/
index.js
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/
index.js
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//index.js
//sass-lifter-loader
//lift sass from dependencies and write css to fs
var webpack = require('webpack');
var path = require('path');
var fs = require('fs');
var loaderUtils = require("loader-utils");
var ExtractTextPlugin = require("extract-text-webpack-plugin");
var gutil = require('gulp-util');
var _ = require('lodash');
var sass = require('node-sass');
var CachePlugin = require("webpack/lib/CachePlugin");
var crypto = require('crypto');
var myCache = {};
//require common.js for node_modules (better for server)
var node_modules = fs.readdirSync('node_modules').filter(function(x) { return x !== '.bin' });
function node_externals(context, request, cb) {
if(node_modules.indexOf(request) !== -1) {
cb(null, 'commonjs ' + request);
return;
}
cb();
}
var myWebpackConfig = {
name: 'lift sass webpack',
target: 'node',
output: {
libraryTarget: 'commonjs2',
path: path.join(__dirname, 'example', 'dist'),
filename: 'sass-lifter-loader-output'
},
resolve: {
root: __dirname,
fallback: __dirname + '/node_modules',
modulesDirectories: ['node_modules'],
extensions: ['', '.json', '.js', '.jsx', '.scss', '.png', '.jpg', '.jpeg', '.gif']
},
plugins: [
new CachePlugin(myCache)
],
resolveLoader: {
root: __dirname,
alias: {
'lift-sass': 'passthru-loader',
'passthru-loader': path.join(__dirname, 'passthru-loader')
}
},
module: {
loaders: [
{
test: /\.scss$/,
loaders: [
'noop-loader'
]
}
, {
test: /\.(jpe?g|png|gif|svg)$/i,
loaders: [
'passthru-loader'
]
}
, {
test: /\.json$/,
loaders: ['json-loader']
}
, {
test: /\.jsx$/,
loader: 'babel',
query: {
optional: ['es7.classProperties']
}
}
]
},
bail: true,
cache: true,
debug: true,
externals: [{ 'react/addons' : true, 'newrelic' : true }, node_externals]
};
module.exports = function(moduleSource) {
if(this.cacheable) this.cacheable();
var query = loaderUtils.parseQuery(this.query);
var testString = query.testString || 'scss';
var re = new RegExp('' + testString + '', 'g');
var callback = this.async();
var self = this;
var fileName = this.resourcePath.split('/').splice(-1)[0];
var manifest = path.join(query.outputDir, query.manifest);
var outputStyle = query.outputStyle || 'nested';
gutil.log('sass-lifter: lifting', gutil.colors.blue(fileName));
myWebpackConfig.entry = {
'lift-sass-loader-entry': this.resourcePath
};
webpack(myWebpackConfig, function (err, stats) {
if (err) throw err;
stats.compilation.entries.map(function(entry) {
var deps = entry.dependencies;
//storage for recursive dependencies and output
var visited = {};
var cssOutput = [];
function getNodes(root) {
//console.log('getNodes', root.userRequest);
if (root.dependencies.length > 0) {
//console.log('has deps');
root.dependencies.forEach(function (child) {
//console.log('get child nodes');
if ( child.module && child.module.userRequest && !visited[child.module.userRequest]) {
visited[child.module.userRequest] = true;
getNodes(child.module);
}
});
} else {
//console.log('no deps', root.userRequest);
visited[root.userRequest] = true;
}
}
function replaceImages(source, options, cb) {
var manifest = require(path.join(options.outputDir, options.manifest));
var urlRE = new RegExp('[\\w.\\/\\-]*(png|gif|jpg|jpeg|svg)', 'gi');
var urls = source.match(urlRE) || [];
urls.map(function(url){
var fileRE = new RegExp(url);
var prefix = options.prefix || '';
if (manifest[url]) {
source = source.replace(fileRE, path.join(prefix, manifest[url]));
}
});
cb(source);
}
for (var i = 0; i < deps.length; i++) {
//console.log('depsi', deps[i].userRequest);
if (deps[i].userRequest) {
//console.log('deps.........', deps[i].module.userRequest);
getNodes(deps[i].module);
}
}
//get paths for match
var foundPaths = [];
_.mapKeys(visited, function (value, key) {
if (re.test(key.toString())) {
//console.log('scss', key);
foundPaths.push(key);
}
});
for (var j = 0; j < foundPaths.length; j++) {
self.addDependency(foundPaths[j]);
var result = sass.renderSync({
file: foundPaths[j],
outputStyle: outputStyle
});
if (query.manifest) {
//console.log('replacing images', manifest);
replaceImages(result.css.toString(), query, function(str){
//console.log(str);
cssOutput.push(str);
});
} else {
cssOutput.push(result.css.toString());
}
}
//create outputs
var fileOut = cssOutput.join('');
var hash = crypto.createHash('md5').update(fileOut).digest('hex').substr(0, 8);
var outputFileNameBasic = fileName.split('.')[0] +'-' + hash + '.css';
var outputFileName = path.join(query.outputDir, outputFileNameBasic);
var outputManifestFile = path.join(query.outputDir, 'sass-loader-manifest.json');
//create current manifest
var outputManifest = {};
outputManifest[fileName.split('.')[0]] = outputFileNameBasic;
//join with previous manifest
try {
var readManifest = fs.readFileSync(outputManifestFile, 'utf8');
outputManifest = _.extend(outputManifest, JSON.parse(readManifest));
//console.log('output manifest joined', outputManifest);
try {
fs.writeFileSync(outputManifestFile, JSON.stringify(outputManifest), 'utf8');
} catch (err) {
gutil.log('sass-lifter:', gutil.colors.red('error appending manifest'), err);
}
} catch (err) {
gutil.log('sass-lifter:', gutil.colors.blue('manifest not found, creating manifest...'));
try {
fs.writeFileSync(outputManifestFile, JSON.stringify(outputManifest), 'utf8');
} catch(err) {
gutil.log('sass-lifter:', gutil.colors.red('could not create manifest'), err);
}
}
//write css
fs.writeFile(outputFileName, fileOut, function (err) {
if (err) {
return console.log(err);
}
gutil.log('sass-lifter:', gutil.colors.green(outputFileNameBasic), 'was saved');
});
callback(null, moduleSource);
});
});
};