var fs = require('fs'); var path = require('path'); var commondir = require('commondir'); var cloneDeep = require('lodash.clonedeep'); /** * Add boot instructions to a browserify bundler. * @param {Object} instructions Boot instructions. * @param {Object} bundler A browserify object created by `browserify()`. */ module.exports = function addInstructionsToBrowserify(instructions, bundler) { bundleModelScripts(instructions, bundler); bundleOtherScripts(instructions, bundler); bundleInstructions(instructions, bundler); }; function bundleOtherScripts(instructions, bundler) { for (var key in instructions.files) { addScriptsToBundle(key, instructions.files[key], bundler); } } function bundleModelScripts(instructions, bundler) { var files = instructions.models .map(function(m) { return m.sourceFile; }) .filter(function(f) { return !!f; }); var modelToFileMapping = instructions.models .map(function(m) { return files.indexOf(m.sourceFile); }); addScriptsToBundle('models', files, bundler); // Update `sourceFile` properties with the new paths modelToFileMapping.forEach(function(fileIx, modelIx) { if (fileIx === -1) return; instructions.models[modelIx].sourceFile = files[fileIx]; }); } function addScriptsToBundle(name, list, bundler) { if (!list.length) return; var root = commondir(list.map(path.dirname)); for (var ix in list) { var filepath = list[ix]; // Build a short unique id that does not expose too much // information about the file system, but still preserves // useful information about where is the file coming from. var fileid = 'loopback-boot#' + name + '#' + path.relative(root, filepath); // Add the file to the bundle. bundler.require(filepath, { expose: fileid }); // Rewrite the instructions entry with the new id that will be // used to load the file via `require(fileid)`. list[ix] = fileid; } } function bundleInstructions(instructions, bundler) { instructions = cloneDeep(instructions); var hasMiddleware = instructions.middleware.phases.length || instructions.middleware.middleware.length; if (hasMiddleware) { console.warn( 'Discarding middleware instructions,' + ' loopback client does not support middleware.'); } delete instructions.middleware; var instructionsString = JSON.stringify(instructions, null, 2); /* The following code does not work due to a bug in browserify * https://github.com/substack/node-browserify/issues/771 var instructionsStream = require('resumer')() .queue(instructionsString); instructionsStream.path = 'boot-instructions'; b.require(instructionsStream, { expose: 'loopback-boot#instructions' }); */ // Write the instructions to a file in our node_modules folder. // The location should not really matter as long as it is .gitignore-ed var instructionsFile = path.resolve(__dirname, '..', 'node_modules', 'instructions.json'); fs.writeFileSync(instructionsFile, instructionsString, 'utf-8'); bundler.require(instructionsFile, { expose: 'loopback-boot#instructions' }); }