {},
+	"splunk": {
+		"max-buffer-size", "mode", "env", "env-regex", "labels", "splunk-caname", "splunk-capath", "splunk-format",
+		"splunk-gzip", "splunk-gzip-level", "splunk-index", "splunk-insecureskipverify", "splunk-source",
+		"splunk-sourcetype", "splunk-token", "splunk-url", "splunk-verify-connection", "tag",
+	},
+	"syslog": {
+		"max-buffer-size", "mode", "env", "env-regex", "labels", "syslog-address", "syslog-facility", "syslog-format",
+		"syslog-tls-ca-cert", "syslog-tls-cert", "syslog-tls-key", "syslog-tls-skip-verify", "tag",
+	},
+}
+
+// builtInLogDrivers provides a list of the built-in logging drivers.
+var builtInLogDrivers = sync.OnceValue(func() []string {
+	drivers := make([]string, 0, len(logDriverOptions))
+	for driver := range logDriverOptions {
+		drivers = append(drivers, driver)
+	}
+	return drivers
+})
+
+// allLogDriverOptions provides all options of the built-in logging drivers.
+// The list does not contain duplicates.
+var allLogDriverOptions = sync.OnceValue(func() []string {
+	var result []string
+	seen := make(map[string]bool)
+	for driver := range logDriverOptions {
+		for _, opt := range logDriverOptions[driver] {
+			if !seen[opt] {
+				seen[opt] = true
+				result = append(result, opt)
+			}
+		}
+	}
+	return result
+})
+
 // restartPolicies is a list of all valid restart-policies..
 //
 // TODO(thaJeztah): add descriptions, and enable descriptions for our completion scripts (cobra.CompletionOptions.DisableDescriptions is currently set to "true")
@@ -54,6 +117,207 @@ var restartPolicies = []string{
 	string(container.RestartPolicyUnlessStopped),
 }
 
