def _resolve_dep_to_crates()

in build/fbcode_builder/getdeps/cargo.py [0:0]

• 24 lines of code
• 10 McCabe index (conditional complexity)

    def _resolve_dep_to_crates(self, build_source_dir, dep_to_git):
        """
        This function traverse the build_source_dir in search of Cargo.toml
        files, extracts the crate names from them using _extract_crates
        function and returns a merged result containing crate names per
        dependency name from all Cargo.toml files in the project.
        """
        if not dep_to_git:
            return {}  # no deps, so don't waste time traversing files

        dep_to_crates = {}

        # First populate explicit crate paths from depedencies
        for name, git_conf in dep_to_git.items():
            crates = git_conf["crate_source_map"].keys()
            if crates:
                dep_to_crates.setdefault(name, set()).update(crates)

        # Now find from Cargo.tomls
        for root, _, files in os.walk(build_source_dir):
            for f in files:
                if f == "Cargo.toml":
                    more_dep_to_crates = CargoBuilder._extract_crates_used(
                        os.path.join(root, f), dep_to_git
                    )
                    for dep_name, crates in more_dep_to_crates.items():
                        existing_crates = dep_to_crates.get(dep_name, set())
                        for c in crates:
                            if c not in existing_crates:
                                print(
                                    f"Patch {self.manifest.name} uses {dep_name} crate {crates}"
                                )
                                existing_crates.insert(c)
                        dep_to_crates.setdefault(name, set()).update(existing_crates)
        return dep_to_crates