ref(nextjs): Add warning about non-hidden sourcemaps #5649
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This was referenced Aug 30, 2022
lforst
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…5464) This expands the explanation of the `hideSourceMaps` option in `next.config.js`, and notes that it will default to `true` starting in version 8 of the SDK. In conjunction with getsentry/sentry-javascript#5649, getsentry/sentry-wizard#188, and vercel/next.js#40079, this is the first step in addressing the concerns raised in getsentry/sentry-javascript#4489. See getsentry/sentry-javascript#4489 (comment) for more details.
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This adds a default value for `hideSourceMaps` to the `next.config.js` the wizard provides, so that new users will use `hidden-source-map` as their Webpack `devtool` by default in client-side builds. (This prevents browser devtools from seeing sourcemaps and therefore prevents original source code from showing up automatically in the `Sources` tab. (More information on `devtool` values can be found at https://webpack.js.org/configuration/devtool/.) In conjunction with getsentry/sentry-javascript#5649, getsentry/sentry-docs#5464, and vercel/next.js#40079, this is the first step in addressing the concerns raised in getsentry/sentry-javascript#4489. See getsentry/sentry-javascript#4489 (comment) for more details.
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This adds a default value for `hideSourceMaps` to the `next.config.js` the `with-sentry` example app provides, so that new users will use `hidden-source-map` as their Webpack `devtool` by default in client-side builds. (This prevents browser devtools from seeing sourcemaps and therefore prevents original source code from showing up automatically in the `Sources` tab. (More information on `devtool` values can be found [here](https://webpack.js.org/configuration/devtool/).) In conjunction with getsentry/sentry-javascript#5649, getsentry/sentry-wizard#188, and getsentry/sentry-docs#5464, this is the first step in addressing the concerns raised in getsentry/sentry-javascript#4489. See [here](getsentry/sentry-javascript#4489 (comment)) for more details.
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This adds a warning during nextjs app build (both in prod and dev) letting folks know that by default (for now), the sourcemaps we create can be seen by browser devtools.
In conjunction with getsentry/sentry-wizard#188, getsentry/sentry-docs#5464, and vercel/next.js#40079, this is the first step in addressing the concerns raised in #4489. See here for more details.
Notes:
The function doing the warning includes both the current warning and one for use in v8 and beyond (currently commented out), telling people they no longer need to set
hideSourceMapstotrue(because by that point it will be the default).The formatting of the warning matches the formatting of other nextjs warnings. Because nextjs vendors
chalkthemselves, that meant we needed to add it as a dependency. Though the latest version ofchalkis 5.x, here we're using 3.x because it's the last to be compatible with node 8. (See below for a screenshot.)There are
TODOs reflecting the changes which need to be made in v8 (change the default totrue, switch the warning message) and v9 or v10 (get rid of the second warning once it's had plenty of time to do its job).Screenshot of warning: