Session upgrades - checkpoint

Author: mayfield

Gruntfile.js

@@ -0,0 +1,69 @@
+var child_process = require('child_process');
+var util = require('util');
+
+module.exports = function(grunt) {
+  'use strict';
+
+  grunt.initConfig({
+    pkg: grunt.file.readJSON('package.json'),
+    compile: {
+        curve25519: {
+            src_files: [
+              'native/ed25519/additions/*.c',
+              'native/curve25519-donna.c',
+              'native/ed25519/*.c',
+              'native/ed25519/sha512/sha2big.c'
+            ],
+            methods: [
+              'curve25519_donna',
+              'curve25519_sign',
+              'curve25519_verify',
+              'crypto_sign_ed25519_ref10_ge_scalarmult_base',
+              'sph_sha512_init',
+              'malloc'
+            ]
+        }
+    }
+  });
+
+  grunt.registerMultiTask('compile', 'Compile the C libraries with emscripten.', function() {
+      var callback = this.async();
+      var outfile = 'build/' + this.target + '.js';
+
+      var exported_functions = this.data.methods.map(function(name) {
+        return "'_" + name + "'";
+      });
+      var flags = [
+          '-O3',
+          '--memory-init-file 0',
+          '-Qunused-arguments',
+          '-s INLINING_LIMIT=1',
+          '-s WASM=0',
+          '--minify 0',
+          '-o',  outfile,
+          '-Inative/ed25519/nacl_includes -Inative/ed25519 -Inative/ed25519/sha512',
+          '-s', "EXPORTED_FUNCTIONS=\"[" + exported_functions.join(',') + "]\""];
+      var command = [].concat('emcc', this.data.src_files, flags).join(' ');
+      grunt.log.writeln('Compiling via emscripten to ' + outfile);
+
+      var exitCode = 0;
+      grunt.verbose.subhead(command);
+      grunt.verbose.writeln(util.format('Expecting exit code %d', exitCode));
+
+      var child = child_process.exec(command);
+      child.stdout.on('data', function (d) { grunt.log.write(d); });
+      child.stderr.on('data', function (d) { grunt.log.error(d); });
+      child.on('exit', function(code) {
+        if (code !== exitCode) {
+          grunt.log.error(util.format('Exited with code: %d.', code));
+          return callback(false);
+        }
+
+        grunt.verbose.ok(util.format('Exited with code: %d.', code));
+        callback(true);
+      });
+  });
+
+  grunt.registerTask('default', ['compile']);
+  grunt.registerTask('build', ['compile']);
+};