feat: add new-data-fix scaffolding script

scripts/new-data-fix.ts

@@ -0,0 +1,69 @@
+import { mkdir, writeFile, access } from 'node:fs/promises';
+import { constants as fsConstants } from 'node:fs';
+import path from 'node:path';
+
+function toSlug(raw: string): string {
+  const trimmed = raw.trim().toLowerCase();
+  const slug = trimmed.replace(/[^a-z0-9]+/g, '_').replace(/^_+|_+$/g, '');
+  return slug;
+}
+
+function formatYYYYMMDD(date: Date): string {
+  const year = String(date.getFullYear());
+  const month = String(date.getMonth() + 1).padStart(2, '0');
+  const day = String(date.getDate()).padStart(2, '0');
+  return `${year}${month}${day}`;
+}
+
+async function fileExists(filePath: string): Promise<boolean> {
+  try {
+    await access(filePath, fsConstants.F_OK);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function main(): Promise<void> {
+  const rawName = process.argv[2] ?? '';
+  const slug = toSlug(rawName);
+  if (slug.length === 0) {
+    throw new Error('usage: bun scripts/new-data-fix.ts <name>');
+  }
+
+  const id = `${formatYYYYMMDD(new Date())}_${slug}`;
+  const dir = path.join(process.cwd(), 'internal', 'database');
+  const filePath = path.join(dir, `fix_${id}.go`);
+
+  await mkdir(dir, { recursive: true });
+
+  if (await fileExists(filePath)) {
+    throw new Error(`data fix already exists: ${filePath}`);
+  }
+
+  const contents = `package database
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+)
+
+func init() {
+	registerDataFix(dataFix{
+		id: "${id}",
+		apply: func(ctx context.Context, sqlDB *sql.DB) error {
+			// TODO: implement fix
+			// _, err := sqlDB.ExecContext(ctx, \`UPDATE ...\`)
+			// if err != nil { return fmt.Errorf("...: %w", err) }
+			return fmt.Errorf("unimplemented data fix: ${id}")
+		},
+	})
+}
+`;
+
+  await writeFile(filePath, contents, { encoding: 'utf8' });
+  process.stdout.write(`${filePath}\n`);
+}
+
+await main();