The configureOutput method does not affect to command which added with addCommand method.

[yankos]

I want write all output with winston module. I trying to add the configureOutput method before or after all commands. It affects only command which addded with the command method. Live example

...
// Init commander.
const program = new Command()
    .name("CLI")
    .configureOutput({
        writeOut: (str) => {
            console.log("writeOut:", str);
        },
        writeErr: (str) => {
            console.log("writeErr:", str);
            console.log("Test passed!");
        },
    });

// Add one command, main way.
const command_test_as_var = program.createCommand("test_as_var");
command_test_as_var.addOption(
    new Option("--arg <arg>", "Some word.").makeOptionMandatory()
)
command_test_as_var.action(action);
program.addCommand(command_test_as_var);

// Add second command.
program
    .command("test_inline")
    .addOption(
        new Option("--arg <arg>", "Some word.",).makeOptionMandatory()
    )
    .action(action);
...

I have:

~/Commander-Async-Issue$ node ./output_issue.js test_as_var
error: required option '--arg <arg>' not specified
~/Commander-Async-Issue$ node ./output_issue.js test_inline
writeErr: error: required option '--arg <arg>' not specified

Test passed!

Expecting:

~/Commander-Async-Issue$ node ./output_issue.js test_as_var
writeErr: error: required option '--arg <arg>' not specified

Test passed!
~/Commander-Async-Issue$ node ./output_issue.js test_inline
writeErr: error: required option '--arg <arg>' not specified

Test passed!

I can call configureOutput for each command and then everything works as expected, but according to #1770 I am thinking this is a bug.

[shadowspawn]

For safety, .addCommand() does not copy the inherited settings from the parent command in case they were written independently with different expectations about the settings and the settings break the added command.

There is a helper routine .copyInheritedSettings() for copying the settings when it is wanted:

program.addCommand(command_test_as_var);
command_test_as_var.copyInheritedSettings(program);

[shadowspawn]

Added mention to README in Commander v9.4.1