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index.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).
*
* 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.
*/
import { fs, module, path, process, url } from "../util/node.js";
import { Colors } from "../util/terminal.js";
import { utf8 } from "../util/text.js";
import * as optionsUtil from "../util/options.js";
import * as generated from "./index.generated.js";
import binaryen from "../lib/binaryen.js";
import * as assemblyscriptJS from "assemblyscript";
// Use the TS->JS variant by default
var assemblyscript = assemblyscriptJS;
// Use the AS->Wasm variant as an option (experimental)
const wasmPos = process.argv.indexOf("--wasm");
if (~wasmPos) {
const wasmPath = String(process.argv[wasmPos + 1]);
process.argv.splice(wasmPos, 2);
assemblyscript = await import(new URL(wasmPath, url.pathToFileURL(process.cwd() + "/")));
}
const require = module.createRequire(import.meta.url);
const WIN = process.platform === "win32";
const EOL = WIN ? "\r\n" : "\n";
const SEP = WIN ? "\\" : "/";
const extension = ".ts";
const extension_d = `.d${extension}`;
const extension_re = new RegExp("\\" + extension + "$");
const extension_re_except_d = new RegExp("^(?!.*\\.d\\" + extension + "$).*\\" + extension + "$");
function toUpperSnakeCase(str) {
return str.replace(/-/g, "_").toUpperCase();
}
/** Ensures that an object is a wrapper class instead of just a pointer. */
// function __wrap(ptrOrObj, wrapperClass) {
// if (typeof ptrOrObj === "number") {
// return ptrOrObj === 0 ? null : wrapperClass.wrap(ptrOrObj);
// }
// return ptrOrObj;
// }
/** AssemblyScript version. */
export const version = generated.version;
/** Available CLI options. */
export const options = generated.options;
/** Prefix used for library files. */
export const libraryPrefix = generated.libraryPrefix;
/** Bundled library files. */
export const libraryFiles = generated.libraryFiles;
/** Bundled definition files. */
export const definitionFiles = generated.definitionFiles;
/** Default Binaryen optimization level. */
export const defaultOptimizeLevel = 3;
/** Default Binaryen shrink level. */
export const defaultShrinkLevel = 0;
/** Converts a configuration object to an arguments array. */
export function configToArguments(options, argv = []) {
Object.keys(options || {}).forEach(key => {
const val = options[key];
const opt = generated.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(`--${key}`, String(val));
}
});
return argv;
}
/** Convenience function that parses and compiles source strings directly. */
export async function compileString(sources, config = {}) {
if (typeof sources === "string") sources = { [`input${extension}`]: sources };
var argv = [
"--outFile", "binary",
"--textFile", "text",
];
configToArguments(config, argv);
const output = {};
const result = await main(argv.concat(Object.keys(sources)), {
readFile: name => Object.prototype.hasOwnProperty.call(sources, name) ? sources[name] : null,
writeFile: (name, contents) => { output[name] = contents; },
listFiles: () => []
});
return Object.assign(result, output);
}
/** Runs the command line utility using the specified arguments array. */
export async function main(argv, options) {
if (!Array.isArray(argv)) argv = configToArguments(argv);
if (!options) options = {};
const stats = options.stats || new Stats();
const statsBegin = stats.begin();
// Bundle semantic version
let bundleMinorVersion = 0, bundleMajorVersion = 0, bundlePatchVersion = 0;
const versionParts = (version || "").split(".");
if (versionParts.length === 3) {
bundleMajorVersion = parseInt(versionParts[0]) | 0;
bundleMinorVersion = parseInt(versionParts[1]) | 0;
bundlePatchVersion = parseInt(versionParts[2]) | 0;
}
const stdout = options.stdout || createMemoryStream();
