An experimental TypeSpec syntax for Lexicon
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packages/cli/package.json
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packages/cli/package.json
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{
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"name": "@typelex/cli",
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"version": "0.2.5",
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"version": "0.2.7",
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"main": "dist/index.js",
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"type": "module",
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"bin": {
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"license": "MIT",
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"dependencies": {
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"@typespec/compiler": "^1.4.0",
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"picocolors": "^1.1.1",
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"yargs": "^18.0.0"
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},
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"devDependencies": {
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packages/cli/src/commands/init.ts
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packages/cli/src/commands/init.ts
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import { mkdir, writeFile, readFile, access, stat } from "fs/promises";
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import { spawn } from "child_process";
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import { createInterface } from "readline";
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import pc from "picocolors";
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function createMainTemplate(namespace: string): string {
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return `import "@typelex/emitter";
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});
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return new Promise((resolve) => {
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rl.question("\x1b[36mYour app's namespace (e.g., com.example.*): \x1b[0m", (answer) => {
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rl.question(`Enter your app's root namespace (e.g. ${pc.cyan("com.example.*")}): `, (answer) => {
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rl.close();
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resolve(answer.trim());
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});
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const mainTspPath = resolve(typelexDir, "main.tsp");
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const externalsTspPath = resolve(typelexDir, "externals.tsp");
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console.log("Initializing typelex project...\n");
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console.log(pc.bold("Initializing typelex project...\n"));
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console.log("Installing dependencies...");
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// Detect package manager: walk up from cwd
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console.log("\n✓ Installed @typelex/cli and @typelex/emitter\n");
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resolvePromise();
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} else {
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console.error("\nFailed to install dependencies");
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console.error(pc.red("✗ Failed to install dependencies"));
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process.exit(code ?? 1);
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}
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});
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install.on("error", (err) => {
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console.error("Failed to install dependencies:", err);
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console.error(pc.red("✗ Failed to install dependencies:"), err);
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reject(err);
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});
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});
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// Validate namespace format
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while (!namespace.endsWith(".*")) {
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console.error(`Error: namespace must end with .*`);
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console.error(`Got: ${namespace}\n`);
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console.error(pc.red(`Error: namespace must end with ${pc.bold(".*")}`));
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console.error(pc.red(`Got: ${pc.bold(namespace)}\n`));
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namespace = await promptNamespace();
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}
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···
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await access(mainTspPath);
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const content = await readFile(mainTspPath, "utf-8");
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if (content.trim().length > 0) {
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console.log("✓ typelex/main.tsp already exists, skipping");
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console.log(`✓ ${pc.cyan("typelex/main.tsp")} already exists, skipping`);
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shouldCreateMain = false;
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}
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} catch {
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if (shouldCreateMain) {
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await writeFile(mainTspPath, createMainTemplate(namespacePrefix), "utf-8");
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console.log("✓ Created typelex/main.tsp");
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console.log(`✓ Created ${pc.cyan("typelex/main.tsp")}`);
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}
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// Always create/overwrite externals.tsp
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await writeFile(externalsTspPath, EXTERNALS_TSP_TEMPLATE, "utf-8");
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console.log("✓ Created typelex/externals.tsp");
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console.log(`✓ Created ${pc.cyan("typelex/externals.tsp")}`);
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// Add build script to package.json
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const packageJsonPath = resolve(cwd, "package.json");
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const outFlag = lexiconsDir ? ` --out ${lexiconsDir}` : "";
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packageJson.scripts["build:typelex"] = `typelex compile ${namespace}${outFlag}`;
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await writeFile(packageJsonPath, JSON.stringify(packageJson, null, 2) + "\n", "utf-8");
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console.log("✓ Added build:typelex script to package.json");
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console.log(`✓ Added ${pc.cyan("build:typelex")} script to ${pc.cyan("package.json")}`);
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if (hasLocalLexicons) {
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console.log(` Using existing lexicons directory: ./lexicons`);
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console.log(pc.dim(` Using existing lexicons directory: ${pc.cyan("./lexicons")}`));
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} else if (lexiconsDir) {
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console.log(` Using existing lexicons directory: ${lexiconsDir}`);
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console.log(pc.dim(` Using existing lexicons directory: ${pc.cyan(lexiconsDir)}`));
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}
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} else {
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console.log("✓ build:typelex script already exists in package.json");
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console.log(`✓ ${pc.cyan("build:typelex")} script already exists in ${pc.cyan("package.json")}`);
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}
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} catch (err) {
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console.warn("⚠ Could not update package.json:", (err as Error).message);
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console.warn(pc.yellow(`⚠ Could not update ${pc.cyan("package.json")}:`), (err as Error).message);
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}
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console.log("\nTypelex initialized successfully!");
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console.log("\nNext steps:");
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console.log(" 1. Edit typelex/main.tsp to define your lexicons");
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console.log(" 2. Run: npm run build:typelex");
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console.log(pc.bold("\n✓ Typelex initialized successfully!"));
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console.log(pc.bold("\nNext steps:"));
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console.log(` 1. Edit ${pc.cyan("typelex/main.tsp")} to define your lexicons`);
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console.log(` 2. Run: ${pc.cyan("npm run build:typelex")}`);
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}