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import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";
import childProcess from "child_process";
import esbuild from "esbuild";
import glob from "glob";
import { createRequire } from "module";
import { stdoutColors } from "../util/terminal.js";
const require = createRequire(import.meta.url);
const dirname = path.dirname(fileURLToPath(import.meta.url));
const watch = process.argv[2] === "--watch";
function prelude(name) {
return [
"/**\n",
" * @license\n",
" * ", name, "\n",
" * Copyright ", new Date().getFullYear().toString(), " Daniel Wirtz / The AssemblyScript Authors\n",
" * SPDX-License-Identifier: Apache-2.0\n",
" */"
].join("");
}
// Report what's going on
function time() {
return new Date().toISOString();
}
function reportPlugin(name) {
return {
name: "reporter",
setup(build) {
let startTime = 0;
build.onStart(() => {
console.log(`${time()} - ${name} - Starting new build ...`);
startTime = Date.now();
});
build.onEnd(({ errors, warnings }) => {
const duration = Date.now() - startTime;
if (errors.length) {
console.log(`${time()} - ${name} - ${stdoutColors.red("ERROR")} (${errors.length} errors, ${warnings.length} warnings, ${duration} ms)`);
} else {
console.log(`${time()} - ${name} - ${stdoutColors.green("SUCCESS")} (${warnings.length} warnings, ${duration} ms)`);
}
});
}
};
}
// Standard library integration
function bundleFile(filename) {
return fs.readFileSync(filename, { encoding: "utf8" }).replace(/\r\n/g, "\n");
}
const stdlibPlugin = {
name: "stdlib",
setup(build) {
build.onResolve({ filter: /\bindex\.generated\.js$/ }, args => {
return {
path: path.join(args.resolveDir, args.path),
watchFiles: glob.sync(path.join(dirname, "..", "std", "assembly") + "/**/*.ts")
.concat([
path.join(dirname, "..", "package.json"),
path.join(dirname, "..", "cli", "options.json"),
path.join(dirname, "..", "std", "portable", "index.d.ts")
])
};
});
build.onLoad({ filter: /\bindex\.generated\.js$/ }, args => {
const out = [
`// GENERATED FILE. DO NOT EDIT.\n\n`
];
const version = require("../package.json").version;
out.push(
`export const version = ${JSON.stringify(version)};\n`
);
const options = require("../cli/options.json");
out.push(
`export const options = ${JSON.stringify(options, null, 2)};\n`
);
out.push(
`export const libraryPrefix = "~lib/";\n`
);
const libraryDir = path.join(dirname, "..", "std", "assembly");
const libraryFiles = {};
for (const file of glob.sync("**/!(*.d).ts", { cwd: libraryDir })) {
libraryFiles[file.replace(/\.ts$/, "")] = bundleFile(path.join(libraryDir, file));
}
out.push(
`export const libraryFiles = ${JSON.stringify(libraryFiles, null, 2)};\n`
);
const definitionFiles = {
assembly: bundleFile(path.join(dirname, "..", "std", "assembly", "index.d.ts")),
portable: bundleFile(path.join(dirname, "..", "std", "portable", "index.d.ts"))
};
out.push(
`export const definitionFiles = ${JSON.stringify(definitionFiles, null, 2)};\n`
);
const generated = out.join("");
fs.writeFileSync(path.join(dirname, "..", "cli", "index.generated.js"), generated);
return {
contents: generated,
loader: "js"
};
});
}
};
// Diagnostic messages integration
const diagnosticsPlugin = {
name: "diagnostics",
setup(build) {
build.onResolve({ filter: /\bdiagnosticMessages\.generated$/ }, args => {
return {
path: path.join(args.resolveDir, args.path),
watchFiles: [
path.join(dirname, "..", "src", "diagnosticMessages.json")
]
};
});
build.onLoad({ filter: /\bdiagnosticMessages\.generated$/ }, args => {
const out = [
`// GENERATED FILE. DO NOT EDIT.\n\n`
];
function makeKey(text) {
return text.replace(/[^\w]+/g, "_").replace(/_+$/, "");
}
out.push("/** Enum of available diagnostic codes. */\n");
