next/dist/esm/lib/download-swc.js

The React Framework

import fs from 'fs';
import path from 'path';
import * as Log from '../build/output/log';
import tar from 'next/dist/compiled/tar';
const { WritableStream } = require('node:stream/web');
import { getRegistry } from './helpers/get-registry';
import { getCacheDirectory } from './helpers/get-cache-directory';
const MAX_VERSIONS_TO_CACHE = 8;
async function extractBinary(outputDirectory, pkgName, tarFileName) {
    const cacheDirectory = getCacheDirectory('next-swc', process.env['NEXT_SWC_PATH']);
    const extractFromTar = ()=>tar.x({
            file: path.join(cacheDirectory, tarFileName),
            cwd: outputDirectory,
            strip: 1
        });
    if (!fs.existsSync(path.join(cacheDirectory, tarFileName))) {
        Log.info(`Downloading swc package ${pkgName}... to ${cacheDirectory}`);
        await fs.promises.mkdir(cacheDirectory, {
            recursive: true
        });
        const tempFile = path.join(cacheDirectory, `${tarFileName}.temp-${Date.now()}`);
        const registry = getRegistry();
        const downloadUrl = `${registry}${pkgName}/-/${tarFileName}`;
        await fetch(downloadUrl).then((res)=>{
            const { ok, body } = res;
            if (!ok || !body) {
                Log.error(`Failed to download swc package from ${downloadUrl}`);
            }
            if (!ok) {
                throw Object.defineProperty(new Error(`request failed with status ${res.status}`), "__NEXT_ERROR_CODE", {
                    value: "E109",
                    enumerable: false,
                    configurable: true
                });
            }
            if (!body) {
                throw Object.defineProperty(new Error('request failed with empty body'), "__NEXT_ERROR_CODE", {
                    value: "E143",
                    enumerable: false,
                    configurable: true
                });
            }
            const cacheWriteStream = fs.createWriteStream(tempFile);
            return body.pipeTo(new WritableStream({
                write (chunk) {
                    return new Promise((resolve, reject)=>cacheWriteStream.write(chunk, (error)=>{
                            if (error) {
                                reject(error);
                                return;
                            }
                            resolve();
                        }));
                },
                close () {
                    return new Promise((resolve, reject)=>cacheWriteStream.close((error)=>{
                            if (error) {
                                reject(error);
                                return;
                            }
                            resolve();
                        }));
                }
            }));
        });
        await fs.promises.access(tempFile) // ensure the temp file existed
        ;
        await fs.promises.rename(tempFile, path.join(cacheDirectory, tarFileName));
    } else {
        Log.info(`Using cached swc package ${pkgName}...`);
    }
    await extractFromTar();
    const cacheFiles = await fs.promises.readdir(cacheDirectory);
    if (cacheFiles.length > MAX_VERSIONS_TO_CACHE) {
        cacheFiles.sort((a, b)=>{
            if (a.length < b.length) return -1;
            return a.localeCompare(b);
        });
        // prune oldest versions in cache
        for(let i = 0; i++; i < cacheFiles.length - MAX_VERSIONS_TO_CACHE){
            await fs.promises.unlink(path.join(cacheDirectory, cacheFiles[i])).catch(()=>{});
        }
    }
}
export async function downloadNativeNextSwc(version, bindingsDirectory, triplesABI) {
    for (const triple of triplesABI){
        const pkgName = `@next/swc-${triple}`;
        const tarFileName = `${pkgName.substring(6)}-${version}.tgz`;
        const outputDirectory = path.join(bindingsDirectory, pkgName);
        if (fs.existsSync(outputDirectory)) {
            // if the package is already downloaded a different
            // failure occurred than not being present
            return;
        }
        await fs.promises.mkdir(outputDirectory, {
            recursive: true
        });
        await extractBinary(outputDirectory, pkgName, tarFileName);
    }
}
export async function downloadWasmSwc(version, wasmDirectory, variant = 'nodejs') {
    const pkgName = `@next/swc-wasm-${variant}`;
    const tarFileName = `${pkgName.substring(6)}-${version}.tgz`;
    const outputDirectory = path.join(wasmDirectory, pkgName);
    if (fs.existsSync(outputDirectory)) {
        // if the package is already downloaded a different
        // failure occurred than not being present
        return;
    }
    await fs.promises.mkdir(outputDirectory, {
        recursive: true
    });
    await extractBinary(outputDirectory, pkgName, tarFileName);
}

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