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cache.js
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cache.js
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import path from "path";
import fs from "fs";
import { sync as mkdirpSync } from "mkdirp";
import homeOrTmp from "home-or-tmp";
const FILENAME = process.env.BABEL_CACHE_PATH || path.join(homeOrTmp, ".babel.json");
let data = {};
/**
* Write stringified cache to disk.
*/
export function save() {
let serialised = {};
try {
serialised = JSON.stringify(data, null, " ");
} catch (err) {
if (err.message === "Invalid string length") {
err.message = "Cache too large so it's been cleared.";
console.error(err.stack);
} else {
throw err;
}
}
mkdirpSync(path.dirname(FILENAME));
fs.writeFileSync(FILENAME, serialised);
}
/**
* Load cache from disk and parse.
*/
export function load() {
if (process.env.BABEL_DISABLE_CACHE) return;
process.on("exit", save);
process.nextTick(save);
if (!fs.existsSync(FILENAME)) return;
try {
data = JSON.parse(fs.readFileSync(FILENAME));
} catch (err) {
return;
}
}
/**
* Retrieve data from cache.
*/
export function get() {
return data;
}