cli/command/secret: remove deprecated io/ioutil

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit c558df7ced)
Signed-off-by: Cory Snider <csnider@mirantis.com>

cli/command/secret/create.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
@@ -101,7 +100,7 @@ func readSecretData(in io.ReadCloser, file string) ([]byte, error) {
 		}
 		defer in.Close()
 	}
-	data, err := ioutil.ReadAll(in)
+	data, err := io.ReadAll(in)
 	if err != nil {
 		return nil, err
 	}

cli/command/secret/create_test.go

@@ -1,7 +1,8 @@
 package secret
 
 import (
-	"io/ioutil"
+	"io"
+	"os"
 	"path/filepath"
 	"reflect"
 	"strings"
@@ -44,14 +45,14 @@ func TestSecretCreateErrors(t *testing.T) {
 			}),
 		)
 		cmd.SetArgs(tc.args)
-		cmd.SetOut(ioutil.Discard)
+		cmd.SetOut(io.Discard)
 		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
 	}
 }
 
 func TestSecretCreateWithName(t *testing.T) {
 	name := "foo"
-	data, err := ioutil.ReadFile(filepath.Join("testdata", secretDataFile))
+	data, err := os.ReadFile(filepath.Join("testdata", secretDataFile))
 	assert.NilError(t, err)
 
 	expected := swarm.SecretSpec{

cli/command/secret/inspect_test.go

@@ -2,7 +2,7 @@ package secret
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"testing"
 	"time"
 
@@ -59,7 +59,7 @@ func TestSecretInspectErrors(t *testing.T) {
 		for key, value := range tc.flags {
 			cmd.Flags().Set(key, value)
 		}
-		cmd.SetOut(ioutil.Discard)
+		cmd.SetOut(io.Discard)
 		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
 	}
 }

cli/command/secret/ls_test.go

@@ -1,7 +1,7 @@
 package secret
 
 import (
-	"io/ioutil"
+	"io"
 	"testing"
 	"time"
 
@@ -40,7 +40,7 @@ func TestSecretListErrors(t *testing.T) {
 			}),
 		)
 		cmd.SetArgs(tc.args)
-		cmd.SetOut(ioutil.Discard)
+		cmd.SetOut(io.Discard)
 		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
 	}
 }

cli/command/secret/remove_test.go

@@ -1,7 +1,7 @@
 package secret
 
 import (
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 
@@ -36,7 +36,7 @@ func TestSecretRemoveErrors(t *testing.T) {
 			}),
 		)
 		cmd.SetArgs(tc.args)
-		cmd.SetOut(ioutil.Discard)
+		cmd.SetOut(io.Discard)
 		assert.ErrorContains(t, cmd.Execute(), tc.expectedError)
 	}
 }
@@ -72,7 +72,7 @@ func TestSecretRemoveContinueAfterError(t *testing.T) {
 	})
 
 	cmd := newSecretRemoveCommand(cli)
-	cmd.SetOut(ioutil.Discard)
+	cmd.SetOut(io.Discard)
 	cmd.SetArgs(names)
 	assert.Error(t, cmd.Execute(), "error removing secret: foo")
 	assert.Check(t, is.DeepEqual(names, removedSecrets))