[Feature] lerna --dryrun

Hi,

Really liking lerna so far. However I’ve encountered some unexpected behavior that wound up getting pushed to our public repo and published to npm.

I’d like to be able to run lerna publish to the point of creating the version commit and tag and stop it there so I can inspect what it did before proceeding.

My first thought for an interface for this is:

$ lerna prepublish
... make sure everything's as expected...
$ lerna publish

Where in this case lerna publish would see that the head revision is a version tag and skip the prepublish steps.

It might also be nice to have a lerna revert that’s basically just git reset --hard HEAD^ after verifying that the HEAD revision is a version commit.

I’d be happy to do the work for this and submit a PR if you’re open to the idea. How does it sound? Ideas for a better interface?

Thanks!

Bo

[tamlyn]

An alternative way to test what lerna will do is to install a local npm registry and publish to that:

npm i -g verdaccio
verdaccio
npm set registry http://localhost:4873
npm adduser --registry http://localhost:4873
lerna publish

Then use npm pack <name> to inspect the tarballs it published.

(Updated to use verdaccio which is a more up to date fork of sinopia.)

[jamiebuilds]

Oh like a --dry-run flag