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asc.js
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/**
* @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 */
// Use "." instead of "/" as cwd in browsers
if (process.browser) process.cwd = function() { return "."; };
const fs = require("fs");
const path = require("path");
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 EOL = process.platform === "win32" ? "\r\n" : "\n";
const SEP = process.platform === "win32" ? "\\" : "/";
const binaryen = global.binaryen || (global.binaryen = require("binaryen"));
// Sets up an extension with its definition counterpart and relevant regexes.
function setupExtension(extension) {
if (!extension.startsWith(".")) extension = "." + extension;
return {
ext: extension,
ext_d: ".d" + extension,
re: new RegExp("\\" + extension + "$"),
re_d: new RegExp("\\.d\\" + extension + "$"),
re_except_d: new RegExp("^(?!.*\\.d\\" + extension + "$).*\\" + extension + "$"),
re_index: new RegExp("(?:^|[\\\\\\/])index\\" + extension + "$")
};
}
const defaultExtension = setupExtension(".ts");
// Proxy Binaryen's ready event
Object.defineProperty(exports, "ready", {
get: function() { 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) {
function dynRequire(...args) {
return eval("require")(...args);
}
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 : require("../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 stdDir = path.join(__dirname, "..", "std");
return {
"assembly": fs.readFileSync(path.join(stdDir, "assembly", "index" + defaultExtension.ext_d), "utf8"),
"portable": fs.readFileSync(path.join(stdDir, "portable", "index" + defaultExtension.ext_d), "utf8")
};
})();
/** 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");
const opts = optionsUtil.parse(argv, exports.options);
let args = opts.options;
argv = opts.arguments;
if (args.noColors) {
colorsUtil.stdout.supported =
colorsUtil.stderr.supported = false;
} else {
colorsUtil.stdout = colorsUtil.from(stdout);
colorsUtil.stderr = colorsUtil.from(stderr);
}
// Check for unknown arguments
if (opts.unknown.length) {
opts.unknown.forEach(arg => {
stderr.write(colorsUtil.stderr.yellow("WARNING ") + "Unknown option '" + arg + "'" + EOL);
});
}
// Check for trailing arguments
if (opts.trailing.length) {
stderr.write(colorsUtil.stderr.yellow("WARNING ") + "Unsupported trailing arguments: " + opts.trailing.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 (args.version) {
stdout.write("Version " + exports.version + (isDev ? "-dev" : "") + EOL);
return callback(null);
}
// Use another extension if requested
if (typeof args.extension === "string") {
if (/^\.?[0-9a-zA-Z]{1,14}$/.test(args.extension)) {
extension = setupExtension(args.extension);
} else {
return callback(Error("Invalid extension: " + args.extension));
}
}
// Print the help message if requested or no source files are provided
if (args.help || !argv.length) {
var out = args.help ? stdout : stderr;
var color = args.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 = args.baseDir ? path.resolve(args.baseDir) : ".";
const target = args.target;
// Once the baseDir is calculated, we can resolve the config, and its extensions
let asconfig = getAsconfig(args.config, baseDir, readFile);
let asconfigDir = baseDir;
const seenAsconfig = new Set();
seenAsconfig.add(path.join(baseDir, args.config));
while (asconfig) {
// merge target first, then merge options, then merge extended asconfigs
if (asconfig.targets && asconfig.targets[target]) {
args = optionsUtil.merge(exports.options, asconfig.targets[target], args);
}
if (asconfig.options) {
if (asconfig.options.transform) {
// ensure that a transform's path is relative to the current config
asconfig.options.transform = asconfig.options.transform.map(p => {
if (!path.isAbsolute(p)) {
if (p.startsWith(".")) {
return path.join(asconfigDir, p);
}
return require.resolve(p);
}
return p;
});
}
args = optionsUtil.merge(exports.options, args, asconfig.options);
}
// entries are added to the compilation
if (asconfig.entries) {
for (const entry of asconfig.entries) {
argv.push(
path.isAbsolute(entry)