out.push("export enum DiagnosticCode {\n");
let first = true;
const messages = JSON.parse(fs.readFileSync(path.join(dirname, "..", "src", "diagnosticMessages.json")));
Object.keys(messages).forEach(text => {
let key = makeKey(text);
if (first)
first = false;
else {
out.push(",\n");
}
out.push(" " + key + " = " + messages[text]);
});
out.push("\n}\n\n");
out.push("/** Translates a diagnostic code to its respective string. */\n");
out.push("export function diagnosticCodeToString(code: DiagnosticCode): string {\n switch (code) {\n");
Object.keys(messages).forEach(text => {
out.push(" case " + messages[text] + ": return " + JSON.stringify(text) + ";\n");
});
out.push(" default: return \"\";\n }\n}\n");
const generated = out.join("");
fs.writeFileSync(path.join(dirname, "..", "src", "diagnosticMessages.generated.ts"), generated);
return {
contents: generated,
loader: "ts"
};
});
}
};
// Web template integration
const webPlugin = {
name: "web",
setup(build) {
build.onEnd(() => {
const startTime = Date.now();
const stdout = [];
console.log(`${time()} - ${"web"} - Starting new build ...`);
childProcess.spawn("node", [ "./build-web.js" ], {
cwd: dirname,
stdio: "pipe"
}).on("data", data => {
stdout.push(data.toString());
}).on("error", err => {
const duration = Date.now() - startTime;
console.log(stdout.join(""));
console.log(`${time()} - ${"web"} - ${stdoutColors.red("ERROR")} (had errors, ${duration} ms)`);
}).on("close", code => {
if (code) return;
const duration = Date.now() - startTime;
console.log(`${time()} - ${"web"} - ${stdoutColors.green("SUCCESS")} (no errors, ${duration} ms)`);
});
});
}
};
// Build compiler and CLI
const common = {
target: "esnext",
platform: "node",
format: "esm",
external: [
"assemblyscript",
"binaryen",
"long"
],
legalComments: "none",
bundle: true,
sourcemap: true,
treeShaking: true,
minify: true,
watch,
incremental: watch
};
const srcBuild = esbuild.build({
entryPoints: [ "./src/index.ts" ],
tsconfig: "./src/tsconfig.json",
outfile: "./dist/assemblyscript.js",
banner: { js: prelude("The AssemblyScript compiler") },
plugins: [ diagnosticsPlugin, reportPlugin("src") ],
...common
});
const cliBuild = esbuild.build({
entryPoints: [ "./cli/index.js" ],
tsconfig: "./cli/tsconfig.json",
outfile: "./dist/asc.js",
banner: { js: prelude("The AssemblyScript frontend") },
plugins: [ stdlibPlugin, webPlugin, reportPlugin("cli") ],
...common
});
// Optionally build definitions (takes a while)
let buildingDefinitions = false;
function buildDefinitions() {
const startTime = Date.now();
const stdout = [];
console.log(`${time()} - ${"dts"} - Starting new build ...`);
buildingDefinitions = true;
childProcess.spawn("node", [ "./build-dts.js" ], {
cwd: dirname,
stdio: "pipe"
}).on("data", data => {
stdout.push(data.toString());
}).on("error", err => {
buildingDefinitions = false;
const duration = Date.now() - startTime;
console.log(stdout.join(""));
console.log(`${time()} - ${"dts"} - ${stdoutColors.red("ERROR")} (had errors, ${duration} ms)`);
}).on("close", code => {
buildingDefinitions = false;
if (code) return;
const duration = Date.now() - startTime;
console.log(`${time()} - ${"dts"} - ${stdoutColors.green("SUCCESS")} (no errors, ${duration} ms)`);
});
}
if (watch) {
console.log("Watching for changes. Press RETURN to rebuild definitions.\n");
process.stdin.on("data", data => {
if (data == "\r\n" || data == "\n") {
process.stdout.write("\u001b[1A");
if (!buildingDefinitions) buildDefinitions();
}
});
}
console.log(`src : Compiler as a library
cli : Compiler frontend asc
dts : TS definition bundles
web : Example web template\n`);
await Promise.all([ srcBuild, cliBuild ]);
buildDefinitions();