yarn licenses list --silent broke between 1.6.0 and 1.7.0

[rjmunro]

Do you want to request a feature or report a bug?

Bug

What is the current behavior?

yarn licenses list --silent produces no output (except warnings on stderr if applicable).

What is the expected behavior?

yarn licenses list --silent should produce the same output as yarn licenses list, except without the yarn licenses v[version] prefix and Done in [time]s. suffix lines, as it did in yarn 1.6.0.

I run yarn licenses list regularly on CI and output the results to a file. If the file changes I know I need to review the new licenses. But with this new behaviour, I can't use --silent, and the file changes all the time due to the 'Done in' time being slightly variable due to network conditions etc. I also don't want to have to change it when yarn updates.

Please mention your node.js, yarn and operating system version.

• Node: 8.9.1 (installed with nvm)
• Yarn 1.7.0, 1.8.0 (installed with installation script)
• Mac OS sierra 10.12.6

[rjmunro]

I've done some testing with git-bisect, and found the problem was introduced here: #5722

It looks like a bit of thought is needed to define output that is informational and should be suppressed with --silent and critical to the command making any sense, that should not be.

[arcanis]

The way we do this in log is by adding a force: true option (https://github.com/jxom/yarn/blob/93a6c1be1c2b7038217ffcc934499c18af97680a/src/reporters/console/console-reporter.js#L165). The same would need to be implemented for the tree command. Would you like to open a PR? 😃