+// addCompletions adds the completions that `run` and `create` have in common.
+func addCompletions(cmd *cobra.Command, dockerCLI completion.APIClientProvider) {
+	_ = cmd.RegisterFlagCompletionFunc("attach", completion.FromList("stderr", "stdin", "stdout"))
+	_ = cmd.RegisterFlagCompletionFunc("cap-add", completeLinuxCapabilityNames)
+	_ = cmd.RegisterFlagCompletionFunc("cap-drop", completeLinuxCapabilityNames)
+	_ = cmd.RegisterFlagCompletionFunc("cgroupns", completeCgroupns())
+	_ = cmd.RegisterFlagCompletionFunc("env", completion.EnvVarNames)
+	_ = cmd.RegisterFlagCompletionFunc("env-file", completion.FileNames)
+	_ = cmd.RegisterFlagCompletionFunc("ipc", completeIpc(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("link", completeLink(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("log-driver", completeLogDriver(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("log-opt", completeLogOpt)
+	_ = cmd.RegisterFlagCompletionFunc("network", completion.NetworkNames(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("pid", completePid(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
+	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
+	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
+	_ = cmd.RegisterFlagCompletionFunc("security-opt", completeSecurityOpt)
+	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)
+	_ = cmd.RegisterFlagCompletionFunc("storage-opt", completeStorageOpt)
+	_ = cmd.RegisterFlagCompletionFunc("ulimit", completeUlimit)
+	_ = cmd.RegisterFlagCompletionFunc("userns", completion.FromList("host"))
+	_ = cmd.RegisterFlagCompletionFunc("uts", completion.FromList("host"))
+	_ = cmd.RegisterFlagCompletionFunc("volume-driver", completeVolumeDriver(dockerCLI))
+	_ = cmd.RegisterFlagCompletionFunc("volumes-from", completion.ContainerNames(dockerCLI, true))
+}
+
+// completeCgroupns implements shell completion for the `--cgroupns` option of `run` and `create`.
+func completeCgroupns() completion.ValidArgsFn {
+	return completion.FromList(string(container.CgroupnsModeHost), string(container.CgroupnsModePrivate))
+}
+
+// completeDetachKeys implements shell completion for the `--detach-keys` option of `run` and `create`.
+func completeDetachKeys(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+	return []string{"ctrl-"}, cobra.ShellCompDirectiveNoSpace
+}
+
+// completeIpc implements shell completion for the `--ipc` option of `run` and `create`.
+// The completion is partly composite.
+func completeIpc(dockerCLI completion.APIClientProvider) func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		if len(toComplete) > 0 && strings.HasPrefix("container", toComplete) { //nolint:gocritic // not swapped, matches partly typed "container"
+			return []string{"container:"}, cobra.ShellCompDirectiveNoSpace
+		}
+		if strings.HasPrefix(toComplete, "container:") {
+			names, _ := completion.ContainerNames(dockerCLI, true)(cmd, args, toComplete)
+			return prefixWith("container:", names), cobra.ShellCompDirectiveNoFileComp
+		}
+		return []string{
+			string(container.IPCModeContainer + ":"),
+			string(container.IPCModeHost),
+			string(container.IPCModeNone),
+			string(container.IPCModePrivate),
+			string(container.IPCModeShareable),
+		}, cobra.ShellCompDirectiveNoFileComp
+	}
+}
+
+// completeLink implements shell completion for the `--link` option  of `run` and `create`.
+func completeLink(dockerCLI completion.APIClientProvider) func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		return postfixWith(":", containerNames(dockerCLI, cmd, args, toComplete)), cobra.ShellCompDirectiveNoSpace
+	}
+}
+
+// completeLogDriver implements shell completion for the `--log-driver` option  of `run` and `create`.
+// The log drivers are collected from a call to the Info endpoint with a fallback to a hard-coded list
+// of the build-in log drivers.
+func completeLogDriver(dockerCLI completion.APIClientProvider) completion.ValidArgsFn {
+	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		info, err := dockerCLI.Client().Info(cmd.Context())
+		if err != nil {
+			return builtInLogDrivers(), cobra.ShellCompDirectiveNoFileComp
+		}
+		drivers := info.Plugins.Log
+		return drivers, cobra.ShellCompDirectiveNoFileComp
+	}
+}
+
+// completeLogOpt implements shell completion for the `--log-opt` option  of `run` and `create`.
+// If the user supplied a log-driver, only options for that driver are returned.
+func completeLogOpt(cmd *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+	driver, _ := cmd.Flags().GetString("log-driver")
+	if options, exists := logDriverOptions[driver]; exists {
+		return postfixWith("=", options), cobra.ShellCompDirectiveNoSpace | cobra.ShellCompDirectiveNoFileComp
+	}
