cli/command: remove deprecated DockerCli.Apply

The Apply method was added when CLI options for constructing the CLI were
rewritten into functional options in [cli@7f207f3]. There was no mention
in the pull request of this method specifically, and this may have been
related to work being done elsewhere on compose-on-kubernetes or the
compose-cli plugin that may have needed options to modify the CLI config
after it was already initialized.

The CLI itself no longer depends on this method since [cli@133279f], and
there are no known external users. It was deprecated in [cli@24bfedf],
which is included in the 28.5.0 release, so we can remove it for 29.0.

[cli@7f207f3]: https://github.com/docker/cli/commit/7f207f3f957ed3f5129aeb22bef2a429c14caf22
[cli@133279f]: https://github.com/docker/cli/commit/133279fb0d4adea30d27d27eb8789b79405fc82b
[cli@24bfedf]: https://github.com/docker/cli/commit/24bfedf3f88762bcd46e6452d6547d838f780e6b

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/cli.go

@@ -566,18 +566,6 @@ func (cli *DockerCli) initialize() error {
 	return cli.initErr
 }
 
-// Apply all the operation on the cli
-//
-// Deprecated: this method is no longer used and will be removed in the next release if there are no remaining users.
-func (cli *DockerCli) Apply(ops ...CLIOption) error {
-	for _, op := range ops {
-		if err := op(cli); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // ServerInfo stores details about the supported features and platform of the
 // server
 type ServerInfo struct {

cli/command/cli_test.go

@@ -255,8 +255,14 @@ func TestInitializeFromClientHangs(t *testing.T) {
 }
 
 func TestNewDockerCliAndOperators(t *testing.T) {
-	// Test default operations and also overriding default ones
-	cli, err := NewDockerCli(WithInputStream(io.NopCloser(strings.NewReader("some input"))))
+	outbuf := bytes.NewBuffer(nil)
+	errbuf := bytes.NewBuffer(nil)
+
+	cli, err := NewDockerCli(
+		WithInputStream(io.NopCloser(strings.NewReader("some input"))),
+		WithOutputStream(outbuf),
+		WithErrorStream(errbuf),
+	)
 	assert.NilError(t, err)
 	// Check streams are initialized
 	assert.Check(t, cli.In() != nil)
@@ -266,19 +272,6 @@ func TestNewDockerCliAndOperators(t *testing.T) {
 	assert.NilError(t, err)
 	assert.Equal(t, string(inputStream), "some input")
 
-	// Apply can modify a dockerCli after construction
-	outbuf := bytes.NewBuffer(nil)
-	errbuf := bytes.NewBuffer(nil)
-	err = cli.Apply(
-		WithInputStream(io.NopCloser(strings.NewReader("input"))),
-		WithOutputStream(outbuf),
-		WithErrorStream(errbuf),
-	)
-	assert.NilError(t, err)
-	// Check input stream
-	inputStream, err = io.ReadAll(cli.In())
-	assert.NilError(t, err)
-	assert.Equal(t, string(inputStream), "input")
 	// Check output stream
 	_, err = fmt.Fprint(cli.Out(), "output")
 	assert.NilError(t, err)