Populate Pipeline
Generates the _pipeline/ directory with
pipeline.nix and dag.json. Optionally builds
the pipeline.
p (Pipeline): The pipeline to
populate.
build (Bool): (Optional) Whether to
trigger the Nix build immediately. Defaults to false.
verbose (Int): (Optional) Nix build
verbosity level. 0 keeps build failures quiet; values above
0 print failed node logs.
A status message or the output path if build=true.