const stderr = options.stderr || createMemoryStream();
const readFile = options.readFile || readFileNode;
const writeFile = options.writeFile || writeFileNode;
const listFiles = options.listFiles || listFilesNode;
// Parse command line options but do not populate option defaults yet
const optionsResult = optionsUtil.parse(argv, generated.options, false);
let opts = optionsResult.options;
argv = optionsResult.arguments;
const stdoutColors = new Colors(stdout);
const stderrColors = new Colors(stderr);
if (opts.noColors) {
stdoutColors.enabled = false;
stderrColors.enabled = false;
}
// Check for unknown options
const unknownOpts = optionsResult.unknown;
if (unknownOpts.length) {
unknownOpts.forEach(arg => {
stderr.write(
`${stderrColors.yellow("WARNING ")}Unknown option '${arg}'${EOL}`
);
});
}
// Check for trailing arguments
const trailingArgv = optionsResult.trailing;
if (trailingArgv.length) {
stderr.write(
`${stderrColors.yellow("WARNING ")}Unsupported trailing arguments: ${trailingArgv.join(" ")}${EOL}`
);
}
var module = null;
var binaryenModule = null;
// Prepares the result object
var prepareResult = (error, result = {}) => {
if (error) {
stderr.write(`${stderrColors.red("FAILURE ")}${error.stack.replace(/^ERROR: /i, "")}${EOL}`);
}
if (binaryenModule) binaryenModule.dispose();
if (!stats.total) stats.total = stats.end(statsBegin);
return Object.assign({ error, stdout, stderr, stats }, result);
};
// Just print the version if requested
if (opts.version) {
stdout.write(`Version ${version}${EOL}`);
return prepareResult(null);
}
// Set up base directory
const baseDir = path.normalize(opts.baseDir || ".");
// Check if a config file is present
let configPath = optionsUtil.resolvePath(opts.config || "asconfig.json", baseDir);
let configFile = path.basename(configPath);
let configDir = path.dirname(configPath);
let config = await getConfig(configFile, configDir, readFile);
let configHasEntries = config != null && Array.isArray(config.entries) && config.entries.length;
// Print the help message if requested or no source files are provided
if (opts.help || (!argv.length && !configHasEntries)) {
var out = opts.help ? stdout : stderr;
var colors = opts.help ? stdoutColors : stderrColors;
out.write([
colors.white("SYNTAX"),
" " + colors.cyan("asc") + " [entryFile ...] [options]",
"",
colors.white("EXAMPLES"),
" " + colors.cyan("asc") + " hello" + extension,
" " + colors.cyan("asc") + " hello" + extension + " -o hello.wasm -t hello.wat",
" " + colors.cyan("asc") + " hello1" + extension + " hello2" + extension + " -o -O > hello.wasm",
" " + colors.cyan("asc") + " --config asconfig.json --target release",
"",
colors.white("OPTIONS"),
].concat(
optionsUtil.help(generated.options, 24, EOL)
).join(EOL) + EOL);
return prepareResult(null);
}
// I/O must be specified if not present in the environment
if (!(fs.promises && fs.promises.readFile)) {
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");
}
// Load additional options from asconfig.json
const seenAsconfig = new Set();
seenAsconfig.add(configPath);
const target = opts.target || "release";
while (config) {
// Merge target first
if (config.targets) {
const targetOptions = config.targets[target];
if (targetOptions) {
opts = optionsUtil.merge(generated.options, opts, targetOptions, configDir);
}
}
// Merge general options
const generalOptions = config.options;
if (generalOptions) {
opts = optionsUtil.merge(generated.options, opts, generalOptions, configDir);
}
// Append entries
if (config.entries) {
for (let entry of config.entries) {
argv.push(optionsUtil.resolvePath(entry, configDir));
}
}
// Look up extended asconfig and repeat
if (config.extends) {
configPath = optionsUtil.resolvePath(config.extends, configDir, true);
configFile = path.basename(configPath);
configDir = path.dirname(configPath);
if (seenAsconfig.has(configPath)) break;
