forked from shama/webpack-stream
/
index.js
273 lines (239 loc) · 7.38 KB
/
index.js
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'use strict';
var fancyLog = require('fancy-log');
var PluginError = require('plugin-error');
var supportsColor = require('supports-color');
var File = require('vinyl');
var MemoryFileSystem = require('memory-fs');
var nodePath = require('path');
var through = require('through');
var ProgressPlugin = require('webpack/lib/ProgressPlugin');
var clone = require('lodash.clone');
var defaultStatsOptions = {
colors: supportsColor.stdout.hasBasic,
hash: false,
timings: false,
chunks: false,
chunkModules: false,
modules: false,
children: true,
version: true,
cached: false,
cachedAssets: false,
reasons: false,
source: false,
errorDetails: false
};
var cache = {};
module.exports = function (options, wp, done) {
if (cache.wp !== wp || cache.options !== options) {
cache = {};
}
cache.options = options;
cache.wp = wp;
options = clone(options) || {};
var config = options.config || options;
// Webpack 4 doesn't support the `quiet` attribute, however supports
// setting `stats` to a string within an array of configurations
// (errors-only|minimal|none|normal|verbose) or an object with an absurd
// amount of config
const isSilent = options.quiet || (typeof options.stats === 'string' && (options.stats.match(/^(errors-only|minimal|none)$/)));
if (typeof done !== 'function') {
var callingDone = false;
done = function (err, stats) {
if (err) {
// The err is here just to match the API but isnt used
return;
}
stats = stats || {};
if (isSilent || callingDone) {
return;
}
// Debounce output a little for when in watch mode
if (options.watch) {
callingDone = true;
setTimeout(function () {
callingDone = false;
}, 500);
}
if (options.verbose) {
fancyLog(stats.toString({
colors: supportsColor.stdout.hasBasic
}));
} else {
var statsOptions = (options && options.stats) || {};
if (typeof statsOptions === 'object') {
Object.keys(defaultStatsOptions).forEach(function (key) {
if (typeof statsOptions[key] === 'undefined') {
statsOptions[key] = defaultStatsOptions[key];
}
});
}
var statusLog = stats.toString(statsOptions);
if (statusLog) {
fancyLog(statusLog);
}
}
};
}
var webpack = wp || require('webpack');
var entry = [];
var entries = Object.create(null);
var stream = through(function (file) {
if (file.isNull()) {
return;
}
if ('named' in file) {
if (!Array.isArray(entries[file.named])) {
entries[file.named] = [];
}
entries[file.named].push(file.path);
} else {
entry = entry || [];
entry.push(file.path);
}
}, function () {
var self = this;
var handleConfig = function (config) {
config.output = config.output || {};
config.watch = !!options.watch;
// Determine pipe'd in entry
if (Object.keys(entries).length > 0) {
entry = entries;
if (!config.output.filename) {
// Better output default for multiple chunks
config.output.filename = '[name].js';
}
} else if (entry.length < 2) {
entry = entry[0] || entry;
}
config.entry = config.entry || entry;
config.output.path = config.output.path || process.cwd();
config.output.filename = config.output.filename || '[hash].js';
config.watch = options.watch;
entry = [];
if (!config.entry || config.entry.length < 1) {
fancyLog('webpack-stream - No files given; aborting compilation');
self.emit('end');
return false;
}
return true;
};
var succeeded;
if (Array.isArray(config)) {
for (var i = 0; i < config.length; i++) {
succeeded = handleConfig(config[i]);
if (!succeeded) {
return false;
}
}
} else {
succeeded = handleConfig(config);
if (!succeeded) {
return false;
}
}
// Cache compiler for future use
var compiler = cache.compiler || webpack(config);
cache.compiler = compiler;
const callback = function (err, stats) {
if (err) {
self.emit('error', new PluginError('webpack-stream', err));
return;
}
var jsonStats = stats ? stats.toJson() || {} : {};
var errors = jsonStats.errors || [];
if (errors.length) {
var errorMessage = errors.join('\n');
var compilationError = new PluginError('webpack-stream', errorMessage);
if (!options.watch) {
self.emit('error', compilationError);
}
self.emit('compilation-error', compilationError);
}
if (!options.watch) {
self.queue(null);
}
done(err, stats);
if (options.watch && !isSilent) {
fancyLog('webpack is watching for changes');
}
};
if (options.watch) {
const watchOptions = options.watchOptions || {};
compiler.watch(watchOptions, callback);
} else {
compiler.run(callback);
}
var handleCompiler = function (compiler) {
if (options.progress) {
(new ProgressPlugin(function (percentage, msg) {
percentage = Math.floor(percentage * 100);
msg = percentage + '% ' + msg;
if (percentage < 10) msg = ' ' + msg;
fancyLog('webpack', msg);
})).apply(compiler);
}
cache.mfs = cache.mfs || new MemoryFileSystem();
var fs = compiler.outputFileSystem = cache.mfs;
var afterEmitPlugin = compiler.hooks
// Webpack 4
? function (callback) { compiler.hooks.afterEmit.tapAsync('WebpackStream', callback); }
// Webpack 2/3
: function (callback) { compiler.plugin('after-emit', callback); };
afterEmitPlugin(function (compilation, callback) {
Object.keys(compilation.assets).forEach(function (outname) {
if (compilation.assets[outname].emitted) {
var file = prepareFile(fs, compiler, outname);
self.queue(file);
}
});
callback();
});
};
if (Array.isArray(options.config)) {
compiler.compilers.forEach(function (compiler) {
handleCompiler(compiler);
});
} else {
handleCompiler(compiler);
}
if (options.watch && !isSilent) {
const watchRunPlugin = compiler.hooks
// Webpack 4
? callback => compiler.hooks.watchRun.tapAsync('WebpackInfo', callback)
// Webpack 2/3
: callback => compiler.plugin('watch-run', callback);
watchRunPlugin((compilation, callback) => {
fancyLog('webpack compilation starting...');
callback();
});
}
});
// If entry point manually specified, trigger that
var hasEntry = Array.isArray(config)
? config.some(function (c) { return c.entry; })
: config.entry;
if (hasEntry) {
stream.end();
}
return stream;
};
function prepareFile (fs, compiler, outname) {
var path = fs.join(compiler.outputPath, outname);
if (path.indexOf('?') !== -1) {
path = path.split('?')[0];
}
var contents = fs.readFileSync(path);
var file = new File({
base: compiler.outputPath,
path: nodePath.join(compiler.outputPath, outname),
contents: contents
});
return file;
}
// Expose webpack if asked
Object.defineProperty(module.exports, 'webpack', {
get: function () {
return require('webpack');
}
});