? entry
// the entry is relative to the asconfig directory
: path.join(asconfigDir, entry)
);
}
}
// asconfig "extends" another config, merging options of it's parent
if (asconfig.extends) {
asconfigDir = path.isAbsolute(asconfig.extends)
// absolute extension path means we know the exact directory and location
? path.dirname(asconfig.extends)
// relative means we need to calculate a relative asconfigDir
: path.join(asconfigDir, path.dirname(asconfig.extends));
const fileName = path.basename(asconfig.extends);
const filePath = path.join(asconfigDir, fileName);
if (seenAsconfig.has(filePath)) {
asconfig = null;
} else {
seenAsconfig.add(filePath);
asconfig = getAsconfig(fileName, asconfigDir, readFile);
}
} else {
asconfig = null; // finished resolving the configuration chain
}
}
// If showConfig print args and exit
if (args.showConfig) {
stderr.write(JSON.stringify(args, null, 2));
return callback(null);
}
// This method resolves a path relative to the baseDir instead of process.cwd()
function resolveBasedir(arg) {
return path.resolve(baseDir, arg);
}
// create a unique set of values
function unique(values) {
return [...new Set(values)];
}
// returns a relative path from baseDir
function makeRelative(arg) {
return path.relative(baseDir, arg);
}
// postprocess we need to get absolute file locations argv
argv = unique(argv.map(resolveBasedir)).map(makeRelative);
// Set up options
const compilerOptions = assemblyscript.newOptions();
assemblyscript.setTarget(compilerOptions, 0);
assemblyscript.setNoAssert(compilerOptions, args.noAssert);
assemblyscript.setExportMemory(compilerOptions, !args.noExportMemory);
assemblyscript.setImportMemory(compilerOptions, args.importMemory);
assemblyscript.setInitialMemory(compilerOptions, args.initialMemory >>> 0);
assemblyscript.setMaximumMemory(compilerOptions, args.maximumMemory >>> 0);
assemblyscript.setSharedMemory(compilerOptions, args.sharedMemory);
assemblyscript.setImportTable(compilerOptions, args.importTable);
assemblyscript.setExportTable(compilerOptions, args.exportTable);
assemblyscript.setExplicitStart(compilerOptions, args.explicitStart);
assemblyscript.setMemoryBase(compilerOptions, args.memoryBase >>> 0);
assemblyscript.setTableBase(compilerOptions, args.tableBase >>> 0);
assemblyscript.setSourceMap(compilerOptions, args.sourceMap != null);
assemblyscript.setNoUnsafe(compilerOptions, args.noUnsafe);
assemblyscript.setPedantic(compilerOptions, args.pedantic);
assemblyscript.setLowMemoryLimit(compilerOptions, args.lowMemoryLimit >>> 0);
// Add or override aliases if specified
if (args.use) {
let aliases = args.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 = args.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 = args.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 (args.optimize) {
optimizeLevel = exports.defaultOptimizeLevel;
shrinkLevel = exports.defaultShrinkLevel;
}
if (typeof args.optimizeLevel === "number") optimizeLevel = args.optimizeLevel;
if (typeof args.shrinkLevel === "number") shrinkLevel = args.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 (args.transform) {
let tsNodeRegistered = false;
let transformArgs = unique(args.transform.map(resolveBasedir));
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
require("ts-node").register({ transpileOnly: true, skipProject: true, compilerOptions: { target: "ES2016" } });
tsNodeRegistered = true;
}
try {
const classOrModule = require(require.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 (args.lib) {
let lib = args.lib;
if (typeof lib === "string") lib = lib.trim().split(/\s*,\s*/);
customLibDirs.push(...lib.map(resolveBasedir));
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);
});
}
}
}
args.path = args.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 (args.traceResolution) stderr.write("Looking for package '" + packageName + "' file '" + filePath + "' relative to '" + basePath + "'" + EOL);
const absBasePath = path.isAbsolute(basePath) ? basePath : path.join(baseDir, basePath);
const paths = [];
