display better error messages about tslint-loader HOT 4 OPEN

Problems occur with webpack 4 together with gulp/webpack-stream. In this case the fileName is omitted completely leaving:

[3, 17]: Type boolean trivially inferred from a boolean literal, remove type annotation

while e.g ts-loader displays:

 [tsl] ERROR in path/to.ts(35,5)
      TS2531: Object is possibly 'null'.

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@almondtools any workaround? I'm experiencing the same issue. Super frustrating when enabling tslint on an existing codebase. Could take a long time to hunt down these errors.

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I tried to fix this issue in a fork, yet this lets every unit test fail. So this would have meant a complete API change and I think it should be confirmed by the project owner.

However I found out that a custom formatter has access to more information. Look at the file customFormatter.js and prepend failure.fileName to positionTuple. To include a custom formatter you have to configure the formatter directory and the name of the new formatter.

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Took some trial-and-error to get it right.

Options:

{
    formatter: 'michael',
    formattersDirectory: 'tslint-formatters'
}

I created the file tslint-formatters/michaelFormatter.js and copied/pasted the contents of customFormatter.js linked above. I made the one tweak @almondtools mentioned. No need to change the Formatter name in the file.

Thanks for the help!

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