+	return postfixWith("=", allLogDriverOptions()), cobra.ShellCompDirectiveNoSpace
+}
+
+// completePid implements shell completion for the `--pid` option  of `run` and `create`.
+func completePid(dockerCLI completion.APIClientProvider) func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		if len(toComplete) > 0 && strings.HasPrefix("container", toComplete) { //nolint:gocritic // not swapped, matches partly typed "container"
+			return []string{"container:"}, cobra.ShellCompDirectiveNoSpace
+		}
+		if strings.HasPrefix(toComplete, "container:") {
+			names, _ := completion.ContainerNames(dockerCLI, true)(cmd, args, toComplete)
+			return prefixWith("container:", names), cobra.ShellCompDirectiveNoFileComp
+		}
+		return []string{"container:", "host"}, cobra.ShellCompDirectiveNoFileComp
+	}
+}
+
+// completeSecurityOpt implements shell completion for the `--security-opt` option of `run` and `create`.
+// The completion is partly composite.
+func completeSecurityOpt(_ *cobra.Command, _ []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+	if len(toComplete) > 0 && strings.HasPrefix("apparmor=", toComplete) { //nolint:gocritic // not swapped, matches partly typed "apparmor="
+		return []string{"apparmor="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if len(toComplete) > 0 && strings.HasPrefix("label", toComplete) { //nolint:gocritic // not swapped, matches partly typed "label"
+		return []string{"label="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if strings.HasPrefix(toComplete, "label=") {
+		if strings.HasPrefix(toComplete, "label=d") {
+			return []string{"label=disable"}, cobra.ShellCompDirectiveNoFileComp
+		}
+		labels := []string{"disable", "level:", "role:", "type:", "user:"}
+		return prefixWith("label=", labels), cobra.ShellCompDirectiveNoSpace | cobra.ShellCompDirectiveNoFileComp
+	}
+	// length must be > 1 here so that completion of "s" falls through.
+	if len(toComplete) > 1 && strings.HasPrefix("seccomp", toComplete) { //nolint:gocritic // not swapped, matches partly typed "seccomp"
+		return []string{"seccomp="}, cobra.ShellCompDirectiveNoSpace
+	}
+	if strings.HasPrefix(toComplete, "seccomp=") {
+		return []string{"seccomp=unconfined"}, cobra.ShellCompDirectiveNoFileComp
+	}
+	return []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"}, cobra.ShellCompDirectiveNoFileComp
+}
+
+// completeStorageOpt implements shell completion for the `--storage-opt` option  of `run` and `create`.
+func completeStorageOpt(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+	return []string{"size="}, cobra.ShellCompDirectiveNoSpace
+}
+
+// completeUlimit implements shell completion for the `--ulimit` option of `run` and `create`.
+func completeUlimit(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+	limits := []string{
+		"as",
+		"chroot",
+		"core",
+		"cpu",
+		"data",
+		"fsize",
+		"locks",
+		"maxlogins",
+		"maxsyslogins",
+		"memlock",
+		"msgqueue",
+		"nice",
+		"nofile",
+		"nproc",
+		"priority",
+		"rss",
+		"rtprio",
+		"sigpending",
+		"stack",
+	}
+	return postfixWith("=", limits), cobra.ShellCompDirectiveNoSpace
+}
+
+// completeVolumeDriver contacts the API to get the built-in and installed volume drivers.
+func completeVolumeDriver(dockerCLI completion.APIClientProvider) completion.ValidArgsFn {
+	return func(cmd *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+		info, err := dockerCLI.Client().Info(cmd.Context())
+		if err != nil {
+			// fallback: the built-in drivers
+			return []string{"local"}, cobra.ShellCompDirectiveNoFileComp
+		}
+		drivers := info.Plugins.Volume
+		return drivers, cobra.ShellCompDirectiveNoFileComp
+	}
+}
+
+// containerNames contacts the API to get names and optionally IDs of containers.
+// In case of an error, an empty list is returned.
+func containerNames(dockerCLI completion.APIClientProvider, cmd *cobra.Command, args []string, toComplete string) []string {
+	names, _ := completion.ContainerNames(dockerCLI, true)(cmd, args, toComplete)
+	if names == nil {
+		return []string{}
+	}
+	return names
+}
+
+// prefixWith prefixes every element in the slice with the given prefix.
+func prefixWith(prefix string, values []string) []string {
+	result := make([]string, len(values))
+	for i, v := range values {
+		result[i] = prefix + v
+	}
+	return result
+}
+
+// postfixWith appends postfix to every element in the slice.
+func postfixWith(postfix string, values []string) []string {
+	result := make([]string, len(values))
+	for i, v := range values {
+		result[i] = v + postfix
+	}
+	return result
+}
+
 func completeLinuxCapabilityNames(cmd *cobra.Command, args []string, toComplete string) (names []string, _ cobra.ShellCompDirective) {
 	return completion.FromList(allLinuxCapabilities()...)(cmd, args, toComplete)
 }