seenAsconfig.add(configPath);
config = await getConfig(configFile, configDir, readFile);
} else {
break;
}
}
// Populate option defaults once user-defined options are set
optionsUtil.addDefaults(generated.options, opts);
// If showConfig print options and exit
if (opts.showConfig) {
stderr.write(JSON.stringify({
options: opts,
entries: argv
}, null, 2));
return prepareResult(null);
}
// create a unique set of values
function unique(values) {
return [...new Set(values)];
}
// Set up options
var program, runtime;
const compilerOptions = assemblyscript.newOptions();
switch (opts.runtime) {
case "stub": runtime = 0; break;
case "minimal": runtime = 1; break;
/* incremental */
default: runtime = 2; break;
}
assemblyscript.setTarget(compilerOptions, 0);
assemblyscript.setRuntime(compilerOptions, runtime);
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.setExportStart(compilerOptions, typeof opts.exportStart === "string" ? opts.exportStart : null);
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);
assemblyscript.setExportRuntime(compilerOptions, opts.exportRuntime);
assemblyscript.setBundleVersion(compilerOptions, bundleMajorVersion, bundleMinorVersion, bundlePatchVersion);
if (!opts.stackSize && opts.runtime == "incremental") {
opts.stackSize = assemblyscript.DEFAULT_STACK_SIZE;
}
assemblyscript.setStackSize(compilerOptions, opts.stackSize);
// Instrument callback to perform GC
// prepareResult = (original => {
// return function gcBeforePrepareResult(err) {
// __unpin(compilerOptions);
// if (program) __unpin(program);
// __collect();
// return original(err);
// };
// })(prepareResult);
// 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 prepareResult(Error(`Global alias '${part}' is invalid.`));
let alias = part.substring(0, p).trim();
let name = part.substring(p + 1).trim();
if (!alias.length) {
return prepareResult(Error(`Global alias '${part}' is invalid.`));
}
assemblyscript.addGlobalAlias(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_${toUpperSnakeCase(name)}`];
if (!flag) return prepareResult(Error(`Feature '${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_${toUpperSnakeCase(name)}`];
if (!flag) return prepareResult(Error(`Feature '${name}' is unknown.`));
assemblyscript.enableFeature(compilerOptions, flag);
}
}
// Set up optimization levels
var optimizeLevel = 0;
var shrinkLevel = 0;
if (opts.optimize) {
optimizeLevel = defaultOptimizeLevel;
shrinkLevel = 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
program = assemblyscript.newProgram(compilerOptions);
// Collect transforms *constructors* from the `--transform` CLI flag as well
// as the `transform` option into the `transforms` array.
let transforms = [];
// `transform` option from `main()`
if (Array.isArray(options.transforms)) {
transforms.push(...options.transforms);
}
// `--transform` CLI flag
if (opts.transform) {
let transformArgs = unique(opts.transform);
for (let i = 0, k = transformArgs.length; i < k; ++i) {
let filename = transformArgs[i].trim();
let resolved;
let transform;
if (require.resolve) {
try {
resolved = require.resolve(filename, { paths: [process.cwd(), baseDir] });
transform = await import(url.pathToFileURL(resolved));
if (transform.default) transform = transform.default;
} catch (e1) {
try {
transform = require(resolved);
} catch (e2) {
return prepareResult(e1);
}
}
} else {
try {
transform = await import(new URL(filename, import.meta.url));
if (transform.default) transform = transform.default;
} catch (e) {
return prepareResult(e);
}
}
if (!transform || (typeof transform !== "function" && typeof transform !== "object")) {
return prepareResult(Error("not a transform: " + transformArgs[i]));
}
transforms.push(transform);
}
}
// Fix up the prototype of the transforms’ constructors and instantiate them.
