Function libcnb_package::buildpack_dependency_graph::build_libcnb_buildpacks_dependency_graph

pub fn build_libcnb_buildpacks_dependency_graph(
    cargo_workspace_root: &Path
) -> Result<Graph<BuildpackDependencyGraphNode, ()>, BuildBuildpackDependencyGraphError>

Creates a dependency graph of libcnb.rs and composite buildpacks in a directory.

Buildpacks that aren’t implemented with libcnb.rs or aren’t composite buildpacks will not be part of the dependency graph. Examples buildpacks that are not included are docker image URLs or directories containing CNBs written in bash.

Likewise, the only dependency edges in the resulting graph are dependencies declared via libcnb: URIs.

Errors

Returns Err if a buildpack declares an invalid dependency, has an invalid buildpack.toml or package.toml or an I/O error occurred while traversing the given directory.