diff options
3 files changed, 192 insertions, 19 deletions
diff --git a/pkgs/development/interpreters/python/catch_conflicts/catch_conflicts.py b/pkgs/development/interpreters/python/catch_conflicts/catch_conflicts.py index 9339c62a6399e..319b92bee3bcf 100644 --- a/pkgs/development/interpreters/python/catch_conflicts/catch_conflicts.py +++ b/pkgs/development/interpreters/python/catch_conflicts/catch_conflicts.py @@ -5,39 +5,71 @@ import sys import os -do_abort = False -packages = collections.defaultdict(list) -out_path = Path(os.getenv("out")) -version = sys.version_info -site_packages_path = f'lib/python{version[0]}.{version[1]}/site-packages' +do_abort: bool = False +packages: dict[str, dict[str, list[dict[str, list[str]]]]] = collections.defaultdict(list) +out_path: Path = Path(os.getenv("out")) +version: tuple[int, int] = sys.version_info +site_packages_path: str = f'lib/python{version[0]}.{version[1]}/site-packages' -def find_packages(store_path, site_packages_path): - site_packages = (store_path / site_packages_path) - propagated_build_inputs = (store_path / "nix-support/propagated-build-inputs") +# pretty print a package +def describe_package(dist: PathDistribution) -> str: + return f"{dist._normalized_name} {dist.version} ({dist._path})" + + +# pretty print a list of parents (dependency chain) +def describe_parents(parents: list[str]) -> str: + if not parents: + return "" + return \ + f" dependency chain:\n " \ + + str(f"\n ...depending on: ".join(parents)) + + +# inserts an entry into 'packages' +def add_entry(name: str, version: str, store_path: str, parents: list[str]) -> None: + if name not in packages: + packages[name] = {} + if store_path not in packages[name]: + packages[name][store_path] = [] + packages[name][store_path].append(dict( + version=version, + parents=parents, + )) + + +# transitively discover python dependencies and store them in 'packages' +def find_packages(store_path: Path, site_packages_path: str, parents: list[str]) -> None: + site_packages: Path = (store_path / site_packages_path) + propagated_build_inputs: Path = (store_path / "nix-support/propagated-build-inputs") + + # add the current package to the list if site_packages.exists(): for dist_info in site_packages.glob("*.dist-info"): - dist = PathDistribution(dist_info) - packages[dist._normalized_name].append( - f"{dist._normalized_name} {dist.version} ({dist._path})" - ) + dist: PathDistribution = PathDistribution(dist_info) + add_entry(dist._normalized_name, dist.version, store_path, parents) + # recursively add dependencies if propagated_build_inputs.exists(): with open(propagated_build_inputs, "r") as f: - build_inputs = f.read().strip().split(" ") + build_inputs: list[str] = f.read().strip().split(" ") for build_input in build_inputs: - find_packages(Path(build_input), site_packages_path) + find_packages(Path(build_input), site_packages_path, parents + [build_input]) -find_packages(out_path, site_packages_path) +find_packages(out_path, site_packages_path, [f"this derivation: {out_path}"]) -for name, duplicates in packages.items(): - if len(duplicates) > 1: +# print all duplicates +for name, store_paths in packages.items(): + if len(store_paths) > 1: do_abort = True print("Found duplicated packages in closure for dependency '{}': ".format(name)) - for duplicate in duplicates: - print(f"\t{duplicate}") + for store_path, candidates in store_paths.items(): + for candidate in candidates: + print(f" {name} {candidate['version']} ({store_path})") + print(describe_parents(candidate['parents'])) +# fail if duplicates were found if do_abort: print("") print( diff --git a/pkgs/development/interpreters/python/hooks/default.nix b/pkgs/development/interpreters/python/hooks/default.nix index 0557c62eeff42..e6d093a10fb76 100644 --- a/pkgs/development/interpreters/python/hooks/default.nix +++ b/pkgs/development/interpreters/python/hooks/default.nix @@ -118,6 +118,10 @@ in { } // lib.optionalAttrs useLegacyHook { inherit setuptools; }; + passthru.tests = import ./python-catch-conflicts-hook-tests.nix { + inherit pythonOnBuildForHost runCommand; + inherit (pkgs) coreutils gnugrep writeShellScript; + }; } ./python-catch-conflicts-hook.sh) {}; pythonImportsCheckHook = callPackage ({ makePythonHook }: diff --git a/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook-tests.nix b/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook-tests.nix new file mode 100644 index 0000000000000..f3d9235799e01 --- /dev/null +++ b/pkgs/development/interpreters/python/hooks/python-catch-conflicts-hook-tests.nix @@ -0,0 +1,137 @@ +{ pythonOnBuildForHost, runCommand, writeShellScript, coreutils, gnugrep }: let + + pythonPkgs = pythonOnBuildForHost.pkgs; + + ### UTILITIES + + # customize a package so that its store paths differs + customize = pkg: pkg.overrideAttrs { some_modification = true; }; + + # generates minimal pyproject.toml + pyprojectToml = pname: builtins.toFile "pyproject.toml" '' + [project] + name = "${pname}" + version = "1.0.0" + ''; + + # generates source for a python project + projectSource = pname: runCommand "my-project-source" {} '' + mkdir -p $out/src + cp ${pyprojectToml pname} $out/pyproject.toml + touch $out/src/__init__.py + ''; + + # helper to reduce boilerplate + generatePythonPackage = args: pythonPkgs.buildPythonPackage ( + { + version = "1.0.0"; + src = runCommand "my-project-source" {} '' + mkdir -p $out/src + cp ${pyprojectToml args.pname} $out/pyproject.toml + touch $out/src/__init__.py + ''; + pyproject = true; + catchConflicts = true; + buildInputs = [ pythonPkgs.setuptools ]; + } + // args + ); + + # in order to test for a failing build, wrap it in a shell script + expectFailure = build: errorMsg: build.overrideDerivation (old: { + builder = writeShellScript "test-for-failure" '' + export PATH=${coreutils}/bin:${gnugrep}/bin:$PATH + ${old.builder} "$@" > ./log 2>&1 + status=$? + cat ./log + if [ $status -eq 0 ] || ! grep -q "${errorMsg}" ./log; then + echo "The build should have failed with '${errorMsg}', but it didn't" + exit 1 + else + echo "The build failed as expected with: ${errorMsg}" + mkdir -p $out + fi + ''; + }); +in { + + ### TEST CASES + + # Test case which must not trigger any conflicts. + # This derivation has runtime dependencies on custom versions of multiple build tools. + # This scenario is relevant for lang2nix tools which do not override the nixpkgs fix-point. + # see https://github.com/NixOS/nixpkgs/issues/283695 + ignores-build-time-deps = + generatePythonPackage { + pname = "ignores-build-time-deps"; + buildInputs = [ + pythonPkgs.build + pythonPkgs.packaging + pythonPkgs.setuptools + pythonPkgs.wheel + ]; + propagatedBuildInputs = [ + # Add customized versions of build tools as runtime deps + (customize pythonPkgs.packaging) + (customize pythonPkgs.setuptools) + (customize pythonPkgs.wheel) + ]; + }; + + # Simplest test case that should trigger a conflict + catches-simple-conflict = let + # this build must fail due to conflicts + package = pythonPkgs.buildPythonPackage rec { + pname = "catches-simple-conflict"; + version = "0.0.0"; + src = projectSource pname; + pyproject = true; + catchConflicts = true; + buildInputs = [ + pythonPkgs.setuptools + ]; + # depend on two different versions of packaging + # (an actual runtime dependency conflict) + propagatedBuildInputs = [ + pythonPkgs.packaging + (customize pythonPkgs.packaging) + ]; + }; + in + expectFailure package "Found duplicated packages in closure for dependency 'packaging'"; + + + /* + More complex test case with a transitive conflict + + Test sets up this dependency tree: + + toplevel + ├── dep1 + │ └── leaf + └── dep2 + └── leaf (customized version -> conflicting) + */ + catches-transitive-conflict = let + # package depending on both dependency1 and dependency2 + toplevel = generatePythonPackage { + pname = "catches-transitive-conflict"; + propagatedBuildInputs = [ dep1 dep2 ]; + }; + # dep1 package depending on leaf + dep1 = generatePythonPackage { + pname = "dependency1"; + propagatedBuildInputs = [ leaf ]; + }; + # dep2 package depending on conflicting version of leaf + dep2 = generatePythonPackage { + pname = "dependency2"; + propagatedBuildInputs = [ (customize leaf) ]; + }; + # some leaf package + leaf = generatePythonPackage { + pname = "leaf"; + }; + in + expectFailure toplevel "Found duplicated packages in closure for dependency 'leaf'"; +} |