try {
transforms = transforms.map(transform => {
if (typeof transform === "function") {
Object.assign(transform.prototype, {
program,
baseDir,
stdout,
stderr,
log: console.error,
readFile,
writeFile,
listFiles
});
transform = new transform();
}
return transform;
});
} catch (e) {
return prepareResult(e);
}
async function applyTransform(name, ...args) {
for (let i = 0, k = transforms.length; i < k; ++i) {
let transform = transforms[i];
if (typeof transform[name] === "function") {
try {
let start = stats.begin();
stats.transformCount++;
await transform[name](...args);
stats.transformTime += stats.end(start);
} catch (e) {
return e;
}
}
}
}
// Parse library files
Object.keys(libraryFiles).forEach(libPath => {
if (libPath.includes("/")) return; // in sub-directory: imported on demand
let begin = stats.begin();
stats.parseCount++;
assemblyscript.parse(program, libraryFiles[libPath], libraryPrefix + libPath + extension, false);
stats.parseTime += stats.end(begin);
});
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)) {
libFiles = [ path.basename(libDir) ];
libDir = path.dirname(libDir);
} else {
libFiles = await listFiles(libDir, baseDir) || [];
}
for (let libPath of libFiles) {
let libText = await readFile(libPath, libDir);
if (libText == null) {
return prepareResult(Error(`Library file '${libPath}' not found.`));
}
libraryFiles[libPath.replace(extension_re, "")] = libText;
let begin = stats.begin();
stats.parseCount++;
assemblyscript.parse(program, libText, libraryPrefix + libPath, false);
stats.parseTime += stats.end(begin);
}
}
}
opts.path = opts.path || [];
// Maps package names to parent directory
const packageBases = new Map();
// Gets the file matching the specified source path, imported at the given dependee path
async function getFile(internalPath, dependeePath) {
var sourceText = null; // text reported back to the compiler
var sourcePath = null; // path reported back to the compiler
// Try file.ext, file/index.ext, file.d.ext
if (!internalPath.startsWith(libraryPrefix)) {
if ((sourceText = await readFile(sourcePath = internalPath + extension, baseDir)) == null) {
if ((sourceText = await readFile(sourcePath = internalPath + "/index" + extension, baseDir)) == null) {
// portable d.ext: uses the .js file next to it in JS or becomes an import in Wasm
sourcePath = internalPath + extension;
sourceText = await readFile(internalPath + extension_d, baseDir);
}
}
// Search library in this order: stdlib, custom lib dirs, paths
} else {
const plainName = internalPath.substring(libraryPrefix.length);
const indexName = `${plainName}/index`;
if (Object.prototype.hasOwnProperty.call(libraryFiles, plainName)) {
sourceText = libraryFiles[plainName];
sourcePath = libraryPrefix + plainName + extension;
} else if (Object.prototype.hasOwnProperty.call(libraryFiles, indexName)) {
sourceText = libraryFiles[indexName];
sourcePath = libraryPrefix + indexName + extension;
} else { // custom lib dirs
for (const libDir of customLibDirs) {
if ((sourceText = await readFile(plainName + extension, libDir)) != null) {
sourcePath = libraryPrefix + plainName + extension;
break;
} else {
if ((sourceText = await readFile(indexName + extension, libDir)) != null) {
sourcePath = libraryPrefix + indexName + extension;
break;
}
}
}
if (sourceText == null) { // paths
const match = internalPath.match(/^~lib\/((?:@[^/]+\/)?[^/]+)(?:\/(.+))?/); // ~lib/(pkg)/(path), ~lib/(@org/pkg)/(path)
if (match) {
const packageName = match[1];
const filePath = match[2] || "index";
const basePath = packageBases.has(dependeePath) ? packageBases.get(dependeePath) : ".";
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`);
