487f10f84d
* fix: disable caching when babel could not read/write cache * emit warning when cache folder resides in readonly fs * fix: always register save handler * cache: maintain old behaviour * test: add more test case * fix: next tick tasks are FIFO * test: disable test on Windows
120 lines
2.6 KiB
JavaScript
120 lines
2.6 KiB
JavaScript
import path from "path";
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import fs from "fs";
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import os from "os";
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import { sync as mkdirpSync } from "mkdirp";
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import * as babel from "@babel/core";
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import findCacheDir from "find-cache-dir";
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const DEFAULT_CACHE_DIR =
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findCacheDir({ name: "@babel/register" }) || os.homedir() || os.tmpdir();
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const DEFAULT_FILENAME = path.join(
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DEFAULT_CACHE_DIR,
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`.babel.${babel.version}.${babel.getEnv()}.json`,
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);
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const FILENAME: string = process.env.BABEL_CACHE_PATH || DEFAULT_FILENAME;
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let data: Object = {};
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let cacheDisabled = false;
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function isCacheDisabled() {
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return process.env.BABEL_DISABLE_CACHE ?? cacheDisabled;
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}
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/**
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* Write stringified cache to disk.
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*/
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export function save() {
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if (isCacheDisabled()) return;
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let serialised: string = "{}";
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try {
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serialised = JSON.stringify(data, null, " ");
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} catch (err) {
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if (err.message === "Invalid string length") {
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err.message = "Cache too large so it's been cleared.";
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console.error(err.stack);
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} else {
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throw err;
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}
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}
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try {
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mkdirpSync(path.dirname(FILENAME));
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fs.writeFileSync(FILENAME, serialised);
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} catch (e) {
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switch (e.code) {
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case "EACCES":
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case "EPERM":
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console.warn(
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`Babel could not write cache to file: ${FILENAME}
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due to a permission issue. Cache is disabled.`,
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);
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cacheDisabled = true;
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break;
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case "EROFS":
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console.warn(
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`Babel could not write cache to file: ${FILENAME}
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because it resides in a readonly filesystem. Cache is disabled.`,
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);
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cacheDisabled = true;
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break;
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default:
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throw e;
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}
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}
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}
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/**
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* Load cache from disk and parse.
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*/
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export function load() {
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if (isCacheDisabled()) {
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data = {};
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return;
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}
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process.on("exit", save);
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process.nextTick(save);
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let cacheContent;
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try {
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cacheContent = fs.readFileSync(FILENAME);
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} catch (e) {
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switch (e.code) {
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// check EACCES only as fs.readFileSync will never throw EPERM on Windows
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// https://github.com/libuv/libuv/blob/076df64dbbda4320f93375913a728efc40e12d37/src/win/fs.c#L735
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case "EACCES":
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console.warn(
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`Babel could not read cache file: ${FILENAME}
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due to a permission issue. Cache is disabled.`,
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);
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cacheDisabled = true;
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/* fall through */
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default:
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return;
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}
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}
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try {
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data = JSON.parse(cacheContent);
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} catch {}
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}
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/**
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* Retrieve data from cache.
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*/
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export function get(): Object {
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return data;
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}
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/**
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* Clear the cache object.
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*/
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export function clear() {
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data = {};
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}
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