/**

* @license

* Copyright 2020 Daniel Wirtz / The AssemblyScript Authors.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*

* SPDX-License-Identifier: Apache-2.0

*/

/**

* @fileoverview Compiler frontend for node.js

*

* Uses the low-level API exported from src/index.ts so it works with the compiler compiled to

* JavaScript as well as the compiler compiled to WebAssembly (eventually). Runs the sources

* directly through ts-node if distribution files are not present (indicated by a `-dev` version).

*

* Can also be packaged as a bundle suitable for in-browser use with the standard library injected

* in the build step. See dist/asc.js for the bundle and webpack.config.js for building details.

*/

/* global BUNDLE_VERSION, BUNDLE_LIBRARY, BUNDLE_DEFINITIONS */

const fs = require("fs");

const path = require("path");

const process = require("process"); // ensure shim

const utf8 = require("./util/utf8");

const colorsUtil = require("./util/colors");

const optionsUtil = require("./util/options");

const mkdirp = require("./util/mkdirp");

const find = require("./util/find");

const binaryen = global.binaryen || (global.binaryen = require("binaryen"));

const dynrequire = typeof __webpack_require__ === "function"

? __non_webpack_require__

: require;

const WIN = process.platform === "win32";

const EOL = WIN ? "\r\n" : "\n";

const SEP = WIN ? "\\" : "/";

// Sets up an extension with its definition counterpart and relevant regexes.

function setupExtension(ext) {

if (!ext.startsWith(".")) ext = "." + ext;

return {

ext,

ext_d: ".d" + ext,

re: new RegExp("\\" + ext + "$"),

re_d: new RegExp("\\.d\\" + ext + "$"),

re_except_d: new RegExp("^(?!.*\\.d\\" + ext + "$).*\\" + ext + "$"),

re_index: new RegExp("(?:^|[\\\\\\/])index\\" + ext + "$")

};

}

const defaultExtension = setupExtension(".ts");

// Proxy Binaryen's ready event

Object.defineProperty(exports, "ready", {

get() { return binaryen.ready; }

});

// Emscripten adds an `uncaughtException` listener to Binaryen that results in an additional

// useless code fragment on top of an actual error. suppress this:

if (process.removeAllListeners) process.removeAllListeners("uncaughtException");

// Use distribution files if present, otherwise run the sources directly.

var assemblyscript;

var isDev = false;

(function loadAssemblyScript() {

try {

assemblyscript = require("assemblyscript");

} catch (e) {

try { // `asc` on the command line

assemblyscript = dynrequire("../dist/assemblyscript.js");

} catch (e) {

try { // `asc` on the command line without dist files

dynrequire("ts-node").register({

project: path.join(__dirname, "..", "src", "tsconfig.json"),

skipIgnore: true,

compilerOptions: { target: "ES2016" }

});

dynrequire("../src/glue/js");

assemblyscript = dynrequire("../src");

isDev = true;

} catch (e_ts) {

try { // `require("dist/asc.js")` in explicit browser tests

assemblyscript = dynrequire("./assemblyscript");

} catch (e) {

throw Error(e_ts.stack + "\n---\n" + e.stack);

}

}

}

}

})();

/** Whether this is a webpack bundle or not. */

exports.isBundle = typeof BUNDLE_VERSION === "string";

/** Whether asc runs the sources directly or not. */

exports.isDev = isDev;

/** AssemblyScript version. */

exports.version = exports.isBundle ? BUNDLE_VERSION : dynrequire("../package.json").version;

/** Available CLI options. */

exports.options = require("./asc.json");

/** Prefix used for library files. */

exports.libraryPrefix = assemblyscript.LIBRARY_PREFIX;

/** Default Binaryen optimization level. */

exports.defaultOptimizeLevel = 3;

/** Default Binaryen shrink level. */

exports.defaultShrinkLevel = 1;

/** Bundled library files. */

exports.libraryFiles = exports.isBundle ? BUNDLE_LIBRARY : (() => { // set up if not a bundle

const libDir = path.join(__dirname, "..", "std", "assembly");

const bundled = {};

find

.files(libDir, defaultExtension.re_except_d)

