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59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
var _ = require('lodash')
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/**
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* Create a new StatsPlugin that causes webpack to generate a stats file as
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* part of the emitted assets.
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* @constructor
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* @param {String} output Path to output file.
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* @param {Object} options Options passed to the stats' `.toJson()`.
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*/
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function StatsPlugin (output, options, cache) {
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this.output = output
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this.options = options
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this.cache = cache
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}
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function onEmit (output, options, cache) {
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return function (compilation, done) {
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var result
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compilation.assets[output] = {
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size: function getSize () {
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return result ? result.length : 0
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},
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source: function getSource () {
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var stats = compilation.getStats().toJson(options)
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var result
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if (cache) {
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cache = _.merge(cache, stats)
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if (stats.errors) cache.errors = stats.errors
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if (stats.warnings) cache.warnings = stats.warnings
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result = JSON.stringify(cache)
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} else {
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result = JSON.stringify(stats)
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}
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return result
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}
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}
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done()
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}
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}
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StatsPlugin.prototype.apply = function apply (compiler) {
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var output = this.output
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var options = this.options
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var cache = this.cache
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var onEmitCallback = onEmit(output, options, cache)
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if (compiler.hooks) {
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compiler.hooks.emit.tapAsync('StatsPlugin', onEmitCallback)
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} else {
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compiler.plugin('emit', onEmitCallback)
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}
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}
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module.exports = StatsPlugin
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