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fix(gatsby): Pass reporter from functions code for reporting warning #31336

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May 11, 2021
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Original file line number Diff line number Diff line change
Expand Up @@ -220,7 +220,7 @@ export async function onPreBootstrap({
function callback(err, stats): any {
const rawMessages = stats.toJson({ moduleTrace: false })
if (rawMessages.warnings.length > 0) {
reporter.warn(reportWebpackWarnings(rawMessages.warnings))
reportWebpackWarnings(rawMessages.warnings, reporter)
}

if (err) return reject(err)
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4 changes: 3 additions & 1 deletion packages/gatsby/src/utils/webpack-error-utils.ts
Original file line number Diff line number Diff line change
Expand Up @@ -148,7 +148,9 @@ export const reportWebpackWarnings = (
warnings: StatsCompilation["warnings"] = [],
reporter: Reporter
): void => {
const warningMessages = warnings.map(warning => warning.message)
const warningMessages = warnings.map(
warning => `${warning.moduleName}\n\n${warning.message}`
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make the warning a lot more useful — say which file it's from.

Thinking we don't need formatWebpackMessages any more w/ webpack 5? We just pass it a string which it now returns... 🤷

Warnings look like this now:
Screen Shot 2021-05-07 at 4 37 32 PM

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formatWebpackMessages does more than formatting. It also rewrites errors to a more actionable ones.

https://github.com/facebook/create-react-app/blob/master/packages/react-dev-utils/formatWebpackMessages.js

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The stats warnings/error object changed in v5 — see #30801 & facebook/create-react-app#9943

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but yeah, to your point, the message rewritings should still apply so we still want it

)

formatWebpackMessages({
errors: [],
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