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44 lines
1.2 KiB
TypeScript
44 lines
1.2 KiB
TypeScript
import type { DatabaseSync } from "node:sqlite";
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import { up as up0001CommentLikes } from "./migrations/0001_comment_likes.ts";
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interface Migration {
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name: string;
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up: (db: DatabaseSync) => void;
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}
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// Append-only — never edit or reorder a migration once it has shipped.
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// Each `up` must be idempotent: it also runs against fresh databases created
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// straight from schema.sql, where the change it makes already exists.
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const MIGRATIONS: Migration[] = [
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{ name: "0001_comment_likes", up: up0001CommentLikes },
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];
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export function runMigrations(db: DatabaseSync): void {
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db.exec(`CREATE TABLE IF NOT EXISTS schema_migrations (
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name TEXT PRIMARY KEY,
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applied_at TEXT NOT NULL
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);`);
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const applied = new Set(
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(db.prepare(`SELECT name FROM schema_migrations;`).all() as {
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name: string;
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}[]).map((r) => r.name),
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);
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for (const { name, up } of MIGRATIONS) {
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if (applied.has(name)) continue;
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db.exec("BEGIN;");
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try {
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up(db);
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db.prepare(
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`INSERT INTO schema_migrations (name, applied_at) VALUES (?, ?);`,
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).run(name, new Date().toISOString());
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db.exec("COMMIT;");
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console.log(`[migrate] applied ${name}`);
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} catch (err) {
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db.exec("ROLLBACK;");
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throw err;
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}
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}
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}
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