Add expected prettier version in config

Hi,

I think it would be nice to be able to define a version in .prettierrc.

The idea is that if you set version= "^1.6.1" in .prettierrc, running Prettier 1.5 on the project would fail.

This would prevent other team members with globally installed old versions of prettier to reformat the code in “the old way” when rules of prettier change across versions (see for example JSX formatting changes between 1.5 => 1.6)

[suchipi]

@lydell

Did I misunderstand the package.json proposal here? I thought it was about adding code to Prettier that reads package.json and checks if “prettier”: “…” in there matches the version of Prettier that is running. So this shouldn’t be closed?

That was my understanding as well

[lydell]

I guess this could also be solved in a general way by using one of those automatic git hook installers adding a “run npm install/yarn if package.json or package-lock.json/yarn.lock has changed after git pull”. That would also protect against eslint --fix resulting in the same issue.