}
}
paths.push(...opts.path);
for (const currentDir of paths.map(p => path.relative(baseDir, p))) {
const plainName = filePath;
if ((sourceText = await readFile(path.join(currentDir, packageName, plainName + extension), baseDir)) != null) {
sourcePath = `${libraryPrefix}${packageName}/${plainName}${extension}`;
packageBases.set(sourcePath.replace(extension_re, ""), path.join(currentDir, packageName));
break;
}
const indexName = `${filePath}/index`;
if ((sourceText = await readFile(path.join(currentDir, packageName, indexName + extension), baseDir)) != null) {
sourcePath = `${libraryPrefix}${packageName}/${indexName}${extension}`;
packageBases.set(sourcePath.replace(extension_re, ""), path.join(currentDir, packageName));
break;
}
}
}
}
}
}
// No such file
if (sourceText == null) return null;
return { sourceText, sourcePath };
}
// Gets all pending imported files from the the backlog
function getBacklog(paths = []) {
do {
let internalPath = assemblyscript.nextFile(program);
if (internalPath == null) break;
paths.push(internalPath);
} while (true);
return paths;
}
// Parses the backlog of imported files after including entry files
async function parseBacklog() {
var backlog;
while ((backlog = getBacklog()).length) {
let files = [];
for (let internalPath of backlog) {
const dependee = assemblyscript.getDependee(program, internalPath);
files.push(getFile(internalPath, dependee)); // queue
}
files = await Promise.all(files); // parallel
for (let i = 0, k = backlog.length; i < k; ++i) {
const internalPath = backlog[i];
const file = files[i];
const begin = stats.begin();
stats.parseCount++;
if (file) {
assemblyscript.parse(program, file.sourceText, file.sourcePath, false);
} else {
assemblyscript.parse(program, null, internalPath + extension, false);
}
stats.parseTime += stats.end(begin);
}
}
const numErrors = checkDiagnostics(program, stderr, options.reportDiagnostic, stderrColors.enabled);
if (numErrors) {
const err = Error(`${numErrors} parse error(s)`);
err.stack = err.message; // omit stack
return prepareResult(err);
}
}
// Include runtime before entry files so its setup runs first
{
let runtimeName = String(opts.runtime);
let runtimePath = `rt/index-${runtimeName}`;
let runtimeText = libraryFiles[runtimePath];
if (runtimeText == null) {
runtimePath = runtimeName;
runtimeText = await readFile(runtimePath + extension, baseDir);
if (runtimeText == null) return prepareResult(Error(`Runtime '${runtimeName}' not found.`));
} else {
runtimePath = `~lib/${runtimePath}`;
}
let begin = stats.begin();
stats.parseCount++;
assemblyscript.parse(program, runtimeText, runtimePath + extension, true);
stats.parseTime += stats.end(begin);
}
// Include entry files
for (let i = 0, k = argv.length; i < k; ++i) {
const filename = argv[i];
let sourcePath = String(filename)
.replace(/\\/g, "/")
.replace(extension_re, "")
.replace(/[\\/]$/, "");
// 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 = await readFile(sourcePath + extension, baseDir);
if (sourceText == null) {
const path = `${sourcePath}/index${extension}`;
sourceText = await readFile(path, baseDir);
if (sourceText != null) sourcePath = path;
else sourcePath += extension;
} else {
sourcePath += extension;
}
let begin = stats.begin();
stats.parseCount++;
assemblyscript.parse(program, sourceText, sourcePath, true);
stats.parseTime += stats.end(begin);
}
// Parse entry files
{
let code = await parseBacklog();
if (code) return code;
}
// Call afterParse transform hook
{
let error = await applyTransform("afterParse", program.parser);
if (error) return prepareResult(error);
}
