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Meteor's build only includes npm packages it sees imported/required somewhere in its own traced module graph. private/workers/unionWorker.js is a plain asset (loaded at runtime via new Worker(), never import/require'd from Meteor-compiled code), so @turf/circle, @turf/union and @turf/truncate got silently dropped from programs/server/node_modules — the worker crashed on every call with "Cannot find module '@turf/circle'", which incrementalAdd/process swallowed and stored as a "null" union (typeof null === 'object', so the null-check that guards against failed unions doesn't catch it). Side-effect imports here force Meteor to bundle them.
39 lines
1.5 KiB
JavaScript
39 lines
1.5 KiB
JavaScript
import path from 'path';
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import { Worker } from 'worker_threads';
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// Meteor only bundles the npm packages it sees imported/required somewhere in
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// its own compiled module graph. The actual usage of these three is inside
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// private/workers/unionWorker.js, a plain asset file Meteor's bundler never
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// traces (it's loaded at runtime via new Worker(), not import/require here).
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// Without this, `meteor build` drops them from programs/server/node_modules
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// and the worker fails at startup with "Cannot find module '@turf/circle'".
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import '@turf/circle';
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import '@turf/union';
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import '@turf/truncate';
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const WORKER_PATH = path.resolve(process.cwd(), 'assets/app/workers/unionWorker.js');
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/**
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* Circle-union of already-validated, already-decorated subscriptions, run in a
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* worker thread so the main event loop (DDP/HTTP) stays free regardless of
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* how long any single turf.union call takes. subs must be an array of plain
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* { location: { lat, lon }, distance } objects. If baseUnion is given, subs
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* are merged into it instead of a union computed from scratch.
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*/
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const calcUnionAsync = (subs, baseUnion = null) => new Promise((resolve, reject) => {
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const worker = new Worker(WORKER_PATH, { workerData: { subs, baseUnion } });
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worker.once('message', (msg) => {
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worker.terminate();
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if (msg.error) {
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reject(new Error(msg.error));
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} else {
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resolve(msg.union);
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}
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});
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worker.once('error', (err) => {
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worker.terminate();
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reject(err);
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});
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});
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export default calcUnionAsync;
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