.forEach(file => {

bundled[file.replace(defaultExtension.re, "")] = fs.readFileSync(path.join(libDir, file), "utf8");

});

return bundled;

})();

/** Bundled definition files. */

exports.definitionFiles = exports.isBundle ? BUNDLE_DEFINITIONS : (() => { // set up if not a bundle

const readDefinition = name => fs.readFileSync(

path.join(__dirname, "..", "std", name, "index" + defaultExtension.ext_d),

"utf8"

);

return {

assembly: readDefinition("assembly"),

portable: readDefinition("portable")

};

})();

/** Convenience function that parses and compiles source strings directly. */

exports.compileString = (sources, options) => {

if (typeof sources === "string") sources = { ["input" + defaultExtension.ext]: sources };

const output = Object.create({

stdout: createMemoryStream(),

stderr: createMemoryStream()

});

var argv = [

"--binaryFile", "binary",

"--textFile", "text",

];

Object.keys(options || {}).forEach(key => {

var val = options[key];

var opt = exports.options[key];

if (opt && opt.type === "b") {

if (val) argv.push("--" + key);

} else {

if (Array.isArray(val)) {

val.forEach(val => { argv.push("--" + key, String(val)); });

}

else argv.push("--" + key, String(val));

}

});

exports.main(argv.concat(Object.keys(sources)), {

stdout: output.stdout,

stderr: output.stderr,

readFile: name => Object.prototype.hasOwnProperty.call(sources, name) ? sources[name] : null,

writeFile: (name, contents) => { output[name] = contents; },

listFiles: () => []

});

return output;

};

/** Runs the command line utility using the specified arguments array. */

exports.main = function main(argv, options, callback) {

if (typeof options === "function") {

callback = options;

options = {};

} else if (!options) {

options = {};

}

const stdout = options.stdout || process.stdout;

const stderr = options.stderr || process.stderr;

const readFile = options.readFile || readFileNode;

const writeFile = options.writeFile || writeFileNode;

const listFiles = options.listFiles || listFilesNode;

const stats = options.stats || createStats();

let extension = defaultExtension;

// Output must be specified if not present in the environment

if (!stdout) throw Error("'options.stdout' must be specified");

if (!stderr) throw Error("'options.stderr' must be specified");

// Parse command line options but do not populate option defaults yet

const optionsResult = optionsUtil.parse(argv, exports.options, false);

let opts = optionsResult.options;

argv = optionsResult.arguments;

if (opts.noColors) {

colorsUtil.stdout.supported =

colorsUtil.stderr.supported = false;

} else {

colorsUtil.stdout = colorsUtil.from(stdout);

colorsUtil.stderr = colorsUtil.from(stderr);

}

// Check for unknown options

const unknownOpts = optionsResult.unknown;

if (unknownOpts.length) {

unknownOpts.forEach(arg => {

stderr.write(colorsUtil.stderr.yellow("WARNING ") + "Unknown option '" + arg + "'" + EOL);

});

}

// Check for trailing arguments

const trailingArgv = optionsResult.trailing;

if (trailingArgv.length) {

stderr.write(colorsUtil.stderr.yellow("WARNING ") + "Unsupported trailing arguments: " + trailingArgv.join(" ") + EOL);

}

// Use default callback if none is provided

if (!callback) callback = function defaultCallback(err) {

var code = 0;

if (err) {

stderr.write(colorsUtil.stderr.red("FAILURE ") + err.stack.replace(/^ERROR: /i, "") + EOL);

code = 1;

}

return code;

};

// Just print the version if requested

if (opts.version) {

stdout.write("Version " + exports.version + (isDev ? "-dev" : "") + EOL);

return callback(null);

}

// Use another extension if requested

if (typeof opts.extension === "string") {

if (/^\.?[0-9a-zA-Z]{1,14}$/.test(opts.extension)) {

extension = setupExtension(opts.extension);

} else {

return callback(Error("Invalid extension: " + opts.extension));

