Committing migrate-migrations script

bin/migrate-migrations.js

@@ -0,0 +1,77 @@
+/**
+ * This script was used to migrate the old-style .sql migraitons to knex migrations.
+ * I suspect we'll never need this again, but I committed it just in case I neede to go back.
+ *
+ * Delete this in 2024 if it wasn't used.
+ */
+
+const fs = require('fs');
+
+const path = __dirname + '/mysql-schema';
+
+const filenames = fs.readdirSync(path);
+
+for(const filename of filenames) {
+
+  const [, num, name] = filename.match(/^([0-9]{3})-(.*)\.sql$/);
+
+  const migrationSql = generateKnexMigration(+num, name, fs.readFileSync(path + '/' + filename, 'utf-8'));
+
+  fs.writeFileSync(__dirname + `/src/migrations/${num}_${name}.ts`, migrationSql);
+
+}
+
+
+
+function generateKnexMigration(num, name, sql) {
+
+  const sqlLines = sql.split(';');
+
+  let rawLines = sqlLines
+    .map(line => {
+      return line.replace('\n', '').trim()
+    })
+    .filter(line => {
+      // Skip empty lines
+      if (!line.trim().length) return false;
+      if (line==='COMMIT') return false;
+      if (line==='START TRANSACTION') return false;
+      if (line==='SET NAMES utf8mb4') return false;
+      if (line.startsWith('INSERT INTO changelog ')) return false;
+      return true;
+    })
+    .map(line => {
+      return `  await knex.raw(${'`' + line + '`'});`;
+    })
+    .join('\n') + '\n';
+
+
+  const template = `import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+
+  const result = await knex('changelog').select('id').where({id: ${num}});
+
+  if (result.length) {
+    // Migration has been applied using the old patch system
+    return;
+  }
+  await knex('changelog').insert({
+    id: ${num},
+    timestamp: Math.floor(Date.now()/1000)
+  });
+
+${rawLines}
+
+}
+
+export async function down(knex: Knex): Promise<void> {
+
+  throw new Error('This migration doesn\\'t have a "down" script');
+
+}
+`;
+
+  return template;
+
+}