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111 lines
2.9 KiB
111 lines
2.9 KiB
3 years ago
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"use strict";
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const fs = require("fs");
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const path = require("path");
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/** @typedef {import("webpack").Compiler} Compiler */
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/** @typedef {import("webpack").MultiCompiler} MultiCompiler */
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/** @typedef {import("webpack").Compilation} Compilation */
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/** @typedef {import("../index.js").IncomingMessage} IncomingMessage */
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/** @typedef {import("../index.js").ServerResponse} ServerResponse */
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/**
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* @template {IncomingMessage} Request
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* @template {ServerResponse} Response
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* @param {import("../index.js").Context<Request, Response>} context
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*/
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function setupWriteToDisk(context) {
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/**
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* @type {Compiler[]}
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*/
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const compilers =
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/** @type {MultiCompiler} */
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context.compiler.compilers || [context.compiler];
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for (const compiler of compilers) {
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compiler.hooks.emit.tap("DevMiddleware",
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/**
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* @param {Compilation} compilation
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*/
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compilation => {
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// @ts-ignore
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if (compiler.hasWebpackDevMiddlewareAssetEmittedCallback) {
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return;
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}
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compiler.hooks.assetEmitted.tapAsync("DevMiddleware", (file, info, callback) => {
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/**
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* @type {string}
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*/
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let targetPath;
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/**
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* @type {Buffer}
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*/
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let content; // webpack@5
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if (info.compilation) {
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({
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targetPath,
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content
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} = info);
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} else {
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let targetFile = file;
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const queryStringIdx = targetFile.indexOf("?");
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if (queryStringIdx >= 0) {
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targetFile = targetFile.substr(0, queryStringIdx);
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}
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let {
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outputPath
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} = compiler;
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outputPath = compilation.getPath(outputPath, {}); // @ts-ignore
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content = info;
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targetPath = path.join(outputPath, targetFile);
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}
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const {
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writeToDisk: filter
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} = context.options;
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const allowWrite = filter && typeof filter === "function" ? filter(targetPath) : true;
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if (!allowWrite) {
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return callback();
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}
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const dir = path.dirname(targetPath);
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const name = compiler.options.name ? `Child "${compiler.options.name}": ` : "";
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return fs.mkdir(dir, {
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recursive: true
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}, mkdirError => {
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if (mkdirError) {
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context.logger.error(`${name}Unable to write "${dir}" directory to disk:\n${mkdirError}`);
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return callback(mkdirError);
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}
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return fs.writeFile(targetPath, content, writeFileError => {
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if (writeFileError) {
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context.logger.error(`${name}Unable to write "${targetPath}" asset to disk:\n${writeFileError}`);
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return callback(writeFileError);
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}
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context.logger.log(`${name}Asset written to disk: "${targetPath}"`);
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return callback();
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});
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});
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}); // @ts-ignore
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compiler.hasWebpackDevMiddlewareAssetEmittedCallback = true;
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});
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}
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}
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module.exports = setupWriteToDisk;
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