}

}

// Print the help message if requested or no source files are provided

if (opts.help || !argv.length) {

var out = opts.help ? stdout : stderr;

var color = opts.help ? colorsUtil.stdout : colorsUtil.stderr;

out.write([

color.white("SYNTAX"),

" " + color.cyan("asc") + " [entryFile ...] [options]",

"",

color.white("EXAMPLES"),

" " + color.cyan("asc") + " hello" + extension.ext,

" " + color.cyan("asc") + " hello" + extension.ext + " -b hello.wasm -t hello.wat",

" " + color.cyan("asc") + " hello1" + extension.ext + " hello2" + extension.ext + " -b -O > hello.wasm",

"",

color.white("OPTIONS"),

].concat(

optionsUtil.help(exports.options, 24, EOL)

).join(EOL) + EOL);

return callback(null);

}

// I/O must be specified if not present in the environment

if (!fs.readFileSync) {

if (readFile === readFileNode) throw Error("'options.readFile' must be specified");

if (writeFile === writeFileNode) throw Error("'options.writeFile' must be specified");

if (listFiles === listFilesNode) throw Error("'options.listFiles' must be specified");

}

// Set up base directory

const baseDir = path.normalize(opts.baseDir || ".");

// Load additional options from asconfig.json

let asconfigPath = optionsUtil.resolvePath(opts.config || "asconfig.json", baseDir);

let asconfigFile = path.basename(asconfigPath);

let asconfigDir = path.dirname(asconfigPath);

let asconfig = getAsconfig(asconfigFile, asconfigDir, readFile);

const seenAsconfig = new Set();

seenAsconfig.add(asconfigPath);

const target = opts.target || "release";

while (asconfig) {

// Merge target first

if (asconfig.targets) {

const targetOptions = asconfig.targets[target];

if (targetOptions) {

opts = optionsUtil.merge(exports.options, opts, targetOptions, asconfigDir);

}

}

// Merge general options

const generalOptions = asconfig.options;

if (generalOptions) {

opts = optionsUtil.merge(exports.options, opts, generalOptions, asconfigDir);

}

// Append entries

if (asconfig.entries) {

for (let entry of asconfig.entries) {

argv.push(optionsUtil.resolvePath(entry, asconfigDir));

}

}

// Look up extended asconfig and repeat

if (asconfig.extends) {

asconfigPath = optionsUtil.resolvePath(asconfig.extends, asconfigDir, true);

asconfigFile = path.basename(asconfigPath);

asconfigDir = path.dirname(asconfigPath);

if (seenAsconfig.has(asconfigPath)) break;

seenAsconfig.add(asconfigPath);

asconfig = getAsconfig(asconfigFile, asconfigDir, readFile);

} else {

break;

}

}

// Populate option defaults once user-defined options are set

optionsUtil.addDefaults(exports.options, opts);

// If showConfig print options and exit

if (opts.showConfig) {

stderr.write(JSON.stringify({

options: opts,

entries: argv

}, null, 2));

return callback(null);

}

// create a unique set of values

function unique(values) {

return [...new Set(values)];

}

// Set up options

const compilerOptions = assemblyscript.newOptions();

assemblyscript.setTarget(compilerOptions, 0);

assemblyscript.setNoAssert(compilerOptions, opts.noAssert);

assemblyscript.setExportMemory(compilerOptions, !opts.noExportMemory);

assemblyscript.setImportMemory(compilerOptions, opts.importMemory);

assemblyscript.setInitialMemory(compilerOptions, opts.initialMemory >>> 0);

assemblyscript.setMaximumMemory(compilerOptions, opts.maximumMemory >>> 0);

assemblyscript.setSharedMemory(compilerOptions, opts.sharedMemory);

assemblyscript.setImportTable(compilerOptions, opts.importTable);

assemblyscript.setExportTable(compilerOptions, opts.exportTable);

assemblyscript.setExplicitStart(compilerOptions, opts.explicitStart);

assemblyscript.setMemoryBase(compilerOptions, opts.memoryBase >>> 0);

assemblyscript.setTableBase(compilerOptions, opts.tableBase >>> 0);

assemblyscript.setSourceMap(compilerOptions, opts.sourceMap != null);

assemblyscript.setNoUnsafe(compilerOptions, opts.noUnsafe);

assemblyscript.setPedantic(compilerOptions, opts.pedantic);

assemblyscript.setLowMemoryLimit(compilerOptions, opts.lowMemoryLimit >>> 0);

