Crate libsql_migration 

LibSQL Migration Crate

libsql_migration is a Rust crate designed to manage database migrations for LibSQL (and SQLite). It provides a simple and flexible way to apply SQL migration scripts to your database, ensuring that schema changes are tracked and applied consistently.

Key Features

• Multiple Migration Sources: Supports migrations from local directories (dir feature), embedded SQL content (content feature), or remote HTTP endpoints (remote feature).
• Automatic Tracking: Creates and manages a libsql_migrations table to keep track of which migrations have already been applied.
• Simple API: Offers straightforward functions (migrate) within each feature module to apply migrations.
• Async Support: Built with async/await for non-blocking database operations.
• Feature-Gated: Use only the features you need to keep dependencies minimal.

Getting Started

Add libsql_migration to your Cargo.toml. By default, the dir feature is enabled.

[dependencies]
libsql_migration = "0.1.0" # Replace with the latest version
libsql = { version = "...", features = ["local"] } # Or other libsql features
tokio = { version = "1", features = ["full"] } # For the async runtime

If you want to use other features like content or remote, you might need to disable default features and enable the specific ones you need. See the “Features” section below.

Migration Tracking

The migrator automatically creates a libsql_migrations table in your database (if it doesn’t exist) upon the first migration attempt. This table stores the unique identifiers (e.g., filenames for dir, provided IDs for content/remote) of the migrations that have been successfully applied. Before applying any migration, the crate checks this table to prevent reapplying already executed scripts.

Features

This crate provides different ways to source migrations, controlled by Cargo features:

• dir (enabled by default): Migrates using SQL files from a local directory. See the dir module documentation for details and usage examples.
• content: Migrates using SQL content embedded directly in your code or loaded dynamically. See the content module documentation for details and usage examples. Requires disabling default features.
• remote: Migrates using SQL files fetched from a remote location (e.g., HTTP). See the remote module documentation for details and usage examples. Requires disabling default features and adding reqwest and serde as dependencies.

Enable features in your Cargo.toml:

[dependencies]
# Only enable the 'content' feature
libsql_migration = { version = "...", default-features = false, features = ["content"] }

# Enable 'remote' feature (requires reqwest and serde)
# libsql_migration = { version = "...", default-features = false, features = ["remote"] }
# reqwest = { version = "...", features = ["json"] }
# serde = { version = "...", features = ["derive"] }

# Enable 'dir' and 'remote' features (dir is default, so just adding remote works too if default is kept)
# libsql_migration = { version = "...", features = ["remote"] } # If default-features = true (default)
# libsql_migration = { version = "...", default-features = false, features = ["dir", "remote"] } # Explicit

Example Usage (using default dir feature)

For detailed examples of each feature, please refer to the respective module documentation (dir, content, remote). A basic example using the default dir feature is shown in the dir module documentation.

GitHub Repository

Modules

content

Provides migration capabilities using SQL content provided directly as strings.

dir

Provides migration capabilities using SQL files from a local directory.

errors

remote

Provides migration capabilities using SQL files fetched from a remote source.

util