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esm: update loaders warning #49633

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Merged
nodejs-github-bot merged 7 commits into from
Sep 19, 2023
Merged

esm: update loaders warning #49633

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f471450
esm: update loaders warning
GeoffreyBooth Sep 13, 2023
69371c9
Change warning to be specific to --experimental-loader
GeoffreyBooth Sep 13, 2023
cf082a9
Update test/es-module/test-esm-experimental-warnings.mjs
GeoffreyBooth Sep 14, 2023
42077e5
Update test/es-module/test-esm-experimental-warnings.mjs
GeoffreyBooth Sep 14, 2023
edc985e
Improve warning
GeoffreyBooth Sep 14, 2023
27c14d7
lint
GeoffreyBooth Sep 14, 2023
45d517d
`readableURIEncode`
aduh95 Sep 16, 2023
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Change warning to be specific to --experimental-loader
  • Loading branch information
@GeoffreyBooth @aduh95
GeoffreyBooth authored and aduh95 committed Sep 16, 2023
commit 69371c996241138f21c8a793ae62bd9966cc0cec
8 changes: 8 additions & 0 deletions lib/internal/modules/esm/loader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -499,6 +499,7 @@ class CustomizedModuleLoader {
}
}

let emittedLoaderFlagWarning = false;
/**
* A loader instance is used as the main entry point for loading ES modules. Currently, this is a singleton; there is
* only one used for loading the main module and everything in its dependency graph, though separate instances of this
Expand All @@ -514,6 +515,13 @@ function createModuleLoader(useCustomLoadersIfPresent = true) {
!require('internal/modules/esm/utils').isLoaderWorker()) {
const userLoaderPaths = getOptionValue('--experimental-loader');
if (userLoaderPaths.length > 0) {
if (!emittedLoaderFlagWarning) {
process.emitWarning(
'`--experimental-loader` may be removed in the future; instead use `--import` to reference a file that calls `register()`',
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'ExperimentalWarning',
);
emittedLoaderFlagWarning = true;
}
customizations = new CustomizedModuleLoader();
}
}
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4 changes: 4 additions & 0 deletions test/es-module/test-esm-experimental-warnings.mjs
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Expand Up @@ -25,6 +25,10 @@ describe('ESM: warn for obsolete hooks provided', { concurrency: true }, () => {
describe('experimental warnings for enabled experimental feature', () => {
for (
const [experiment, arg] of [
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[
/`--experimental-loader` may be removed in the future/,
`--experimental-loader=${fileurl("https://github.com/nodejs/node/pull/49633/commits/'es-module-loaders',%20'hooks-custom.mjs'")}`
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],
[/Network Imports/, '--experimental-network-imports'],
]
) {
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