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Fix crash; fs event received /w langauge file empty

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It was common, at least for me, to experience a crash produced
when running the `matrix-react-sdk/scripts/gen-i18n.js` script
because when writing en_EN.json (via the script or otherwise)
choikdar would receive an event and cause the file to be read,
but the file would be empty when clearly it wasn't.

This would happen even when doing an atomic write in gen-i18n.

The fix adds a debounce as a workaround.
This commit is contained in:
Luke Barnard 2018-03-02 15:30:06 +00:00
parent e1e8d9777b
commit 075f568f61
1 changed files with 15 additions and 4 deletions
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19
scripts/copy-res.js
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@ -134,8 +134,19 @@ function next(i, err) {
const reactSdkFile = 'node_modules/matrix-react-sdk/src/i18n/strings/' + source + '.json';
const riotWebFile = 'src/i18n/strings/' + source + '.json';
const translations = {};
const makeLang = () => { genLangFile(source, dest) };
// XXX: Use a debounce because for some reason if we read the language
// file immediately after the FS event is received, the file contents
// appears empty. Possibly https://github.com/nodejs/node/issues/6112
let makeLangDebouncer;
const makeLang = () => {
if (makeLangDebouncer) {
clearTimeout(makeLangDebouncer);
}
makeLangDebouncer = setTimeout(() => {
genLangFile(source, dest);
}, 500);
};
[reactSdkFile, riotWebFile].forEach(function(f) {
chokidar.watch(f)
.on('add', makeLang)
@ -170,13 +181,13 @@ function genLangFile(lang, dest) {
JSON.parse(fs.readFileSync(f).toString())
);
} catch (e) {
console.error("Failed: "+f, e);
console.error("Failed: " + f, e);
throw e;
}
}
});
translations = weblateToCounterpart(translations)
translations = weblateToCounterpart(translations);
fs.writeFileSync(dest + lang + '.json', JSON.stringify(translations, null, 4));
if (verbose) {