'use strict'; var through = require('through'); // The elliptic package.json is only used for its version var ellipticPackage = require('elliptic/package.json'); ellipticPackage = JSON.stringify({ version: ellipticPackage.version }); var version = require('./package.json').version; var undef = "module.exports = undefined;"; var empty = "module.exports = {};"; // We already have a random Uint8Array browser/node safe source // @TODO: Use path construction instead of ../.. var brorand = "var randomBytes = require('../../utils').randomBytes; module.exports = function(length) { return randomBytes(length); };"; var transforms = { 'ethers.js/package.json': JSON.stringify({ version: version }), // Remove the precomputed secp256k1 points "elliptic/lib/elliptic/precomputed/secp256k1.js": undef, // Remove curves we don't care about "elliptic/curve/edwards.js": empty, "elliptic/curve/mont.js": empty, "elliptic/lib/elliptic/eddsa/.*": empty, // We only use the version from this JSON package "elliptic/package.json" : ellipticPackage, // Remove RIPEMD160 "hash.js/lib/hash/ripemd.js": "module.exports = {ripemd160: null}", "hash.js/lib/hash/sha/1.js": empty, "hash.js/lib/hash/sha/224.js": empty, "hash.js/lib/hash/sha/384.js": empty, // Swap out borland for the random bytes we already have "brorand/index.js": brorand, // Used by sha3 if it exists; (so make it no exist) // "process/.*": undef, }; var modified = {}; var unmodified = {}; function transformFile(path) { for (var pattern in transforms) { if (path.match(new RegExp('/' + pattern + '$'))) { modified[pattern] = true; return transforms[pattern]; } } return null; } function transform(path, options) { var data = ''; return through(function(chunk) { data += chunk; }, function () { var transformed = transformFile(path); if (transformed != null) { console.log('Transformed:' + path); data = transformed; } else { unmodified[path] = true; } this.queue(data); this.queue(null); }); } var inflight = 0; function preBundle(bundle) { inflight++; } function postBundle(error, source, next) { if (error) { console.log(error); // } else { // source = source.toString(); } inflight-- if (inflight === 0) { // List all files that passed though unchanged var preserved = {}; Object.keys(unmodified).forEach(function(filename) { var match = filename.match(/(node_modules.*)$/); if (!match) { match = filename.match(/(ethers\.js.*)$/); } if (!match) { match = [null, filename]; } preserved[match[1]] = true; }); preserved = Object.keys(preserved); preserved.sort(); console.log('Preserved:'); preserved.forEach(function(path) { console.log(' ', path); }); // Make sure there were no replacement patterns that went unused var skipped = []; for (var key in transforms) { if (!modified[key]) { skipped.push(key); } } skipped.sort(); if (skipped.length) { console.log('Unused Patterns:'); skipped.forEach(function(pattern) { console.log(' ', pattern); }); } } next(error, source); } module.exports = function(grunt) { grunt.initConfig({ browserify: { dist: { files: { 'dist/ethers.js': './index.js', 'dist/ethers-contracts.js': './contracts/index.js', 'dist/ethers-providers.js': './providers/index.js', 'dist/ethers-utils.js': './utils/index.js', 'dist/ethers-wallet.js': './wallet/index.js', }, options: { transform: [ [ transform, { global: true } ], ], browserifyOptions: { standalone: 'ethers', }, preBundleCB: preBundle, postBundleCB: postBundle }, }, }, uglify: { dist: { files: { 'dist/ethers.min.js' : [ './dist/ethers.js' ], 'dist/ethers-contracts.min.js' : [ './dist/ethers-contracts.js' ], 'dist/ethers-providers.min.js' : [ './dist/ethers-providers.js' ], 'dist/ethers-utils.min.js' : [ './dist/ethers-utils.js' ], 'dist/ethers-wallet.min.js' : [ './dist/ethers-wallet.js' ], } } } }); grunt.loadNpmTasks('grunt-browserify'); grunt.loadNpmTasks('grunt-contrib-uglify'); grunt.registerTask('dist', ['browserify', 'uglify']); };