feat: support PEP 770

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

pyproject_metadata/__init__.py

@@ -219,6 +219,7 @@ class StandardMetadata:
     description: str | None = None
     license: License | str | None = None
     license_files: list[pathlib.Path] | None = None
+    sbom_files: list[pathlib.Path] | None = None
     readme: Readme | None = None
     requires_python: packaging.specifiers.SpecifierSet | None = None
     dependencies: list[Requirement] = dataclasses.field(default_factory=list)
@@ -262,7 +263,8 @@ def auto_metadata_version(self) -> str:
         """
         if self.metadata_version is not None:
             return self.metadata_version
-
+        if self.sbom_files is not None:
+            return "2.5"
         if isinstance(self.license, str) or self.license_files is not None:
             return "2.4"
         if self.dynamic_metadata:
@@ -393,6 +395,7 @@ def from_pyproject(  # noqa: C901
                 description=description,
                 license=pyproject.get_license(project, project_dir),
                 license_files=pyproject.get_license_files(project, project_dir),
+                sbom_files=pyproject.get_sbom_files(project, project_dir),
                 readme=pyproject.get_readme(project, project_dir),
                 requires_python=requires_python,
                 dependencies=pyproject.get_dependencies(project),
@@ -465,6 +468,7 @@ def validate(self, *, warn: bool = True) -> None:  # noqa: C901
         - License classifiers deprecated for metadata_version >= 2.4 (warning)
         - ``license`` is an SPDX license expression if metadata_version >= 2.4
         - ``license_files`` is supported only for metadata_version >= 2.4
+        - ``sbom-files`` is supported only for metadata_version >= 2.5
         - ``project_url`` can't contain keys over 32 characters
         """
         errors = ErrorCollector(collect_errors=self.all_errors)
@@ -527,6 +531,13 @@ def validate(self, *, warn: bool = True) -> None:  # noqa: C901
             msg = "{key} is supported only when emitting metadata version >= 2.4"
             errors.config_error(msg, key="project.license-files")
 
+        if (
+            self.sbom_files is not None
+            and self.auto_metadata_version in constants.PRE_SBOM_METADATA_VERSIONS
+        ):
+            msg = "{key} is supported only when emitting metadata version >= 2.5"
+            errors.config_error(msg, key="project.sbom-files")
+
         for name in self.urls:
             if len(name) > 32:
                 msg = "{key} names cannot be more than 32 characters long"
@@ -577,6 +588,10 @@ def _write_metadata(  # noqa: C901
         ):
             smart_message["License-File"] = os.fspath(self.license.file.as_posix())
 
+        if self.sbom_files is not None:
+            for sbom_file in sorted(set(self.sbom_files)):
+                smart_message["Sbom-File"] = os.fspath(sbom_file.as_posix())
+
         for classifier in self.classifiers:
             smart_message["Classifier"] = classifier
         # skip 'Provides-Dist'

pyproject_metadata/constants.py

@@ -15,6 +15,7 @@
     "KNOWN_MULTIUSE",
     "KNOWN_PROJECT_FIELDS",
     "KNOWN_TOPLEVEL_FIELDS",
+    "PRE_SBOM_METADATA_VERSIONS",
     "PRE_SPDX_METADATA_VERSIONS",
     "PROJECT_TO_METADATA",
 ]
@@ -24,8 +25,9 @@ def __dir__() -> list[str]:
     return __all__
 
 
-KNOWN_METADATA_VERSIONS = {"2.1", "2.2", "2.3", "2.4"}
+KNOWN_METADATA_VERSIONS = {"2.1", "2.2", "2.3", "2.4", "2.5"}
 PRE_SPDX_METADATA_VERSIONS = {"2.1", "2.2", "2.3"}
+PRE_SBOM_METADATA_VERSIONS = {"2.1", "2.2", "2.3", "2.4"}
 
 PROJECT_TO_METADATA = {
     "authors": frozenset(["Author", "Author-Email"]),
@@ -38,6 +40,7 @@ def __dir__() -> list[str]:
     "keywords": frozenset(["Keywords"]),
     "license": frozenset(["License", "License-Expression"]),
     "license-files": frozenset(["License-File"]),
+    "sbom-files": frozenset(["Sbom-File"]),
     "maintainers": frozenset(["Maintainer", "Maintainer-Email"]),
     "name": frozenset(["Name"]),
     "optional-dependencies": frozenset(["Provides-Extra", "Requires-Dist"]),
@@ -65,6 +68,7 @@ def __dir__() -> list[str]:
     "license",
     "license-expression",
     "license-file",
+    "sbom-file",
     "maintainer",
     "maintainer-email",
     "metadata-version",
@@ -91,6 +95,7 @@ def __dir__() -> list[str]:
     "provides-extra",
     "supported-platform",
     "license-file",
+    "sbom-file",
     "classifier",
     "requires-dist",
     "requires-external",