// Add or override aliases if specified

if (opts.use) {

let aliases = opts.use;

for (let i = 0, k = aliases.length; i < k; ++i) {

let part = aliases[i];

let p = part.indexOf("=");

if (p < 0) return callback(Error("Global alias '" + part + "' is invalid."));

let alias = part.substring(0, p).trim();

let name = part.substring(p + 1).trim();

if (!alias.length) return callback(Error("Global alias '" + part + "' is invalid."));

assemblyscript.setGlobalAlias(compilerOptions, alias, name);

}

}

// Disable default features if specified

var features;

if ((features = opts.disable) != null) {

if (typeof features === "string") features = features.split(",");

for (let i = 0, k = features.length; i < k; ++i) {

let name = features[i].trim();

let flag = assemblyscript["FEATURE_" + name.replace(/-/g, "_").toUpperCase()];

if (!flag) return callback(Error("Feature '" + name + "' is unknown."));

assemblyscript.disableFeature(compilerOptions, flag);

}

}

// Enable experimental features if specified

if ((features = opts.enable) != null) {

if (typeof features === "string") features = features.split(",");

for (let i = 0, k = features.length; i < k; ++i) {

let name = features[i].trim();

let flag = assemblyscript["FEATURE_" + name.replace(/-/g, "_").toUpperCase()];

if (!flag) return callback(Error("Feature '" + name + "' is unknown."));

assemblyscript.enableFeature(compilerOptions, flag);

}

}

// Set up optimization levels

var optimizeLevel = 0;

var shrinkLevel = 0;

if (opts.optimize) {

optimizeLevel = exports.defaultOptimizeLevel;

shrinkLevel = exports.defaultShrinkLevel;

}

if (typeof opts.optimizeLevel === "number") optimizeLevel = opts.optimizeLevel;

if (typeof opts.shrinkLevel === "number") shrinkLevel = opts.shrinkLevel;

optimizeLevel = Math.min(Math.max(optimizeLevel, 0), 3);

shrinkLevel = Math.min(Math.max(shrinkLevel, 0), 2);

assemblyscript.setOptimizeLevelHints(compilerOptions, optimizeLevel, shrinkLevel);

// Initialize the program

const program = assemblyscript.newProgram(compilerOptions);

// Set up transforms

const transforms = [];

if (opts.transform) {

let tsNodeRegistered = false;

let transformArgs = unique(opts.transform);

for (let i = 0, k = transformArgs.length; i < k; ++i) {

let filename = transformArgs[i].trim();

if (!tsNodeRegistered && filename.endsWith(".ts")) { // ts-node requires .ts specifically

dynrequire("ts-node").register({ transpileOnly: true, skipProject: true, compilerOptions: { target: "ES2016" } });

tsNodeRegistered = true;

}

try {

const classOrModule = dynrequire(dynrequire.resolve(filename, { paths: [baseDir, process.cwd()] }));

if (typeof classOrModule === "function") {

Object.assign(classOrModule.prototype, {

program,

baseDir,

stdout,

stderr,

log: console.error,

readFile,

writeFile,

listFiles

});

transforms.push(new classOrModule());

} else {

transforms.push(classOrModule); // legacy module

}

} catch (e) {

return callback(e);

}

}

}

function applyTransform(name, ...args) {

for (let i = 0, k = transforms.length; i < k; ++i) {

let transform = transforms[i];

if (typeof transform[name] === "function") {

try {

stats.transformCount++;

stats.transfromTime += measure(() => {

transform[name](...args);

});

} catch (e) {

return e;

}

}

}

}

// Parse library files

Object.keys(exports.libraryFiles).forEach(libPath => {

if (libPath.indexOf("/") >= 0) return; // in sub-directory: imported on demand

stats.parseCount++;

stats.parseTime += measure(() => {

assemblyscript.parse(program, exports.libraryFiles[libPath], exports.libraryPrefix + libPath + extension.ext, false);

