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backend/dev.mjs

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+/**
+ * Run Django management commands from this backend folder.
+ * Usage:
+ *   node dev.mjs              # runserver 0.0.0.0:8000
+ *   node dev.mjs migrate
+ *   node dev.mjs seed_demo
+ */
+import { spawn } from 'node:child_process';
+import { existsSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const djangoRoot = path.dirname(fileURLToPath(import.meta.url));
+
+if (!existsSync(path.join(djangoRoot, 'manage.py'))) {
+  console.error('[backend] manage.py not found.');
+  process.exit(1);
+}
+
+const extra = process.argv.slice(2);
+const manageArgs =
+  extra.length === 0
+    ? ['manage.py', 'runserver', '0.0.0.0:8000']
+    : ['manage.py', ...extra];
+
+function resolvePython() {
+  const isWin = process.platform === 'win32';
+  const venvPython = isWin
+    ? path.join(djangoRoot, '.venv', 'Scripts', 'python.exe')
+    : path.join(djangoRoot, '.venv', 'bin', 'python');
+
+  if (existsSync(venvPython)) {
+    return venvPython;
+  }
+
+  return isWin ? 'python' : 'python3';
+}
+
+const python = resolvePython();
+const child = spawn(python, manageArgs, {
+  cwd: djangoRoot,
+  stdio: 'inherit',
+  env: process.env,
+});
+
+child.on('error', (err) => {
+  console.error(`[backend] Failed to start ${python}:`, err.message);
+  process.exit(1);
+});
+
+child.on('exit', (code, signal) => {
+  if (signal) {
+    process.exit(1);
+  }
+  process.exit(code ?? 0);
+});