@farmfe/core/dist/utils/publicDir.js

Farm is a extremely fast web build tool written in Rust. Farm can start a project in milliseconds and perform HMR within 10ms, making it much faster than similar tools like webpack and vite.

import fs from 'fs';
import path from 'path';
import { ERR_SYMLINK_IN_RECURSIVE_READDIR, recursiveReaddir } from './file.js';
import { withTrailingSlash } from './path.js';
import { normalizePath } from './share.js';
import { cleanUrl } from './url.js';
const publicFilesMap = new WeakMap();
export async function checkPublicFile(url, config) {
    // note if the file is in /public, the resolver would have returned it
    // as-is so it's not going to be a fully resolved path.
    const { publicDir } = config;
    if (!publicDir || url[0] !== '/') {
        return;
    }
    await initPublicFiles(config);
    const fileName = cleanUrl(url);
    const publicFiles = getPublicFiles(config);
    if (publicFiles) {
        return publicFiles.has(fileName)
            ? normalizePath(path.join(publicDir, fileName))
            : undefined;
    }
    const publicFile = normalizePath(path.join(publicDir, fileName));
    if (!publicFile.startsWith(withTrailingSlash(publicDir))) {
        // can happen if URL starts with '../'
        return;
    }
    return fs.existsSync(publicFile) ? publicFile : undefined;
}
export async function initPublicFiles(config) {
    let fileNames;
    try {
        fileNames = await recursiveReaddir(config.publicDir);
    }
    catch (e) {
        if (e.code === ERR_SYMLINK_IN_RECURSIVE_READDIR) {
            return;
        }
        throw e;
    }
    const publicFiles = new Set(fileNames.map((fileName) => fileName.slice(config.publicDir.length)));
    publicFilesMap.set(config, publicFiles);
    return publicFiles;
}
function getPublicFiles(config) {
    return publicFilesMap.get(config);
}
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