Marv

Marv is a programmatic database migration tool designed for Node.js environments, offering a flexible, driver-based approach to managing schema changes. Currently stable at version 6.1.0, it supports a wide range of relational databases including MySQL, PostgreSQL, SQLite, Microsoft SQL Server, and Oracle DB through dedicated pluggable drivers (e.g., `marv-pg-driver`). It distinguishes itself by providing both Promise and Callback-based APIs for integration into various application architectures. Marv's core functionality involves scanning a directory for SQL migration files, validating their sequence, and applying them to the target database. It enforces strict ordering, reporting errors for duplicate levels or out-of-sequence execution, which necessitates careful branching strategies when developing new migrations. Releases appear to follow a semantic versioning approach, with major versions introducing significant changes.