});

});

let customLibDirs = [];

if (opts.lib) {

let lib = opts.lib;

if (typeof lib === "string") lib = lib.split(",");

customLibDirs.push(...lib.map(p => p.trim()));

customLibDirs = unique(customLibDirs); // `lib` and `customLibDirs` may include duplicates

for (let i = 0, k = customLibDirs.length; i < k; ++i) { // custom

let libDir = customLibDirs[i];

let libFiles;

if (libDir.endsWith(extension.ext)) {

libFiles = [ path.basename(libDir) ];

libDir = path.dirname(libDir);

} else {

libFiles = listFiles(libDir, baseDir) || [];

}

for (let j = 0, l = libFiles.length; j < l; ++j) {

let libPath = libFiles[j];

let libText = readFile(libPath, libDir);

if (libText === null) return callback(Error("Library file '" + libPath + "' not found."));

stats.parseCount++;

exports.libraryFiles[libPath.replace(extension.re, "")] = libText;

stats.parseTime += measure(() => {

assemblyscript.parse(program, libText, exports.libraryPrefix + libPath, false);

});

}

}

}

opts.path = opts.path || [];

// Maps package names to parent directory

var packageMains = new Map();

var packageBases = new Map();

// Gets the file matching the specified source path, imported at the given dependee path

function getFile(internalPath, dependeePath) {

var sourceText = null; // text reported back to the compiler

var sourcePath = null; // path reported back to the compiler

const libraryPrefix = exports.libraryPrefix;

const libraryFiles = exports.libraryFiles;

// Try file.ext, file/index.ext, file.d.ext

if (!internalPath.startsWith(libraryPrefix)) {

if ((sourceText = readFile(sourcePath = internalPath + extension.ext, baseDir)) == null) {

if ((sourceText = readFile(sourcePath = internalPath + "/index" + extension.ext, baseDir)) == null) {

// portable d.ext: uses the .js file next to it in JS or becomes an import in Wasm

sourcePath = internalPath + extension.ext;

sourceText = readFile(internalPath + extension.ext_d, baseDir);

}

}

// Search library in this order: stdlib, custom lib dirs, paths

} else {

const plainName = internalPath.substring(libraryPrefix.length);

const indexName = plainName + "/index";

if (Object.prototype.hasOwnProperty.call(libraryFiles, plainName)) {

sourceText = libraryFiles[plainName];

sourcePath = libraryPrefix + plainName + extension.ext;

} else if (Object.prototype.hasOwnProperty.call(libraryFiles, indexName)) {

sourceText = libraryFiles[indexName];

sourcePath = libraryPrefix + indexName + extension.ext;

} else { // custom lib dirs

for (const libDir of customLibDirs) {

if ((sourceText = readFile(plainName + extension.ext, libDir)) != null) {

sourcePath = libraryPrefix + plainName + extension.ext;

break;

} else {

if ((sourceText = readFile(indexName + extension.ext, libDir)) != null) {

sourcePath = libraryPrefix + indexName + extension.ext;

break;

}

}

}

if (sourceText == null) { // paths

const match = internalPath.match(/^~lib\/((?:@[^/]+\/)?[^/]+)(?:\/(.+))?/); // ~lib/(pkg)/(path), ~lib/(@org/pkg)/(path)

if (match) {

const packageName = match[1];

const isPackageRoot = match[2] === undefined;

const filePath = isPackageRoot ? "index" : match[2];

const basePath = packageBases.has(dependeePath) ? packageBases.get(dependeePath) : ".";

if (opts.traceResolution) stderr.write("Looking for package '" + packageName + "' file '" + filePath + "' relative to '" + basePath + "'" + EOL);

const paths = [];

const parts = path.resolve(baseDir, basePath).split(SEP);

for (let i = parts.length, k = WIN ? 1 : 0; i >= k; --i) {

if (parts[i - 1] !== "node_modules") paths.push(parts.slice(0, i).join(SEP) + SEP + "node_modules");

