[question] what is the difference between yarn install and yarn upgrade

[daprahamian]

It seems that yarn install updates dependencies and modifies the lockfile in the same way as yarn upgrade. What is the difference?

[ddgenome]

What you are seeing might be a bug: #3315

Are versions getting updated or just collapsed/rearranged?

[daprahamian]

they are getting update.

To give a full overview of my behavior, here are my steps:

1. Do a clean yarn install
2. Do a second yarn install to verify that nothing has changed.
3. Change a dependency in package.json
4. Run either yarn install or yarn upgrade

I don't necessarily believe this is a bug, since I am not running with --pure-lockfile (and I know there is a discussion over that in #570 ). I'm just trying to clarify what the difference is between yarn install and yarn upgrade? Seems like if they do the same thing, there should be only one command.

[ddgenome]

If all were working correctly, my understanding is that there is a difference.

yarn or yarn install: if the current yarn.lock file satisfies current package.json, it installs things according to the yarn.lock. If the current yarn.lock does not satisfy the current package.json, upgrade packages and yarn.lock as necessary to satisfy package.json.

yarn upgrade: upgrade all dependencies to the latest versions that satisfy package.json, updating yarn.lock accordingly.

[bestander]

Sounds right, @ddgenome