Add node version validations & support for env var use (#253)

packages/cli/package.json

@@ -40,9 +40,10 @@
     "chalk": "^5.1.2",
     "dotenv": "^16.4.5",
     "mime-types": "^2.1.35",
+    "ora": "^8.0.1",
     "pino": "^9.3.1",
     "pino-pretty": "^11.2.1",
-    "ora": "^8.0.1",
+    "semver": "^7.5.2",
     "yargs": "^17.7.2"
   },
   "files": [

packages/cli/src/index.ts

@@ -2,12 +2,50 @@ import dotenv from "dotenv";
 import { hideBin } from "yargs/helpers";
 import yargs from "yargs";
 import lint from "./cmds/lint.js";
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { printCriticalFailureToConsoleAndExit } from "./common/output.js";
+import { gte } from "semver";
 
 dotenv.config();
 
-void yargs(hideBin(process.argv))
+const MIN_NODE_VERSION = "20.0.0";
+
+if (gte(MIN_NODE_VERSION, process.versions.node)) {
+  await printCriticalFailureToConsoleAndExit(
+    `The Rate My OpenAPI CLI requires at least node.js v${MIN_NODE_VERSION}. You are using v${process.versions.node}. Please update your version of node.js.
+
+    Consider using a Node.js version manager such as https://github.com/nvm-sh/nvm.`,
+  );
+}
+
+let packageJson;
+try {
+  packageJson = JSON.parse(
+    readFileSync(
+      fileURLToPath(new URL("../package.json", import.meta.url)),
+      "utf-8",
+    ),
+  );
+} catch (e) {
+  await printCriticalFailureToConsoleAndExit(
+    `Unable to load rmoa. The package.json is missing or malformed.`,
+  );
+}
+
+const cli = yargs(hideBin(process.argv))
+  .env()
   .command(lint)
   .demandCommand()
   .strictCommands()
   .version()
-  .help().argv;
+  .version(packageJson?.version)
+  .fail(false)
+  .help();
+
+try {
+  await cli.argv;
+} catch (err) {
+  await printCriticalFailureToConsoleAndExit(err.message ?? err);
+  cli.showHelp();
+}