const chalk = require('chalk'); const PluginError = require('plugin-error'); const replaceExtension = require('replace-ext'); const stripAnsi = require('strip-ansi'); const through = require('through2'); const clonedeep = require('lodash/cloneDeep'); const path = require('path'); const applySourceMap = require('vinyl-sourcemaps-apply'); const PLUGIN_NAME = 'gulp-sass'; ////////////////////////////// // Main Gulp Sass function ////////////////////////////// const gulpSass = (options, sync) => through.obj((file, enc, cb) => { // eslint-disable-line consistent-return if (file.isNull()) { return cb(null, file); } if (file.isStream()) { return cb(new PluginError(PLUGIN_NAME, 'Streaming not supported')); } if (path.basename(file.path).indexOf('_') === 0) { return cb(); } if (!file.contents.length) { file.path = replaceExtension(file.path, '.css'); // eslint-disable-line no-param-reassign return cb(null, file); } const opts = clonedeep(options || {}); opts.data = file.contents.toString(); // we set the file path here so that libsass can correctly resolve import paths opts.file = file.path; // Ensure `indentedSyntax` is true if a `.sass` file if (path.extname(file.path) === '.sass') { opts.indentedSyntax = true; } // Ensure file's parent directory in the include path if (opts.includePaths) { if (typeof opts.includePaths === 'string') { opts.includePaths = [opts.includePaths]; } } else { opts.includePaths = []; } opts.includePaths.unshift(path.dirname(file.path)); // Generate Source Maps if plugin source-map present if (file.sourceMap) { opts.sourceMap = file.path; opts.omitSourceMapUrl = true; opts.sourceMapContents = true; } ////////////////////////////// // Handles returning the file to the stream ////////////////////////////// const filePush = (sassObj) => { let sassMap; let sassMapFile; let sassFileSrc; let sassFileSrcPath; let sourceFileIndex; // Build Source Maps! if (sassObj.map) { // Transform map into JSON sassMap = JSON.parse(sassObj.map.toString()); // Grab the stdout and transform it into stdin sassMapFile = sassMap.file.replace(/^stdout$/, 'stdin'); // Grab the base file name that's being worked on sassFileSrc = file.relative; // Grab the path portion of the file that's being worked on sassFileSrcPath = path.dirname(sassFileSrc); if (sassFileSrcPath) { // Prepend the path to all files in the sources array except the file that's being worked on sourceFileIndex = sassMap.sources.indexOf(sassMapFile); sassMap.sources = sassMap.sources.map((source, index) => { // eslint-disable-line arrow-body-style return index === sourceFileIndex ? source : path.join(sassFileSrcPath, source); }); } // Remove 'stdin' from souces and replace with filenames! sassMap.sources = sassMap.sources.filter(src => src !== 'stdin' && src); // Replace the map file with the original file name (but new extension) sassMap.file = replaceExtension(sassFileSrc, '.css'); // Apply the map applySourceMap(file, sassMap); } file.contents = sassObj.css; // eslint-disable-line no-param-reassign file.path = replaceExtension(file.path, '.css'); // eslint-disable-line no-param-reassign if (file.stat) { file.stat.atime = file.stat.mtime = file.stat.ctime = new Date(); // eslint-disable-line } cb(null, file); }; ////////////////////////////// // Handles error message ////////////////////////////// const errorM = (error) => { const filePath = (error.file === 'stdin' ? file.path : error.file) || file.path; const relativePath = path.relative(process.cwd(), filePath); const message = [chalk.underline(relativePath), error.formatted].join('\n'); error.messageFormatted = message; // eslint-disable-line no-param-reassign error.messageOriginal = error.message; // eslint-disable-line no-param-reassign error.message = stripAnsi(message); // eslint-disable-line no-param-reassign error.relativePath = relativePath; // eslint-disable-line no-param-reassign return cb(new PluginError(PLUGIN_NAME, error)); }; if (sync !== true) { ////////////////////////////// // Async Sass render ////////////////////////////// const callback = (error, obj) => { // eslint-disable-line consistent-return if (error) { return errorM(error); } filePush(obj); }; gulpSass.compiler.render(opts, callback); } else { ////////////////////////////// // Sync Sass render ////////////////////////////// try { filePush(gulpSass.compiler.renderSync(opts)); } catch (error) { return errorM(error); } } }); ////////////////////////////// // Sync Sass render ////////////////////////////// gulpSass.sync = options => gulpSass(options, true); ////////////////////////////// // Log errors nicely ////////////////////////////// gulpSass.logError = function logError(error) { const message = new PluginError('sass', error.messageFormatted).toString(); process.stderr.write(`${message}\n`); this.emit('end'); }; ////////////////////////////// // Store compiler in a prop ////////////////////////////// gulpSass.compiler = require('node-sass'); module.exports = gulpSass;