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// Gleam build.js version:2021-09-12
import {
rm,
stat,
copyFile,
readFile,
mkdir,
access,
readdir,
} from "fs/promises";
import { resolve, relative, join } from "path";
import { promisify } from "util";
import { exec as callbackExec } from "child_process";
let exec = promisify(callbackExec);
export async function build() {
let { name, gleamDependencies } = JSON.parse(
await readFile("./package.json")
);
await Promise.all(gleamDependencies.map(clone));
for (let dep of gleamDependencies) await cachedBuildProject(dep);
await buildProject({
name,
root: ".",
includeTests: true,
dependencies: gleamDependencies.map((d) => d.name),
});
return {
name,
};
}
async function copyJs(name, dir) {
let inDir = join(dir, "src");
let out = outDir(name);
let files = await readdir(inDir);
files.map(async (file) => {
if (file.endsWith(".js")) {
await copyFile(join(inDir, file), join(out, file));
}
});
}
async function cachedBuildProject(info) {
if (await fileExists(outDir(info.name))) return;
await buildProject(info);
}
async function buildProject({ name, root, dependencies, includeTests }) {
console.log(`Building ${name}`);
let dir = root || libraryDir(name);
let src = join(dir, "src");
let test = join(dir, "test");
let out = outDir(name);
await rm(out, { recursive: true, force: true });
try {
await exec(
[
"gleam compile-package",
`--name ${name}`,
"--target javascript",
`--src ${src}`,
includeTests ? `--test ${test}` : "",
`--out ${out}`,
(dependencies || []).map((dep) => `--lib=${outDir(dep)}`).join(" "),
].join(" ")
);
} catch (error) {
console.error(error.stderr);
process.exit(1);
}
await copyJs(name, dir);
}
async function clone({ name, ref, url }) {
let dir = libraryDir(name);
if (await fileExists(dir)) return;
console.log("Cloning", name);
await mkdir(dir, { recursive: true });
await exec(`git clone --depth=1 --branch="${ref}" "${url}" "${dir}"`);
}
function libraryDir(name) {
return resolve(join("target", "deps", name));
}
function outDir(name) {
return resolve(join("target", "lib", name));
}
async function fileExists(path) {
try {
await access(path);
return true;
} catch {
return false;
}
}
async function test() {
let gleamPackage = await build();
console.log("Running tests...");
let dir = `target/lib/${gleamPackage.name}`;
let passes = 0;
let failures = 0;
for await (let path of await getFiles(dir)) {
if (!path.endsWith("_test.js")) continue;
let module = await import(path);
for await (let fnName of Object.keys(module)) {
if (!fnName.endsWith("_test")) continue;
try {
await module[fnName]();
process.stdout.write(`\u001b[32m.\u001b[0m`);
passes++;
} catch (error) {
let moduleName = "\n" + relative(dir, path).slice(0, -3);
process.stdout.write(`\n❌ ${moduleName}.${fnName}: ${error}\n`);
failures++;
}
}
}
console.log(`
${passes + failures} tests
${failures} failures`);
process.exit(failures ? 1 : 0);
}
async function start() {
let { name } = await build();
let { main } = await import(join(outDir(name), "main.js"));
return main();
}
async function getFiles(dir) {
const subdirs = await readdir(dir);
const files = await Promise.all(
subdirs.map(async (subdir) => {
const res = resolve(dir, subdir);
return (await stat(res)).isDirectory() ? getFiles(res) : res;
})
);
return files.reduce((a, f) => a.concat(f), []);
}
async function main() {
switch (process.argv[process.argv.length - 1]) {
case "build":
return await build();
case "test":
return await test();
case "start":
return await start();
default:
console.error(`
Usage:
node bin/build.js test
node bin/build.js build
node bin/build.js start
`);
process.exit(1);
}
}
main();
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