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| var RawSource = require('webpack-sources/lib/RawSource');
var evaluate = require('eval');
var path = require('path');
var cheerio = require('cheerio');
var url = require('url');
var Promise = require('bluebird');
function StaticSiteGeneratorWebpackPlugin(options) {
if (arguments.length > 1) {
options = legacyArgsToOptions.apply(null, arguments);
}
options = options || {};
this.entry = options.entry;
this.paths = Array.isArray(options.paths) ? options.paths : [options.paths || '/'];
this.locals = options.locals;
this.globals = options.globals;
this.crawl = Boolean(options.crawl);
}
StaticSiteGeneratorWebpackPlugin.prototype.apply = function(compiler) {
var self = this;
addThisCompilationHandler(compiler, function(compilation) {
addOptimizeAssetsHandler(compilation, function(_, done) {
var renderPromises;
var webpackStats = compilation.getStats();
var webpackStatsJson = webpackStats.toJson();
try {
var asset = findAsset(self.entry, compilation, webpackStatsJson);
if (asset == null) {
throw new Error('Source file not found: "' + self.entry + '"');
}
var assets = getAssetsFromCompilation(compilation, webpackStatsJson);
var source = asset.source();
var render = evaluate(source, /* filename: */ self.entry, /* scope: */ self.globals, /* includeGlobals: */ true);
if (render.hasOwnProperty('default')) {
render = render['default'];
}
if (typeof render !== 'function') {
throw new Error('Export from "' + self.entry + '" must be a function that returns an HTML string. Is output.libraryTarget in the configuration set to "umd"?');
}
renderPaths(self.crawl, self.locals, self.paths, render, assets, webpackStats, compilation)
.nodeify(done);
} catch (err) {
compilation.errors.push(err.stack);
done();
}
});
});
};
function renderPaths(crawl, userLocals, paths, render, assets, webpackStats, compilation) {
var renderPromises = paths.map(function(outputPath) {
var locals = {
path: outputPath,
assets: assets,
webpackStats: webpackStats
};
for (var prop in userLocals) {
if (userLocals.hasOwnProperty(prop)) {
locals[prop] = userLocals[prop];
}
}
var renderPromise = render.length < 2 ?
Promise.resolve(render(locals)) :
Promise.fromNode(render.bind(null, locals));
return renderPromise
.then(function(output) {
var outputByPath = typeof output === 'object' ? output : makeObject(outputPath, output);
var assetGenerationPromises = Object.keys(outputByPath).map(function(key) {
var rawSource = outputByPath[key];
var assetName = pathToAssetName(key);
if (compilation.assets[assetName]) {
return;
}
compilation.assets[assetName] = new RawSource(rawSource);
if (crawl) {
var relativePaths = relativePathsFromHtml({
source: rawSource,
path: key
});
return renderPaths(crawl, userLocals, relativePaths, render, assets, webpackStats, compilation);
}
});
return Promise.all(assetGenerationPromises);
})
.catch(function(err) {
compilation.errors.push(err.stack);
});
});
return Promise.all(renderPromises);
}
var findAsset = function(src, compilation, webpackStatsJson) {
if (!src) {
var chunkNames = Object.keys(webpackStatsJson.assetsByChunkName);
src = chunkNames[0];
}
var asset = compilation.assets[src];
if (asset) {
return asset;
}
var chunkValue = webpackStatsJson.assetsByChunkName[src];
if (!chunkValue) {
return null;
}
// Webpack outputs an array for each chunk when using sourcemaps
if (chunkValue instanceof Array) {
// Is the main bundle always the first element?
chunkValue = chunkValue.find(function(filename) {
return /\.js$/.test(filename);
});
}
return compilation.assets[chunkValue];
};
// Shamelessly stolen from html-webpack-plugin - Thanks @ampedandwired :)
var getAssetsFromCompilation = function(compilation, webpackStatsJson) {
var assets = {};
for (var chunk in webpackStatsJson.assetsByChunkName) {
var chunkValue = webpackStatsJson.assetsByChunkName[chunk];
// Webpack outputs an array for each chunk when using sourcemaps
if (chunkValue instanceof Array) {
// Is the main bundle always the first JS element?
chunkValue = chunkValue.find(function(filename) {
return /\.js$/.test(filename);
});
}
if (compilation.options.output.publicPath) {
chunkValue = compilation.options.output.publicPath + chunkValue;
}
assets[chunk] = chunkValue;
}
return assets;
};
function pathToAssetName(outputPath) {
var outputFileName = outputPath.replace(/^(\/|\\)/, ''); // Remove leading slashes for webpack-dev-server
if (!/\.(html?)$/i.test(outputFileName)) {
outputFileName = path.join(outputFileName, 'index.html');
}
return outputFileName;
}
function makeObject(key, value) {
var obj = {};
obj[key] = value;
return obj;
}
function relativePathsFromHtml(options) {
var html = options.source;
var currentPath = options.path;
var $ = cheerio.load(html);
var linkHrefs = $('a[href]')
.map(function(i, el) {
return $(el).attr('href');
})
.get();
var iframeSrcs = $('iframe[src]')
.map(function(i, el) {
return $(el).attr('src');
})
.get();
return []
.concat(linkHrefs)
.concat(iframeSrcs)
.map(function(href) {
if (href.indexOf('//') === 0) {
return null
}
var parsed = url.parse(href);
if (parsed.protocol || typeof parsed.path !== 'string') {
return null;
}
return parsed.path.indexOf('/') === 0 ?
parsed.path :
url.resolve(currentPath, parsed.path);
})
.filter(function(href) {
return href != null;
});
}
function legacyArgsToOptions(entry, paths, locals, globals) {
return {
entry: entry,
paths: paths,
locals: locals,
globals: globals
};
}
function addThisCompilationHandler(compiler, callback) {
Iif(compiler.hooks) {
/* istanbul ignore next */
compiler.hooks.thisCompilation.tap('static-site-generator-webpack-plugin', callback);
} else {
compiler.plugin('this-compilation', callback);
}
}
function addOptimizeAssetsHandler(compilation, callback) {
Iif(compilation.hooks) {
/* istanbul ignore next */
compilation.hooks.optimizeAssets.tapAsync('static-site-generator-webpack-plugin',callback);
} else {
compilation.plugin('optimize-assets', callback);
}
}
module.exports = StaticSiteGeneratorWebpackPlugin;
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