update swagger, also create a script to fetch and create swagger from kubectl command itself

Author: Anmol1696

packages/kubernetesjs/package.json

@@ -47,7 +47,8 @@
     "test:watch": "jest --watch",
     "test:teardown": "ts-node scripts/teardown.ts",
     "test:list": "ts-node scripts/list.ts",
-    "test:deploy": "ts-node scripts/deploy.ts"
+    "test:deploy": "ts-node scripts/deploy.ts",
+    "openapi:fetch": "ts-node ./scripts/fetch-swagger.ts --out ./scripts/swagger.json"
   },
   "devDependencies": {
     "schema-sdk": "^0.12.0"

packages/kubernetesjs/scripts/fetch-swagger.ts

@@ -0,0 +1,55 @@
+import { execFile } from 'child_process';
+import { writeFileSync } from 'fs';
+import { promisify } from 'util';
+
+const execFileAsync = promisify(execFile);
+
+type AnyObject = Record<string, any>;
+
+function parseArgs(argv: string[]) {
+  const args: Record<string, string | boolean> = {};
+  for (let i = 2; i < argv.length; i++) {
+    const a = argv[i];
+    if (a.startsWith('--')) {
+      const [k, v] = a.split('=');
+      const key = k.replace(/^--/, '');
+      if (typeof v === 'string') args[key] = v;
+      else if (i + 1 < argv.length && !argv[i + 1].startsWith('-')) args[key] = argv[++i];
+      else args[key] = true;
+    }
+  }
+  return args;
+}
+
+async function kubectlRaw(path: string): Promise<AnyObject> {
+  const { stdout } = await execFileAsync('kubectl', ['get', '--raw', path], { maxBuffer: 1024 * 1024 * 200 });
+  return JSON.parse(stdout.toString());
+}
+
+async function main() {
+  const args = parseArgs(process.argv);
+  const outPath = (args.out as string) || __dirname + '/swagger.v2.json';
+  const endpoint = (args.index as string) || '/openapi/v2';
+
+  console.log(`[info] fetching OpenAPI v2: ${endpoint}`);
+  const doc = await kubectlRaw(endpoint);
+
+  if (doc.openapi) {
+    console.warn('[warn] Received OpenAPI v3 document at /openapi/v2?');
+  }
+  if (doc.swagger !== '2.0') {
+    console.warn(`[warn] Expected swagger "2.0", got: ${doc.swagger || 'unknown'}`);
+  }
+
+  const pathsCount = doc.paths ? Object.keys(doc.paths).length : 0;
+  const defsCount = doc.definitions ? Object.keys(doc.definitions).length : 0;
+  console.log(`[info] fetched: ${pathsCount} paths, ${defsCount} definitions`);
+
+  writeFileSync(outPath, JSON.stringify(doc, null, 2));
+  console.log(`[info] wrote ${outPath}`);
+}
+
+main().catch(err => {
+  console.error('[error] ' + (err?.stack || err?.message || String(err)));
+  process.exit(1);
+});