}

for (const currentPath of paths.concat(...opts.path).map(p => path.relative(baseDir, p))) {

if (opts.traceResolution) stderr.write(" in " + path.join(currentPath, packageName) + EOL);

let mainPath = "assembly";

if (packageMains.has(packageName)) { // use cached

mainPath = packageMains.get(packageName);

} else { // evaluate package.json

let jsonPath = path.join(currentPath, packageName, "package.json");

let jsonText = readFile(jsonPath, baseDir);

if (jsonText != null) {

try {

let json = JSON.parse(jsonText);

if (typeof json.ascMain === "string") {

mainPath = json.ascMain.replace(extension.re_index, "");

packageMains.set(packageName, mainPath);

}

} catch (e) { /* nop */ }

}

}

const mainDir = path.join(currentPath, packageName, mainPath);

const plainName = filePath;

if ((sourceText = readFile(path.join(mainDir, plainName + extension.ext), baseDir)) != null) {

sourcePath = libraryPrefix + packageName + "/" + plainName + extension.ext;

packageBases.set(sourcePath.replace(extension.re, ""), path.join(currentPath, packageName));

if (opts.traceResolution) stderr.write(" -> " + path.join(mainDir, plainName + extension.ext) + EOL);

break;

} else if (!isPackageRoot) {

const indexName = filePath + "/index";

if ((sourceText = readFile(path.join(mainDir, indexName + extension.ext), baseDir)) !== null) {

sourcePath = libraryPrefix + packageName + "/" + indexName + extension.ext;

packageBases.set(sourcePath.replace(extension.re, ""), path.join(currentPath, packageName));

if (opts.traceResolution) stderr.write(" -> " + path.join(mainDir, indexName + extension.ext) + EOL);

break;

}

}

}

}

}

}

}

// No such file

if (sourceText == null) return null;

return { sourceText, sourcePath };

}

// Parses the backlog of imported files after including entry files

function parseBacklog() {

var internalPath;

while ((internalPath = assemblyscript.nextFile(program)) != null) {

let file = getFile(internalPath, assemblyscript.getDependee(program, internalPath));

if (file) {

stats.parseCount++;

stats.parseTime += measure(() => {

assemblyscript.parse(program, file.sourceText, file.sourcePath, false);

});

} else {

assemblyscript.parse(program, null, internalPath + extension.ext, false);

}

}

var numErrors = checkDiagnostics(program, stderr);

if (numErrors) {

const err = Error(numErrors + " parse error(s)");

err.stack = err.message; // omit stack

return callback(err);

}

}

// Include runtime template before entry files so its setup runs first

{

let runtimeName = String(opts.runtime);

let runtimePath = "rt/index-" + runtimeName;

let runtimeText = exports.libraryFiles[runtimePath];

if (runtimeText == null) {

runtimePath = runtimeName;

runtimeText = readFile(runtimePath + extension.ext, baseDir);

if (runtimeText == null) return callback(Error("Runtime '" + runtimeName + "' not found."));

} else {

runtimePath = "~lib/" + runtimePath;

}

stats.parseCount++;

stats.parseTime += measure(() => {

assemblyscript.parse(program, runtimeText, runtimePath + extension.ext, true);

});

}

// Include entry files

for (let i = 0, k = argv.length; i < k; ++i) {

const filename = argv[i];

let sourcePath = String(filename).replace(/\\/g, "/").replace(extension.re, "").replace(/[\\/]$/, "");

// Setting the path to relative path

sourcePath = path.isAbsolute(sourcePath) ? path.relative(baseDir, sourcePath).replace(/\\/g, "/") : sourcePath;

// Try entryPath.ext, then entryPath/index.ext

let sourceText = readFile(sourcePath + extension.ext, baseDir);

if (sourceText == null) {

sourceText = readFile(sourcePath + "/index" + extension.ext, baseDir);

if (sourceText != null) sourcePath += "/index" + extension.ext;

else sourcePath += extension.ext;

} else {

sourcePath += extension.ext;

}

stats.parseCount++;

stats.parseTime += measure(() => {

assemblyscript.parse(program, sourceText, sourcePath, true);

});

}

// Parse entry files

{

let code = parseBacklog();

if (code) return code;

