Internal logging package and a test-utils package to help them

[ajaymathur]

re: #142

Adding two packages, @changesets/logger and @changesets/test-utils.

@changesets/logger

Log messages to stdout.

Usage:

import { warn } from "@changesets/logger";

warn('message part 1', 'message part 2');

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@changesets/test-utils

All test utilities, at the moment only one - temporarilySilenceLogs, it will silence all logs done in the changesets file. **It will not highjack console, therefore console.*(xxx) will still. Which in my perspective is needed to not accidentally silence the error message.

// In tests
import { temporarilySilenceLogs } from "@changesets/test-utils";

temporarilySilenceLogs();

• Add a logger
  • add package.
  • add tests and documentation.
  • change usage in the cli package.
  • Method to silent the internal logging in tests.
  • Document this internal logging.

---

This PR is in progress, but inputs at any step are welcome.

[changeset-bot]

🦋 Changeset is good to go

Latest commit: 86892f9

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[emmatown]

Thanks for this!!

[emmatown]

I really like this, talking about it when to use them is great!

[emmatown]

Also: needs a changeset/changesets

[ajaymathur]

The commit history is not pretty at the moment. I feel some of the messages can be improved and some commits be squashed. I am spend time in fixing the messages. If we do a merge. Else we can update message on squash and commit. 🙂

[emmatown]

Could you split the changeset into two, one for logger and test-utils that says initial release and another for cli that says it's using @changesets/logger? Apart from that, LGTM. re commits: we'll squash merge.

[emmatown]

Thanks!!

[ajaymathur]

Hey @mitchellhamilton, Thanks for reviewing the PR. Should we merge it?

[emmatown]

I was going to wait for @Noviny to ✅ it but it's not really a change that's likely to cause problems so let's merge it.