// Parse additional files, if any
{
let code = await parseBacklog();
if (code) return code;
}
// Pre-emptively initialize the program
{
let begin = stats.begin();
stats.initializeCount++;
try {
assemblyscript.initializeProgram(program);
} catch (e) {
crash("initialize", e);
}
stats.initializeTime += stats.end(begin);
}
// Call afterInitialize transform hook
{
let error = await applyTransform("afterInitialize", program);
if (error) return prepareResult(error);
}
// Compile the program
{
let begin = stats.begin();
stats.compileCount++;
try {
module = assemblyscript.compile(program);
} catch (e) {
crash("compile", e);
}
stats.compileTime += stats.end(begin);
}
// From here on we are going to use Binaryen.js
binaryenModule = binaryen.wrapModule(
typeof module === "number" || module instanceof Number
? assemblyscript.getBinaryenModuleRef(module)
: module.ref
);
var numErrors = checkDiagnostics(program, stderr, options.reportDiagnostic, stderrColors.enabled);
if (numErrors) {
const err = Error(`${numErrors} compile error(s)`);
err.stack = err.message; // omit stack
return prepareResult(err);
}
// Call afterCompile transform hook
{
let error = await applyTransform("afterCompile", binaryenModule);
if (error) return prepareResult(error);
}
numErrors = checkDiagnostics(program, stderr, options.reportDiagnostic, stderrColors.enabled);
if (numErrors) {
const err = Error(`${numErrors} afterCompile error(s)`);
err.stack = err.message; // omit stack
return prepareResult(err);
}
// Validate the module if requested
if (!opts.noValidate) {
let begin = stats.begin();
stats.validateCount++;
let isValid = assemblyscript.validate(module);
stats.validateTime += stats.end(begin);
if (!isValid) {
return prepareResult(Error("validate error"));
}
}
// Set Binaryen-specific options
if (opts.trapMode === "clamp" || opts.trapMode === "js") {
let begin = stats.begin();
try {
binaryenModule.runPasses([`trap-mode-${opts.trapMode}`]);
} catch (e) {
crash("runPasses", e);
}
stats.compileTime += stats.end(begin);
} else if (opts.trapMode !== "allow") {
return prepareResult(Error("Unsupported trap mode"));
}
// Optimize the module
const debugInfo = opts.debug;
const converge = opts.converge;
const zeroFilledMemory = opts.importMemory
? opts.zeroFilledMemory
: false;
const runPasses = [];
if (opts.runPasses) {
if (typeof opts.runPasses === "string") {
opts.runPasses = opts.runPasses.split(",");
}
if (opts.runPasses.length) {
opts.runPasses.forEach(pass => {
if (!runPasses.includes(pass = pass.trim())) {
runPasses.push(pass);
}
});
}
}
{
let begin = stats.begin();
try {
stats.optimizeCount++;
assemblyscript.optimize(module, optimizeLevel, shrinkLevel, debugInfo, zeroFilledMemory);
} catch (e) {
crash("optimize", e);
}
try {
binaryenModule.runPasses(runPasses);
} catch (e) {
crash("runPasses", e);
}
if (converge) {
let last;
try {
let begin = stats.begin();
stats.emitCount++;
last = binaryenModule.emitBinary();
stats.emitTime += stats.end(begin);
} catch (e) {
crash("emitBinary (converge)", e);
}
do {
try {
stats.optimizeCount++;
assemblyscript.optimize(module, optimizeLevel, shrinkLevel, debugInfo, zeroFilledMemory);
} catch (e) {
crash("optimize (converge)", e);
}
try {
binaryenModule.runPasses(runPasses);
} catch (e) {
crash("runPasses (converge)", e);
}
let next;
try {
let begin = stats.begin();
stats.emitCount++;
next = binaryenModule.emitBinary();
stats.emitTime += stats.end(begin);
} catch (e) {
crash("emitBinary (converge)", e);
}
if (next.length >= last.length) {
if (next.length > last.length) {
stderr.write(`Last converge was suboptimial.${EOL}`);
}
break;
}
last = next;
} while (true);
