gherkin-precompiler/gulp/index.js

Simple pre-compiler for Gherkin feature files

'use strict';

const through = require('through2');
const gutil = require('gulp-util');
const PluginError = gutil.PluginError;

const PLUGIN_NAME = require('../package.json').name;

const Compiler = require('./compiler');

function preCompiler(configs, formatOptions) {
    if (!configs) {
        throw new PluginError(PLUGIN_NAME, 'Missing pre-compilers!');
    }
    if (!Array.isArray(configs)) {
        configs = [configs];
    }
    const compiler = new Compiler(configs, formatOptions);

    return through.obj((file, enc, cb) => {
        try {
            if (!file.isNull() && /\.feature$/i.test(file.path)) {
                if (file.isBuffer()) {
                    file.contents = compiler.compileBuffer(file.contents);
                }
                if (file.isStream()) {
                    file.contents = file.contents.pipe(through((chunk, enc, cb) => {
                        cb(null, compiler.compileBuffer(chunk));
                    }));
                }
            }
            cb(null, file);
        } catch (e) {
            cb(e, file);
        }
    });
}

module.exports = preCompiler;