typescript peerDependency blocks npm shrinkwrap

[zaggino]

Please use "typescript": "*" or at least "typescript": "^2.0.0" in peerDependencies as current "typescript": "~2.0.3" means that typescript <2.1.0 is required.

This happens on my machine with "typescript": "2.1.6", and "typescript-eslint-parser": "1.0.3", in package.json:

npm WARN typescript-eslint-parser@1.0.3 requires a peer of typescript@~2.0.3 but none was installed.
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\Zaggi\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "shrinkwrap"
npm ERR! node v7.5.0
npm ERR! npm  v4.2.0

npm ERR! Problems were encountered
npm ERR! Please correct and try again.
npm ERR! peer invalid: typescript@~2.0.3, required by typescript-eslint-parser@1.0.3

[soda0289]

We do not currently support typescript versions > 2.1. There were some issues that were introduced in 2.1 that broke the parser. These are all mostly fixed, with the exception of JSDoc comments. If you wish to use this parser with newer versions of typescript you can try the ts-2.1 branch.

Check here for more info:
#149

[zaggino]

The issue with that branch is similar, I cant use it with ts rc 2.2.0 because of peerDependency lock. Eslint works fine with 2.2.0 but it blocks shrinkwrap for no good reason.

[soda0289]

@zaggino You make a good point. I would like to see a ts-next or ts-rc branch that set the peer dependency to next or ^2.0.0 as you mentioned. The problem with setting the peer dependency version higher than the one we support is that the parser will crash if new features, like mapped types, are used.

Maybe we should remove peer dependency and have the parser check the globally installed version of typescript and warn the user.

[zaggino]

ts-next branch with a unrestricted peerDependency would be great 👍