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bootstrap: improve snapshot unsupported builtin warnings #50944

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merged 2 commits into from
Dec 10, 2023
Merged

bootstrap: improve snapshot unsupported builtin warnings #50944

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bootstrap: improve snapshot unsupported builtin warnings
joyeecheung Nov 27, 2023
3650426
fixup! bootstrap: improve snapshot unsupported builtin warnings
joyeecheung Dec 3, 2023
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17 changes: 13 additions & 4 deletions lib/internal/main/mksnapshot.js
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@ const {
const { isExperimentalSeaWarningNeeded } = internalBinding('sea');

const { emitExperimentalWarning } = require('internal/util');

const { emitWarningSync } = require('internal/process/warning');
const {
getOptionValue,
} = require('internal/options');
Expand All @@ -29,6 +29,7 @@ const {
namespace: {
addSerializeCallback,
addDeserializeCallback,
isBuildingSnapshot,
},
} = require('internal/v8/startup_snapshot');

Expand Down Expand Up @@ -119,10 +120,18 @@ function requireForUserSnapshot(id) {
err.code = 'MODULE_NOT_FOUND';
throw err;
}
if (!supportedInUserSnapshot(normalizedId)) {
if (isBuildingSnapshot() && !supportedInUserSnapshot(normalizedId)) {
if (!warnedModules.has(normalizedId)) {
process.emitWarning(
`built-in module ${id} is not yet supported in user snapshots`);
// Emit the warning synchronously in case we don't get to process
// the tick and print it before the unsupported built-in causes a
// crash.
emitWarningSync(
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`It's not yet fully verified whether built-in module "${id}" ` +
'works in user snapshot builder scripts.\n' +
'It may still work in some cases, but in other cases certain ' +
'run-time states may be out-of-sync after snapshot deserialization.\n' +
'To request support for the module, use the Node.js issue tracker: ' +
'https://github.com/nodejs/node/issues');
warnedModules.add(normalizedId);
}
}
Expand Down