rustyroad 1.3.0

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
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//! Migration identity as recorded in the ledger.

use std::path::Path;

/// Returns the ledger identity for a migration directory path.
///
/// The ledger stores the full `<timestamp>-<name>` directory name so ordering is
/// reconstructable from the ledger alone and two migrations sharing a bare name
/// cannot collide.
pub fn ledger_id_for_dir(migration_dir: &str) -> Option<&str> {
    Path::new(migration_dir).file_name()?.to_str()
}

/// Returns the legacy bare-name form of a ledger identity.
///
/// Ledgers written before full-directory-name recording stored `add_columns` rather
/// than `20251114211514-add_columns`. Returns `None` when `ledger_id` carries no
/// timestamp prefix and is therefore already a bare name.
pub(super) fn legacy_bare_name(ledger_id: &str) -> Option<&str> {
    ledger_id.split_once('-').map(|(_, name)| name)
}