cli/command/container/completion_test.go

@@ -4,6 +4,9 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/docker/cli/internal/test"
+	"github.com/docker/cli/internal/test/builders"
+	"github.com/docker/docker/api/types/container"
 	"github.com/moby/sys/signal"
 	"github.com/spf13/cobra"
 	"gotest.tools/v3/assert"
@@ -21,6 +24,48 @@ func TestCompleteLinuxCapabilityNames(t *testing.T) {
 	}
 }
 
+func TestCompletePid(t *testing.T) {
+	tests := []struct {
+		containerListFunc   func(container.ListOptions) ([]container.Summary, error)
+		toComplete          string
+		expectedCompletions []string
+		expectedDirective   cobra.ShellCompDirective
+	}{
+		{
+			toComplete:          "",
+			expectedCompletions: []string{"container:", "host"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "c",
+			expectedCompletions: []string{"container:"},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace,
+		},
+		{
+			containerListFunc: func(container.ListOptions) ([]container.Summary, error) {
+				return []container.Summary{
+					*builders.Container("c1"),
+					*builders.Container("c2"),
+				}, nil
+			},
+			toComplete:          "container:",
+			expectedCompletions: []string{"container:c1", "container:c2"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.toComplete, func(t *testing.T) {
+			cli := test.NewFakeCli(&fakeClient{
+				containerListFunc: tc.containerListFunc,
+			})
+			completions, directive := completePid(cli)(NewRunCommand(cli), nil, tc.toComplete)
+			assert.Check(t, is.DeepEqual(completions, tc.expectedCompletions))
+			assert.Check(t, is.Equal(directive, tc.expectedDirective))
+		})
+	}
+}
+
 func TestCompleteRestartPolicies(t *testing.T) {
 	values, directives := completeRestartPolicies(nil, nil, "")
 	assert.Check(t, is.Equal(directives&cobra.ShellCompDirectiveNoFileComp, cobra.ShellCompDirectiveNoFileComp), "Should not perform file completion")
@@ -28,6 +73,59 @@ func TestCompleteRestartPolicies(t *testing.T) {
 	assert.Check(t, is.DeepEqual(values, expected))
 }
 
+func TestCompleteSecurityOpt(t *testing.T) {
+	tests := []struct {
+		toComplete          string
+		expectedCompletions []string
+		expectedDirective   cobra.ShellCompDirective
+	}{
+		{
+			toComplete:          "",
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "apparmor=",
+			expectedCompletions: []string{"apparmor="},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace,
+		},
+		{
+			toComplete:          "label=",
+			expectedCompletions: []string{"label=disable", "label=level:", "label=role:", "label=type:", "label=user:"},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace | cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete: "s",
+			// We do not filter matching completions but delegate this task to the shell script.
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "se",
+			expectedCompletions: []string{"seccomp="},
+			expectedDirective:   cobra.ShellCompDirectiveNoSpace,
+		},
+		{
+			toComplete:          "seccomp=",
+			expectedCompletions: []string{"seccomp=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+		{
+			toComplete:          "sy",
+			expectedCompletions: []string{"apparmor=", "label=", "no-new-privileges", "seccomp=", "systempaths=unconfined"},
+			expectedDirective:   cobra.ShellCompDirectiveNoFileComp,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.toComplete, func(t *testing.T) {
+			completions, directive := completeSecurityOpt(nil, nil, tc.toComplete)
+			assert.Check(t, is.DeepEqual(completions, tc.expectedCompletions))
+			assert.Check(t, is.Equal(directive, tc.expectedDirective))
+		})
+	}
+}
+
 func TestCompleteSignals(t *testing.T) {
 	values, directives := completeSignals(nil, nil, "")
 	assert.Check(t, is.Equal(directives&cobra.ShellCompDirectiveNoFileComp, cobra.ShellCompDirectiveNoFileComp), "Should not perform file completion")

cli/command/container/create.go

@@ -78,16 +78,15 @@ func NewCreateCommand(dockerCli command.Cli) *cobra.Command {
 	command.AddTrustVerificationFlags(flags, &options.untrusted, dockerCli.ContentTrustEnabled())
 	copts = addFlags(flags)
 
-	_ = cmd.RegisterFlagCompletionFunc("cap-add", completeLinuxCapabilityNames)
-	_ = cmd.RegisterFlagCompletionFunc("cap-drop", completeLinuxCapabilityNames)
-	_ = cmd.RegisterFlagCompletionFunc("env", completion.EnvVarNames)
-	_ = cmd.RegisterFlagCompletionFunc("env-file", completion.FileNames)
-	_ = cmd.RegisterFlagCompletionFunc("network", completion.NetworkNames(dockerCli))
-	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
-	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
-	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
-	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)
-	_ = cmd.RegisterFlagCompletionFunc("volumes-from", completion.ContainerNames(dockerCli, true))
+	addCompletions(cmd, dockerCli)
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		// Set a default completion function if none was set. We don't look
+		// up if it does already have one set, because Cobra does this for
+		// us, and returns an error (which we ignore for this reason).
+		_ = cmd.RegisterFlagCompletionFunc(flag.Name, completion.NoComplete)
+	})
+
 	return cmd
 }
 

cli/command/container/run.go

@@ -69,16 +69,16 @@ func NewRunCommand(dockerCli command.Cli) *cobra.Command {
 	command.AddTrustVerificationFlags(flags, &options.untrusted, dockerCli.ContentTrustEnabled())
 	copts = addFlags(flags)
 