pyproject_metadata/project_table.py

@@ -61,10 +61,12 @@ class LicenseTable(TypedDict, total=False):
     "gui-scripts",
     "keywords",
     "license",
+    "license-files",
     "maintainers",
     "optional-dependencies",
     "readme",
     "requires-python",
+    "sbom-files",
     "scripts",
     "urls",
     "version",
@@ -78,6 +80,7 @@ class LicenseTable(TypedDict, total=False):
         "description": str,
         "license": Union[LicenseTable, str],
         "license-files": List[str],
+        "sbom-files": List[str],
         "readme": Union[str, ReadmeTable],
         "requires-python": str,
         "dependencies": List[str],

pyproject_metadata/pyproject.py

@@ -216,7 +216,30 @@ def get_license_files(
         if self.ensure_list(license_files, "project.license-files") is None:
             return None
 
-        return list(self._get_files_from_globs(project_dir, license_files))
+        return list(
+            self._get_files_from_globs(
+                project_dir, license_files, "project.license-files"
+            )
+        )
+
+    def get_sbom_files(
+        self, project: ProjectTable, project_dir: pathlib.Path
+    ) -> list[pathlib.Path] | None:
+        """Get the sbom-files list of files from the project table.
+
+        Returns None if an error occurred (including invalid globs, etc) or if
+        not present.
+        """
+
+        sbom_files = project.get("sbom-files")
+        if sbom_files is None:
+            return None
+        if self.ensure_list(sbom_files, "project.sbom-files") is None:
+            return None
+
+        return list(
+            self._get_files_from_globs(project_dir, sbom_files, "project.sbom-files")
+        )
 
     def get_readme(  # noqa: C901
         self, project: ProjectTable, project_dir: pathlib.Path
@@ -432,19 +455,19 @@ def get_dynamic(self, project: ProjectTable) -> list[Dynamic]:
         return dynamic
 
     def _get_files_from_globs(
-        self, project_dir: pathlib.Path, globs: Iterable[str]
+        self, project_dir: pathlib.Path, globs: Iterable[str], key: str
     ) -> Generator[pathlib.Path, None, None]:
         """Given a list of globs, get files that match."""
 
         for glob in globs:
             if glob.startswith(("..", "/")):
                 msg = "{glob!r} is an invalid {key} glob: the pattern must match files within the project directory"
-                self.config_error(msg, key="project.license-files", glob=glob)
+                self.config_error(msg, key=key, glob=glob)
                 break
             files = [f for f in project_dir.glob(glob) if f.is_file()]
             if not files:
                 msg = "Every pattern in {key} must match at least one file: {glob!r} did not match any"
-                self.config_error(msg, key="project.license-files", glob=glob)
+                self.config_error(msg, key=key, glob=glob)
                 break
             for f in files:
                 yield f.relative_to(project_dir)

tests/packages/sbom/pyproject.toml

@@ -0,0 +1,4 @@
+[project]
+name = "test-sbom"
+version = "0.1.0"
+sbom-files = ["bom.json", "sboms/*"]

tests/test_standard_metadata.py

@@ -1281,6 +1281,40 @@ def test_license_file_24(
         assert "License-File: LICENSE.txt" in message
 
 
+def test_as_json_sbom(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.chdir(DIR / "packages/sbom")
+
+    with open("pyproject.toml", "rb") as f:
+        metadata = pyproject_metadata.StandardMetadata.from_pyproject(tomllib.load(f))
+    core_metadata = metadata.as_json()
+    assert core_metadata == {
+        "sbom_file": [
+            "bom.json",
+            "sboms/newbom.json",
+        ],
+        "metadata_version": "2.5",
+        "name": "test-sbom",
+        "version": "0.1.0",
+    }
+
+
+def test_as_rfc822_sbom(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.chdir(DIR / "packages/sbom")
+
+    with open("pyproject.toml", "rb") as f:
+        metadata = pyproject_metadata.StandardMetadata.from_pyproject(tomllib.load(f))
+    core_metadata = metadata.as_rfc822()
+    assert core_metadata.items() == [
+        ("Metadata-Version", "2.5"),
+        ("Name", "test-sbom"),
+        ("Version", "0.1.0"),
+        ("Sbom-File", "bom.json"),
+        ("Sbom-File", "sboms/newbom.json"),
+    ]
+
+    assert core_metadata.get_payload() is None
+
+
 def test_as_rfc822_dynamic(monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.chdir(DIR / "packages/dynamic-description")