Question: How can we use the connection.write using Picocli ?

[cmoulliard]

Question

How can we use the Terminal connection.write using Picocli to log messages ?

As you can see hereafter, Picocli can log easily the messages using the following stdout and printwriter method: spec.commandLine().getOut().println().

They also offer an Ansi() builder method able from a colorScheme to colorize the text colorScheme.ansi().new Text("#" + message,colorScheme) BUT their colorScheme has been designed around commands and options colors as you can see hereafter : https://github.com/remkop/picocli/blob/main/src/main/java/picocli/CommandLine.java#L17540-L17568 and then is not well suited to format/colorize logging message

package dev.snowdrop.logging;

import dev.snowdrop.logging.util.AnsiBuilder;
import dev.snowdrop.logging.util.LEVEL;
import dev.snowdrop.service.MessageService;
import jakarta.enterprise.context.ApplicationScoped;
import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.jboss.logging.Logger;
import picocli.CommandLine;

import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;

@ApplicationScoped
public class LoggingService {
    private static final Logger logger = Logger.getLogger(MessageService.class);

    private CommandLine.Model.CommandSpec spec;

    @ConfigProperty(name = "cli.mode", defaultValue = "false")
    boolean isCliMode;

    @ConfigProperty(name = "cli.logging.verbose", defaultValue = "false")
    boolean isVerbose;

    @ConfigProperty(name = "cli.logging.colored", defaultValue = "true")
    boolean useAnsiColoredMsg;
    
    private static String TIMESTAMP_COLOR = "TIMESTAMP";
    private static String MESSAGE_COLOR = "MESSAGE";

    CommandLine.Help.ColorScheme colorScheme;

    public LoggingService() {
    }

    public void info(String message) {
        // TODO: To be investigate to see if this is easier to use picocli Ansi and the colorScheme = spec.commandLine().getColorScheme();
        if (isCliMode) {
            //spec.commandLine().getOut().println(colorScheme.ansi().new Text("#" + message,colorScheme));
            spec.commandLine().getOut().println(formatedMessage(LEVEL.INFO, message));
        } else {
            logger.info(message);
        }
    }

[maxandersen]

just a comment - this isn't quarkus specific - just about how to get aeash terminal info into picocli.

[cmoulliard]

just a comment - this isn't quarkus specific - just about how to get aeash terminal info into picocli.

Correct. I removed from the title and description the mention about Quarkus

[stalep]

Hm, atm there are no straight forward integration points as Picocli do not expose a way to set the input/output stream. We would need to create an extension similar to what they've done for JLine. What you can do is to use æsh's Terminal and Readline api and the call the Picocli command like:
`TerminalConnection connection = new TerminalConnection();
Readline readline = new Readline();

// Set up readline with command completion
readline.readline(connection, "prompt> ", line -> {
// Parse with picocli
new CommandLine(new MyCommand()).execute(line.split("\s+"));
});

connection.openBlocking();`

Or something like that.