App
The App struct bundles catalog, params, hooks, and runners together and provides methods for pipeline execution and CLI dispatch.
pub struct App<C, P, H = (), R = DefaultRunners> {
catalog: C,
params: P,
hooks: H,
runners: R,
command: Command,
// ...
}App is generic over catalog, params, hooks, and runners. Builder methods return a new App with different type parameters, so the type system tracks what has been configured.
Subcommands
App::dispatch() selects behavior based on the stored Command:
| Command | CLI | Description |
|---|---|---|
Command::Run | my_app run | Execute the pipeline |
Command::Check | my_app check | Validate pipeline structure |
Command::Viz | my_app viz | Build graph and serve visualization |
Chapter overview
- Initialization — constructing an App (
from_yaml,from_args,new) - YAML Configuration — catalog and params files, dot-notation overrides
- Run — executing the pipeline
- Check — validating pipeline structure via CLI
- Viz — interactive pipeline visualization