-	_ = cmd.RegisterFlagCompletionFunc("cap-add", completeLinuxCapabilityNames)
-	_ = cmd.RegisterFlagCompletionFunc("cap-drop", completeLinuxCapabilityNames)
-	_ = cmd.RegisterFlagCompletionFunc("env", completion.EnvVarNames)
-	_ = cmd.RegisterFlagCompletionFunc("env-file", completion.FileNames)
-	_ = cmd.RegisterFlagCompletionFunc("network", completion.NetworkNames(dockerCli))
-	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
-	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
-	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
-	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)
-	_ = cmd.RegisterFlagCompletionFunc("volumes-from", completion.ContainerNames(dockerCli, true))
+	_ = cmd.RegisterFlagCompletionFunc("detach-keys", completeDetachKeys)
+	addCompletions(cmd, dockerCli)
+
+	flags.VisitAll(func(flag *pflag.Flag) {
+		// Set a default completion function if none was set. We don't look
+		// up if it does already have one set, because Cobra does this for
+		// us, and returns an error (which we ignore for this reason).
+		_ = cmd.RegisterFlagCompletionFunc(flag.Name, completion.NoComplete)
+	})
+
 	return cmd
 }
 

cmd/docker/docker.go

@@ -19,8 +19,10 @@ import (
 	cliflags "github.com/docker/cli/cli/flags"
 	"github.com/docker/cli/cli/version"
 	platformsignals "github.com/docker/cli/cmd/docker/internal/signals"
+
 	"github.com/docker/docker/api/types/versions"
 	"github.com/docker/docker/errdefs"
+	"github.com/docker/docker/pkg/reexec"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -29,6 +31,10 @@ import (
 )
 
 func main() {
+	if reexec.Init() {
+		return
+	}
+
 	err := dockerMain(context.Background())
 	if err != nil && !errdefs.IsCancelled(err) {
 		_, _ = fmt.Fprintln(os.Stderr, err)

cmd/docker/file_helper.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"os"
+
+	credhelpers "github.com/docker/docker-credential-helpers/credentials"
+	"github.com/docker/docker/pkg/reexec"
+
+	"github.com/docker/cli/cli/config"
+	"github.com/docker/cli/cli/config/credentials"
+	"github.com/docker/cli/cli/config/types"
+)
+
+//nolint:gosec // ignore G101: Potential hardcoded credentials
+const fileCredsHelperBinary = "docker-credential-file"
+
+func init() {
+	reexec.Register(fileCredsHelperBinary, serveFileCredHelper)
+}
+
+func serveFileCredHelper() {
+	configfile := config.LoadDefaultConfigFile(os.Stderr)
+	store := credentials.NewFileStore(configfile)
+	credhelpers.Serve(&FileHelper{
+		fileStore: store,
+	})
+}
+
+var _ credhelpers.Helper = &FileHelper{}
+
+type FileHelper struct {
+	fileStore credentials.Store
+}
+
+func (f *FileHelper) Add(creds *credhelpers.Credentials) error {
+	return f.fileStore.Store(types.AuthConfig{
+		Username:      creds.Username,
+		Password:      creds.Secret,
+		ServerAddress: creds.ServerURL,
+	})
+}
+
+func (f *FileHelper) Delete(serverAddress string) error {
+	return f.fileStore.Erase(serverAddress)
+}
+
+func (f *FileHelper) Get(serverAddress string) (string, string, error) {
+	authConfig, err := f.fileStore.Get(serverAddress)
+	if err != nil {
+		return "", "", err
+	}
+
+	return authConfig.Username, authConfig.Password, nil
+}
+
+func (f *FileHelper) List() (map[string]string, error) {
+	creds := make(map[string]string)
+
+	authConfig, err := f.fileStore.GetAll()
+	if err != nil {
+		return nil, err
+	}
+
+	for k, v := range authConfig {
+		creds[k] = v.Username
+	}
+
+	return creds, nil
+}

