48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
import fsOrig, { promises as fs } from "fs";
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import path from "path";
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import debounce from "debounce";
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import { getLangs, readLangConfig } from "../lib/yaml.js";
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import { log } from "./util.js";
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// Map from language IDs to language configuration objects. This is
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// populated at runtime and updated asynchronously.
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export let langs = {};
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// Map from language aliases and IDs to canonical language IDs.
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export let aliases = {};
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// Read languages from YAML, and update the global langs variable in
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// this module. Never throw an error. If there is a problem then just
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// leave the languages as they previously were.
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async function updateLangsFromDisk() {
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try {
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const newLangs = {};
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const newAliases = {};
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for (const langConfig of await Promise.all(
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(await getLangs()).map(readLangConfig)
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)) {
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const { id } = langConfig;
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newLangs[id] = langConfig;
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newAliases[id] = id;
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for (const alias of langConfig.aliases || []) {
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newAliases[alias] = id;
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}
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}
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log.info(
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`Loaded ${
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Object.keys(newLangs).length
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} language configuration(s) from disk`
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);
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langs = newLangs;
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aliases = newAliases;
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} catch (err) {
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log.error("Failed to read languages from disk:", err);
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}
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}
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export const langsPromise = updateLangsFromDisk().then(() => langs);
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export const langWatcher = fsOrig.watch("langs", debounce(updateLangsFromDisk, 200));
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