schemer-cli

[aschampion]

Tom suggested a simple CLI. I agree this would be useful for trivial projects where migrations are serializable as SQL.

• schemer-cli crate
• optional adapter trait for creating an adapter instance from command line args
• optional adapter trait for creating migrations from files in directories
  • this could be based on a simple metadata TOML, or even just filenames like [id].[one or more dependency ids].up.sql for Postgres adapter
• inclusion of each adapter would be a feature on the schemer-cli crate

Would make standalone use as trivial as

cargo install schemer-cli --features postgres
schemer -a postgres:'localhost/mydb' up [directory of migrations]

[aschampion]

Popular arg parsing crates to consider:

• https://github.com/TeXitoi/structopt
• https://github.com/kbknapp/clap-rs