Struct StorageMigration 

pub struct StorageMigration { /* private fields */ }

Runs schema migrations for a storage subsystem.

Given the current schema version (from version.json) and a target version, applies each MigrationStep in order.

Implementations

impl StorageMigration

pub fn new(steps: Vec<Box<dyn MigrationStep>>, target_version: u32) -> Self

Create a new migration runner with the given ordered steps.

pub fn migrate(&self, data_dir: &Path) -> Result<(), StorageError>

Run any necessary migrations for data_dir, updating version.json after each successful step.

Uses a copy-then-swap strategy: each step operates on a scratch directory, then the result is atomically renamed into place.

Errors

Returns StorageError::Migration if any step fails.

pub const fn target_version(&self) -> u32

Current target version this runner expects.