Cargo Features

[dependencies]
migra = { version = "1.0.0", default-features = false, features = ["sqlite", "postgres", "mysql"] }
default = postgres

The postgres feature is set by default whenever migra is added without default-features = false somewhere in the dependency tree.

sqlite = rusqlite

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

postgres default
mysql implicit feature

Enables mysql ^20.1

mysql:

Mysql client library implemented in rust

rusqlite sqlite?

Enables rusqlite ^0.25