Project not specified to tslint

[pelotom]

When you first start a freshly-scaffolded app, the following warning flashes:

Warning: The 'no-use-before-declare' rule requires type infomation.

This is because --project is not being specified to tslint. It has the implication that any rules that require type information are disabled. In the ejected app's webpack config, adding

options: {
  typeCheck: true,
  tsConfigFile: paths.appTsConfig,
}

to the ts-loader config fixes it.

[wmonk]

I will accept a PR for this.

[carlpaten]

I would be interested in implementing this PR, but I don't know where the added options go. (I imagine in packages/react-scripts/config/webpack.config.*.js?)

If @pelotom could elaborate I will definitely open a PR.

[pelotom]

I've since discovered that tslint-loader has serious performance problems when in type checking mode. Because of this I've stopped using tslint-loader and opted instead for tslint-webpack-plugin.

[DorianGrey]

Should no longer be a problem due to the inclusion of fork-ts-checker-webpack-plugin, which provides the required ts.Program instance tslint's type-checking.
Note that this is currently only on master, not released.