}

// Call afterParse transform hook

{

let error = applyTransform("afterParse", program.parser);

if (error) return callback(error);

}

// Parse additional files, if any

{

let code = parseBacklog();

if (code) return code;

}

// Print files and exit if listFiles

if (opts.listFiles) {

// FIXME: not a proper C-like API

stderr.write(program.sources.map(s => s.normalizedPath).sort().join(EOL) + EOL);

return callback(null);

}

// Pre-emptively initialize the program

stats.initializeCount++;

stats.initializeTime += measure(() => {

assemblyscript.initializeProgram(program);

});

// Call afterInitialize transform hook

{

let error = applyTransform("afterInitialize", program);

if (error) return callback(error);

}

var module;

stats.compileCount++;

stats.compileTime += measure(() => {

module = assemblyscript.compile(program);

});

var numErrors = checkDiagnostics(program, stderr);

if (numErrors) {

if (module) module.dispose();

const err = Error(numErrors + " compile error(s)");

err.stack = err.message; // omit stack

return callback(err);

}

// Call afterCompile transform hook

{

let error = applyTransform("afterCompile", module);

if (error) return callback(error);

}

// Validate the module if requested

if (!opts.noValidate) {

stats.validateCount++;

let isValid;

stats.validateTime += measure(() => {

isValid = module.validate();

});

if (!isValid) {

module.dispose();

return callback(Error("validate error"));

}

}

// Set Binaryen-specific options

if (opts.trapMode === "clamp") {

stats.optimizeCount++;

stats.optimizeTime += measure(() => {

module.runPass("trap-mode-clamp");

});

} else if (opts.trapMode === "js") {

stats.optimizeCount++;

stats.optimizeTime += measure(() => {

module.runPass("trap-mode-js");

});

} else if (opts.trapMode !== "allow") {

module.dispose();

return callback(Error("Unsupported trap mode"));

}

// Optimize the module

const debugInfo = opts.debug;

const usesARC = opts.runtime == "half" || opts.runtime == "full";

const converge = opts.converge;

const runPasses = [];

if (opts.runPasses) {

if (typeof opts.runPasses === "string") {

opts.runPasses = opts.runPasses.split(",");

}

if (opts.runPasses.length) {

opts.runPasses.forEach(pass => {

if (runPasses.indexOf(pass = pass.trim()) < 0)

runPasses.push(pass);

});

}

}

stats.optimizeTime += measure(() => {

stats.optimizeCount++;

module.optimize(optimizeLevel, shrinkLevel, debugInfo, usesARC);

module.runPasses(runPasses);

if (converge) {

let last = module.toBinary();

do {

stats.optimizeCount++;

module.optimize(optimizeLevel, shrinkLevel, debugInfo, usesARC);

module.runPasses(runPasses);

let next = module.toBinary();

if (next.output.length >= last.output.length) {

if (next.output.length > last.output.length) {

stderr.write("Last converge was suboptimial." + EOL);

}

break;

}

last = next;

} while (true);

}

});

// Prepare output

if (!opts.noEmit) {

if (opts.outFile != null) {

if (/\.was?t$/.test(opts.outFile) && opts.textFile == null) {

opts.textFile = opts.outFile;

} else if (/\.js$/.test(opts.outFile) && opts.jsFile == null) {

opts.jsFile = opts.outFile;

} else if (opts.binaryFile == null) {

opts.binaryFile = opts.outFile;

}

}

let hasStdout = false;

let hasOutput = opts.textFile != null

|| opts.binaryFile != null

|| opts.jsFile != null

|| opts.tsdFile != null

|| opts.idlFile != null;

// Write binary

if (opts.binaryFile != null) {

let basename = path.basename(opts.binaryFile);

let sourceMapURL = opts.sourceMap != null

? opts.sourceMap.length

? opts.sourceMap

: "./" + basename + ".map"

: null;

let wasm;

stats.emitCount++;

stats.emitTime += measure(() => {

wasm = module.toBinary(sourceMapURL);

});

if (opts.binaryFile.length) {

writeFile(opts.binaryFile, wasm.output, baseDir);

} else {

writeStdout(wasm.output);

hasStdout = true;

