build.lib.query

build.lib.query.deps

Query a package set for a dependency specification to pass to mkVirtualEnv.

Returns a specification with only the dependencies of packages, not the queried packages themselves.

This is useful for example if you want to construct a virtualenv with development dependencies for a package, but without containing the package itself.

Example

query.deps { } pythonSet {
  hello-world = [ "dev" ];
}
=>
{
  urllib3 = [ ]; # From project.dependencies
  ruff = [ ]; # From the `dev` group
}

Arguments

customisations : Query customisations (whether to include project.dependencies or not)

pythonSet : Python package set

specification : Dependency specifications in the form used by mkVirtualEnv