Add possibility to set program.on("close") event or event for all commands

[prokopsimek]

I continue in our discussion in closed PR here: #996

My intent is to display a notification about the new package version in CLI at the end of each run of any command.

I have prepared my intended implementation here: DXHeroes/dx-scanner#232 (review) (the PR is invalid)

[shadowspawn]

There isn't currently a generic event after any command runs.

How about checking for the notification after calling parse? It seems this might have a similar outcome that the notification is displayed if the parse did not detect errors or display the help, but I may be missing some of your workflow cases.

    await cmder.parseAsync(process.argv);
    this.notifyUpdate);

[prokopsimek]

Thanks, I'll try that and give feedback.

[prokopsimek]

@shadowspawn Wow, it works! 🎉
It works if I run a subcommand (e.g. ./bin/run practices) but doesn't work if I run a root command that displays help (just ./bin/run). The .help function terminates with process.exit(0)?

   if (!process.argv.slice(2).length) {
      cmder.help();
    }

ref.: https://github.com/DXHeroes/dx-scanner/pull/231/files#diff-f41e9d04a45c83f3b6f6e630f10117feR77-R79

[shadowspawn]

.outputHelp() displays the help without calling exit.

[shadowspawn]

This was a specific case which might have been resolved, and no recent activity. Closing in favour of #1197.

Feel free to open a new issue if it comes up again, with new information and renewed interest.

Thank you for your contributions.

[prokopsimek]

@shadowspawn Thanks for your help! It was a great experience. 🙂 👍