for (let parts = absBasePath.split(SEP), i = parts.length, k = SEP == "/" ? 0 : 1; 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(...args.path).map(p => path.relative(baseDir, p))) {
if (args.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 (args.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 (args.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(args.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) : 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 (args.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 (!args.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 (args.trapMode === "clamp") {
stats.optimizeCount++;
stats.optimizeTime += measure(() => {
module.runPass("trap-mode-clamp");
});
} else if (args.trapMode === "js") {
stats.optimizeCount++;
stats.optimizeTime += measure(() => {
module.runPass("trap-mode-js");
});
} else if (args.trapMode !== "allow") {
module.dispose();
return callback(Error("Unsupported trap mode"));
}
// Optimize the module
const debugInfo = args.debug;
const usesARC = args.runtime == "half" || args.runtime == "full";
const converge = args.converge;
const runPasses = [];
if (args.runPasses) {
if (typeof args.runPasses === "string") {
args.runPasses = args.runPasses.split(",");
}
if (args.runPasses.length) {
args.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 (!args.noEmit) {
if (args.outFile != null) {
if (/\.was?t$/.test(args.outFile) && args.textFile == null) {
args.textFile = args.outFile;
} else if (/\.js$/.test(args.outFile) && args.jsFile == null) {
args.jsFile = args.outFile;
} else if (args.binaryFile == null) {
args.binaryFile = args.outFile;
}
}
let hasStdout = false;
let hasOutput = args.textFile != null
|| args.binaryFile != null
|| args.jsFile != null
|| args.tsdFile != null
|| args.idlFile != null;
// Write binary
if (args.binaryFile != null) {
let basename = path.basename(args.binaryFile);
let sourceMapURL = args.sourceMap != null
? args.sourceMap.length
? args.sourceMap
: "./" + basename + ".map"
: null;
let wasm;
stats.emitCount++;
stats.emitTime += measure(() => {
wasm = module.toBinary(sourceMapURL);
});
if (args.binaryFile.length) {
writeFile(args.binaryFile, wasm.output, baseDir);
} else {
writeStdout(wasm.output);
hasStdout = true;
}
// Post-process source map
if (wasm.sourceMap != null) {
if (args.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(args.binaryFile),
path.basename(sourceMapURL)
).replace(/^\.\//, ""), JSON.stringify(map), baseDir);
} else {
stderr.write("Skipped source map (stdout already occupied)" + EOL);
}
}
}
// Write text (also fallback)
if (args.textFile != null || !hasOutput) {
let wat;
if (args.textFile != null && args.textFile.length) {
stats.emitCount++;
stats.emitTime += measure(() => {
wat = module.toText();
});
writeFile(args.textFile, wat, baseDir);
} else if (!hasStdout) {
stats.emitCount++;
stats.emitTime += measure(() => {
wat = module.toText();
});
writeStdout(wat);
}
}
// Write WebIDL
if (args.idlFile != null) {
let idl;
if (args.idlFile.length) {
stats.emitCount++;
stats.emitTime += measure(() => {
idl = assemblyscript.buildIDL(program);
});
writeFile(args.idlFile, idl, baseDir);
} else if (!hasStdout) {
stats.emitCount++;
stats.emitTime += measure(() => {
idl = assemblyscript.buildIDL(program);
});
writeStdout(idl);
hasStdout = true;
}
}
// Write TypeScript definition
if (args.tsdFile != null) {
let tsd;
if (args.tsdFile.length) {
stats.emitCount++;
stats.emitTime += measure(() => {
tsd = assemblyscript.buildTSD(program);
});
writeFile(args.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 (args.jsFile != null) {
let js;
if (args.jsFile.length) {
stats.emitCount++;
stats.emitTime += measure(() => {
js = module.toAsmjs();
});
writeFile(args.jsFile, js, baseDir);
} else if (!hasStdout) {
stats.emitCount++;
stats.emitTime += measure(() => {
js = module.toAsmjs();
});
writeStdout(js);
}
}
}
module.dispose();
if (args.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);
if (typeof contents === "string") {
fs.writeFileSync(outputFilePath, contents, { encoding: "utf8" } );
} else {
fs.writeFileSync(outputFilePath, contents);
}
});
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) {