vendor/github.com/docker/docker/pkg/reexec/command_linux.go

@@ -0,0 +1,26 @@
+package reexec
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// Command returns an [*exec.Cmd] which has Path as current binary which,
+// on Linux, is set to the in-memory version (/proc/self/exe) of the current
+// binary, it is thus safe to delete or replace the on-disk binary (os.Args[0]).
+//
+// On Linux, the Pdeathsig of [*exec.Cmd.SysProcAttr] is set to SIGTERM.
+// This signal will be sent to the process when the OS thread which created
+// the process dies.
+//
+// It is the caller's responsibility to ensure that the creating thread is
+// not terminated prematurely. See https://go.dev/issue/27505 for more details.
+func Command(args ...string) *exec.Cmd {
+	return &exec.Cmd{
+		Path: Self(),
+		Args: args,
+		SysProcAttr: &syscall.SysProcAttr{
+			Pdeathsig: syscall.SIGTERM,
+		},
+	}
+}

vendor/github.com/docker/docker/pkg/reexec/command_other.go

@@ -0,0 +1,19 @@
+//go:build freebsd || darwin || windows
+
+package reexec
+
+import (
+	"os/exec"
+)
+
+// Command returns *exec.Cmd with its Path set to the path of the current
+// binary using the result of [Self]. For example if current binary is
+// "my-binary" at "/usr/bin/" (or "my-binary.exe" at "C:\" on Windows),
+// then cmd.Path is set to "/usr/bin/my-binary" and "C:\my-binary.exe"
+// respectively.
+func Command(args ...string) *exec.Cmd {
+	return &exec.Cmd{
+		Path: Self(),
+		Args: args,
+	}
+}

vendor/github.com/docker/docker/pkg/reexec/command_unsupported.go

@@ -0,0 +1,12 @@
+//go:build !linux && !windows && !freebsd && !darwin
+
+package reexec
+
+import (
+	"os/exec"
+)
+
+// Command is unsupported on operating systems apart from Linux, Windows, and Darwin.
+func Command(args ...string) *exec.Cmd {
+	return nil
+}

vendor/github.com/docker/docker/pkg/reexec/reexec.go

@@ -0,0 +1,64 @@
+// Package reexec facilitates the busybox style reexec of a binary.
+//
+// Handlers can be registered with a name and the argv 0 of the exec of
+// the binary will be used to find and execute custom init paths.
+//
+// It is used in dockerd to work around forking limitations when using Go.
+package reexec
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+)
+
+var registeredInitializers = make(map[string]func())
+
+// Register adds an initialization func under the specified name. It panics
+// if the given name is already registered.
+func Register(name string, initializer func()) {
+	if _, exists := registeredInitializers[name]; exists {
+		panic(fmt.Sprintf("reexec func already registered under name %q", name))
+	}
+
+	registeredInitializers[name] = initializer
+}
+
+// Init is called as the first part of the exec process and returns true if an
+// initialization function was called.
+func Init() bool {
+	if initializer, ok := registeredInitializers[os.Args[0]]; ok {
+		initializer()
+		return true
+	}
+	return false
+}
+
+// Self returns the path to the current process's binary. On Linux, it
+// returns "/proc/self/exe", which provides the in-memory version of the
+// current binary, whereas on other platforms it attempts to looks up the
+// absolute path for os.Args[0], or otherwise returns os.Args[0] as-is.
+func Self() string {
+	if runtime.GOOS == "linux" {
+		return "/proc/self/exe"
+	}
+	return naiveSelf()
+}
+
+func naiveSelf() string {
+	name := os.Args[0]
+	if filepath.Base(name) == name {
+		if lp, err := exec.LookPath(name); err == nil {
+			return lp
+		}
+	}
+	// handle conversion of relative paths to absolute
+	if absName, err := filepath.Abs(name); err == nil {
+		return absName
+	}
+	// if we couldn't get absolute name, return original
+	// (NOTE: Go only errors on Abs() if os.Getwd fails)
+	return name
+}

vendor/modules.txt

@@ -91,6 +91,7 @@ github.com/docker/docker/pkg/longpath
 github.com/docker/docker/pkg/pools
 github.com/docker/docker/pkg/process
 github.com/docker/docker/pkg/progress
+github.com/docker/docker/pkg/reexec
 github.com/docker/docker/pkg/stdcopy
 github.com/docker/docker/pkg/streamformatter
 github.com/docker/docker/pkg/stringid