v0.13.0

The highlight of this release is the cargo libcnb package changes to support compilation of both buildpacks and meta-buildpacks.

Changed

• libcnb-cargo: The cargo libcnb package command now supports compiling buildpacks and meta-buildpacks (#575):
  • When used in a buildpack directory it will compile only that buildpack.
  • When used in a workspace directory it will compile all buildpacks found in subdirectories.
• libcnb-package: Changed default_buildpack_directory_name to accept a BuildpackId (#575)

Added

• libcnb-cargo
  • Buildpacks can reference other buildpacks within a workspace by using uri = "libcnb:{buildpack_id}" as a dependency entry in the buildpack's package.toml file. (#575)
• libcnb-data
  • Serialization / deserialization of package.toml files supported with the Buildpackage struct. (#575)
• libcnb-package
  • Added read_buildpackage_data, find_buildpack_dirs, get_buildpack_target_dir to support packaging operations. (#575)
  • Added buildpack_dependency::BuildpackDependency, buildpack_dependency::get_local_buildpackage_dependencies, buildpack_dependency::rewrite_buildpackage_local_dependencies, buildpack_dependency::rewrite_buildpackage_relative_path_dependencies_to_absolute to support Buildpack dependency handling and packaging operations. (#575)
  • Added buildpack_package::BuildpackPackage, buildpack_package::read_buildpack_package to support libcnb.rs-based Rust packages. (#575)
  • Added dependency_graph::DependencyNode, dependency_graph::create_dependency_graph, dependency_graph::get_dependencies to support dependency ordering and resolution in libcnb.rs-based Rust packages. (#575)