}
stats.optimizeTime += stats.end(begin);
}
const pending = [];
// Prepare output
if (!opts.noEmit) {
let bindings = opts.bindings || [];
let hasStdout = false;
let hasOutFile = opts.outFile != null;
let hasTextFile = opts.textFile != null;
let hasOutput = hasOutFile || hasTextFile;
let hasFileOutput = (hasOutFile && opts.outFile.length > 0) || (hasTextFile && opts.textFile.length > 0);
let basepath = hasFileOutput
? (opts.outFile || opts.textFile).replace(/\.\w+$/, "")
: null;
let basename = hasFileOutput
? path.basename(basepath)
: "output";
assemblyscript.setBasenameHint(compilerOptions, basename);
// Write binary
if (opts.outFile != null) {
let sourceMapURL = opts.sourceMap != null
? opts.sourceMap.length
? opts.sourceMap
: `./${basename}.wasm.map`
: null;
let begin = stats.begin();
stats.emitCount++;
let wasm;
try {
wasm = binaryenModule.emitBinary(sourceMapURL);
} catch (e) {
crash("emitBinary", e);
}
stats.emitTime += stats.end(begin);
if (opts.outFile.length) {
pending.push(
writeFile(opts.outFile, wasm.binary, baseDir)
);
} else {
hasStdout = true;
writeStdout(wasm.binary);
}
// Post-process source map
if (wasm.sourceMap != "") {
if (opts.outFile.length) {
let map = JSON.parse(wasm.sourceMap);
map.sourceRoot = `./${basename}`;
let contents = [];
for (let i = 0, k = map.sources.length; i < k; ++i) {
let name = map.sources[i];
let text = assemblyscript.getSource(program, name.replace(extension_re, ""));
if (text == null) return prepareResult(Error(`Source of file '${name}' not found.`));
contents[i] = text;
}
map.sourcesContent = contents;
pending.push(
writeFile(path.join(
path.dirname(opts.outFile),
path.basename(sourceMapURL)
).replace(/^\.\//, ""), JSON.stringify(map), baseDir)
);
} else {
stderr.write(`Skipped source map (no output path)${EOL}`);
}
}
}
// Write text (also fallback)
if (opts.textFile != null || !hasOutput) {
let begin = stats.begin();
stats.emitCount++;
let out;
try {
// use superset text format when extension is `.wast`.
// Otherwise use official stack IR format (wat).
out = opts.textFile?.endsWith(".wast")
? binaryenModule.emitText()
: binaryenModule.emitStackIR(true);
} catch (e) {
crash("emitText", e);
}
stats.emitTime += stats.end(begin);
if (opts.textFile != null && opts.textFile.length) {
pending.push(
writeFile(opts.textFile, out, baseDir)
);
} else if (!hasStdout) {
hasStdout = true;
writeStdout(out);
}
}
// Write TypeScript definition
const bindingsEsm = bindings.includes("esm");
const bindingsRaw = !bindingsEsm && bindings.includes("raw");
if (bindingsEsm || bindingsRaw) {
if (basepath) {
let begin = stats.begin();
stats.emitCount++;
let source;
try {
source = assemblyscript.buildTSD(program, bindingsEsm);
} catch (e) {
crash("buildTSD", e);
}
stats.emitTime += stats.end(begin);
pending.push(
writeFile(basepath + ".d.ts", source, baseDir)
);
} else {
stderr.write(`Skipped TypeScript binding (no output path)${EOL}`);
}
}
// Write JavaScript bindings
if (bindingsEsm || bindingsRaw) {
if (basepath) {
let begin = stats.begin();
stats.emitCount++;
let source;
try {
source = assemblyscript.buildJS(program, bindingsEsm);
} catch (e) {
crash("buildJS", e);
}
stats.emitTime += stats.end(begin);
pending.push(
writeFile(basepath + ".js", source, baseDir)
);
} else {
stderr.write(`Skipped JavaScript binding (no output path)${EOL}`);
}
}
}
try {
await Promise.all(pending);
} catch (err) {
return prepareResult(err);
}
stats.total = stats.end(statsBegin);
if (opts.stats) stderr.write(stats.toString());
return prepareResult(null);
// Default implementation to read files on node
async function readFileNode(filename, baseDir) {