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Gruntfile.js
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Gruntfile.js
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'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']);
};