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Merge pull request #5753 from matrix-org/jryans/fsync-reskindex

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Use fsync in reskindex to ensure file is written to disk
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J. Ryan Stinnett 2021-03-11 14:19:04 +00:00 committed by GitHub
commit b61fd1da64
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1 changed files with 15 additions and 9 deletions
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24
scripts/reskindex.js
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@ -1,5 +1,6 @@
#!/usr/bin/env node
const fs = require('fs');
const { promises: fsp } = fs;
const path = require('path');
const glob = require('glob');
const util = require('util');
@ -25,6 +26,8 @@ async function reskindex() {
const header = args.h || args.header;
const strm = fs.createWriteStream(componentIndexTmp);
// Wait for the open event to ensure the file descriptor is set
await new Promise(resolve => strm.once("open", resolve));
if (header) {
strm.write(fs.readFileSync(header));
@ -53,14 +56,9 @@ async function reskindex() {
strm.write("export {components};\n");
// Ensure the file has been fully written to disk before proceeding
await util.promisify(fs.fsync)(strm.fd);
await util.promisify(strm.end);
fs.rename(componentIndexTmp, componentIndex, function(err) {
if (err) {
console.error("Error moving new index into place: " + err);
} else {
console.log('Reskindex: completed');
}
});
await fsp.rename(componentIndexTmp, componentIndex);
}
// Expects both arrays of file names to be sorted
@ -77,9 +75,17 @@ function filesHaveChanged(files, prevFiles) {
return false;
}
// Wrapper since await at the top level is not well supported yet
function run() {
(async function() {
await reskindex();
console.log("Reskindex completed");
})();
}
// -w indicates watch mode where any FS events will trigger reskindex
if (!args.w) {
reskindex();
run();
return;
}
@ -87,5 +93,5 @@ let watchDebouncer = null;
chokidar.watch(path.join(componentsDir, componentJsGlob)).on('all', (event, path) => {
if (path === componentIndex) return;
if (watchDebouncer) clearTimeout(watchDebouncer);
watchDebouncer = setTimeout(reskindex, 1000);
watchDebouncer = setTimeout(run, 1000);
});