drizzle-orm/migrator.js

Drizzle ORM package for SQL databases

import crypto from "node:crypto";
import fs from "node:fs";
import path from "node:path";
function readMigrationFiles(config) {
  let migrationFolderTo;
  if (typeof config === "string") {
    const configAsString = fs.readFileSync(path.resolve(".", config), "utf8");
    const jsonConfig = JSON.parse(configAsString);
    migrationFolderTo = jsonConfig.out;
  } else {
    migrationFolderTo = config.migrationsFolder;
  }
  if (!migrationFolderTo) {
    throw new Error("no migration folder defined");
  }
  const migrationQueries = [];
  const journalPath = `${migrationFolderTo}/meta/_journal.json`;
  if (!fs.existsSync(journalPath)) {
    throw new Error(`Can't find meta/_journal.json file`);
  }
  const journalAsString = fs.readFileSync(`${migrationFolderTo}/meta/_journal.json`).toString();
  const journal = JSON.parse(journalAsString);
  for (const journalEntry of journal.entries) {
    const migrationPath = `${migrationFolderTo}/${journalEntry.tag}.sql`;
    try {
      const query = fs.readFileSync(`${migrationFolderTo}/${journalEntry.tag}.sql`).toString();
      const result = query.split("--> statement-breakpoint").map((it) => {
        return it;
      });
      migrationQueries.push({
        sql: result,
        bps: journalEntry.breakpoints,
        folderMillis: journalEntry.when,
        hash: crypto.createHash("sha256").update(query).digest("hex")
      });
    } catch {
      throw new Error(`No file ${migrationPath} found in ${migrationFolderTo} folder`);
    }
  }
  return migrationQueries;
}
export {
  readMigrationFiles
};
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