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index.js
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index.js
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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;