124 lines
3.5 KiB
JavaScript
124 lines
3.5 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const path = require('path');
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const MemoryFileSystem = require('memory-fs');
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const { colors } = require('webpack-log');
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const NodeOutputFileSystem = require('webpack/lib/node/NodeOutputFileSystem');
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const DevMiddlewareError = require('./DevMiddlewareError');
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const { mkdirp } = new NodeOutputFileSystem();
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module.exports = {
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toDisk(context) {
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const compilers = context.compiler.compilers || [context.compiler];
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for (const compiler of compilers) {
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compiler.hooks.afterEmit.tap('WebpackDevMiddleware', (compilation) => {
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const { assets } = compilation;
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const { log } = context;
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const { writeToDisk: filter } = context.options;
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let { outputPath } = compiler;
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if (outputPath === '/') {
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outputPath = compiler.context;
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}
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for (const assetPath of Object.keys(assets)) {
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let targetFile = assetPath;
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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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const targetPath = path.isAbsolute(targetFile)
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? targetFile
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: path.join(outputPath, targetFile);
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const allowWrite =
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filter && typeof filter === 'function' ? filter(targetPath) : true;
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if (allowWrite) {
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const asset = assets[assetPath];
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let content = asset.source();
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if (!Buffer.isBuffer(content)) {
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// TODO need remove in next major release
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if (Array.isArray(content)) {
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content = content.join('\n');
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}
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content = Buffer.from(content, 'utf8');
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}
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mkdirp.sync(path.dirname(targetPath));
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try {
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fs.writeFileSync(targetPath, content, 'utf-8');
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log.debug(
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colors.cyan(
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`Asset written to disk: ${path.relative(
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process.cwd(),
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targetPath
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)}`
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)
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);
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} catch (e) {
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log.error(`Unable to write asset to disk:\n${e}`);
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}
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}
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}
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});
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}
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},
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setFs(context, compiler) {
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if (
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typeof compiler.outputPath === 'string' &&
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!path.posix.isAbsolute(compiler.outputPath) &&
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!path.win32.isAbsolute(compiler.outputPath)
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) {
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throw new DevMiddlewareError(
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'`output.path` needs to be an absolute path or `/`.'
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);
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}
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let fileSystem;
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// store our files in memory
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const isConfiguredFs = context.options.fs;
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const isMemoryFs =
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!isConfiguredFs &&
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!compiler.compilers &&
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compiler.outputFileSystem instanceof MemoryFileSystem;
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if (isConfiguredFs) {
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// eslint-disable-next-line no-shadow
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const { fs } = context.options;
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if (typeof fs.join !== 'function') {
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// very shallow check
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throw new Error(
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'Invalid options: options.fs.join() method is expected'
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);
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}
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// eslint-disable-next-line no-param-reassign
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compiler.outputFileSystem = fs;
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fileSystem = fs;
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} else if (isMemoryFs) {
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fileSystem = compiler.outputFileSystem;
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} else {
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fileSystem = new MemoryFileSystem();
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// eslint-disable-next-line no-param-reassign
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compiler.outputFileSystem = fileSystem;
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}
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// eslint-disable-next-line no-param-reassign
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context.fs = fileSystem;
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},
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};
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