}

// Post-process source map

if (wasm.sourceMap != null) {

if (opts.binaryFile.length) {

let map = JSON.parse(wasm.sourceMap);

map.sourceRoot = "./" + basename;

let contents = [];

map.sources.forEach((name, index) => {

let text = assemblyscript.getSource(program, name.replace(extension.re, ""));

if (text == null) return callback(Error("Source of file '" + name + "' not found."));

contents[index] = text;

});

map.sourcesContent = contents;

writeFile(path.join(

path.dirname(opts.binaryFile),

path.basename(sourceMapURL)

).replace(/^\.\//, ""), JSON.stringify(map), baseDir);

} else {

stderr.write("Skipped source map (stdout already occupied)" + EOL);

}

}

}

// Write text (also fallback)

if (opts.textFile != null || !hasOutput) {

let wat;

if (opts.textFile != null && opts.textFile.length) {

stats.emitCount++;

stats.emitTime += measure(() => {

wat = module.toText();

});

writeFile(opts.textFile, wat, baseDir);

} else if (!hasStdout) {

stats.emitCount++;

stats.emitTime += measure(() => {

wat = module.toText();

});

writeStdout(wat);

}

}

// Write WebIDL

if (opts.idlFile != null) {

let idl;

if (opts.idlFile.length) {

stats.emitCount++;

stats.emitTime += measure(() => {

idl = assemblyscript.buildIDL(program);

});

writeFile(opts.idlFile, idl, baseDir);

} else if (!hasStdout) {

stats.emitCount++;

stats.emitTime += measure(() => {

idl = assemblyscript.buildIDL(program);

});

writeStdout(idl);

hasStdout = true;

}

}

// Write TypeScript definition

if (opts.tsdFile != null) {

let tsd;

if (opts.tsdFile.length) {

stats.emitCount++;

stats.emitTime += measure(() => {

tsd = assemblyscript.buildTSD(program);

});

writeFile(opts.tsdFile, tsd, baseDir);

} else if (!hasStdout) {

stats.emitCount++;

stats.emitTime += measure(() => {

tsd = assemblyscript.buildTSD(program);

});

writeStdout(tsd);

hasStdout = true;

}

}

// Write JS (modifies the binary, so must be last)

if (opts.jsFile != null) {

let js;

if (opts.jsFile.length) {

stats.emitCount++;

stats.emitTime += measure(() => {

js = module.toAsmjs();

});

writeFile(opts.jsFile, js, baseDir);

} else if (!hasStdout) {

stats.emitCount++;

stats.emitTime += measure(() => {

js = module.toAsmjs();

});

writeStdout(js);

}

}

}

module.dispose();

if (opts.measure) {

printStats(stats, stderr);

}

return callback(null);

function readFileNode(filename, baseDir) {

let name = path.resolve(baseDir, filename);

try {

let text;

stats.readCount++;

stats.readTime += measure(() => {

text = fs.readFileSync(name, { encoding: "utf8" });

});

return text;

} catch (e) {

return null;

}

}

function writeFileNode(filename, contents, baseDir) {

try {

stats.writeCount++;

stats.writeTime += measure(() => {

const dirPath = path.resolve(baseDir, path.dirname(filename));

filename = path.basename(filename);

const outputFilePath = path.join(dirPath, filename);

if (!fs.existsSync(dirPath)) mkdirp(dirPath);

fs.writeFileSync(

outputFilePath, contents,

typeof contents === "string" ? { encoding: "utf8" } : void 0

);

});

return true;

} catch (e) {

return false;

}

}

function listFilesNode(dirname, baseDir) {

var files;

try {

stats.readCount++;

stats.readTime += measure(() => {

files = fs.readdirSync(path.join(baseDir, dirname))

.filter(file => extension.re_except_d.test(file));

});

return files;

} catch (e) {

return null;

}

}

function writeStdout(contents) {

if (!writeStdout.used) {

stats.writeCount++;

writeStdout.used = true;

}

stats.writeTime += measure(() => {

if (typeof contents === "string") {

stdout.write(contents, { encoding: "utf8" });

} else {

stdout.write(contents);

}

});