support for file dependencies with subdirectories

src/poetry/core/factory.py

@@ -290,6 +290,7 @@ def create_dependency(
                 dependency = FileDependency(
                     name,
                     file_path,
+                    directory=constraint.get("subdirectory", None),
                     groups=groups,
                     base=root_dir,
                     extras=constraint.get("extras", []),
@@ -306,12 +307,16 @@ def create_dependency(
                     dependency = FileDependency(
                         name,
                         path,
+                        directory=constraint.get("subdirectory", None),
                         groups=groups,
                         optional=optional,
                         base=root_dir,
                         extras=constraint.get("extras", []),
                     )
                 else:
+                    subdirectory = constraint.get("subdirectory", None)
+                    if subdirectory:
+                        path = path / subdirectory
                     dependency = DirectoryDependency(
                         name,
                         path,

src/poetry/core/json/schemas/poetry-schema.json

@@ -429,6 +429,10 @@
           "type": "string",
           "description": "The path to the file."
         },
+        "subdirectory": {
+          "type": "string",
+          "description": "The relative path to the directory where the package is located."
+        },
         "python": {
           "type": "string",
           "description": "The python versions for which the dependency should be installed."
@@ -465,6 +469,10 @@
           "type": "string",
           "description": "The path to the dependency."
         },
+        "subdirectory": {
+          "type": "string",
+          "description": "The relative path to the directory where the package is located."
+        },
         "python": {
           "type": "string",
           "description": "The python versions for which the dependency should be installed."

src/poetry/core/packages/dependency.py

@@ -441,7 +441,11 @@ def create_from_pep_508(
                 # handle RFC 8089 references
                 path = url_to_path(req.url)
                 dep = _make_file_or_dir_dep(
-                    name=name, path=path, base=relative_to, extras=req.extras
+                    name=name,
+                    path=path,
+                    base=relative_to,
+                    subdirectory=link.subdirectory_fragment,
+                    extras=req.extras,
                 )
             else:
                 with suppress(ValueError):
@@ -502,6 +506,7 @@ def _make_file_or_dir_dep(
     name: str,
     path: Path,
     base: Path | None = None,
+    subdirectory: str | None = None,
     extras: list[str] | None = None,
 ) -> FileDependency | DirectoryDependency | None:
     """
@@ -517,8 +522,12 @@ def _make_file_or_dir_dep(
         _path = Path(base) / path
 
     if _path.is_file():
-        return FileDependency(name, path, base=base, extras=extras)
+        return FileDependency(
+            name, path, base=base, directory=subdirectory, extras=extras
+        )
     elif _path.is_dir():
+        if subdirectory:
+            path = path / subdirectory
         return DirectoryDependency(name, path, base=base, extras=extras)
 
     return None

src/poetry/core/packages/file_dependency.py

@@ -19,6 +19,8 @@ def __init__(
         self,
         name: str,
         path: Path,
+        *,
+        directory: str | None = None,
         groups: Iterable[str] | None = None,
         optional: bool = False,
         base: Path | None = None,
@@ -31,9 +33,23 @@ def __init__(
             groups=groups,
             optional=optional,
             base=base,
+            subdirectory=directory,
             extras=extras,
         )
 
+    @property
+    def directory(self) -> str | None:
+        return self.source_subdirectory
+
+    @property
+    def base_pep_508_name(self) -> str:
+        requirement = super().base_pep_508_name
+
+        if self.directory:
+            requirement += f"#subdirectory={self.directory}"
+
+        return requirement
+
     def _validate(self) -> str:
         message = super()._validate()
         if message:

src/poetry/core/packages/package.py

@@ -538,6 +538,7 @@ def to_dependency(self) -> Dependency:
             dep = FileDependency(
                 self._name,
                 Path(self._source_url),
+                directory=self.source_subdirectory,
                 groups=list(self._dependency_groups.keys()),
                 optional=self.optional,
                 base=self.root_dir,

src/poetry/core/packages/path_dependency.py

@@ -29,6 +29,7 @@ def __init__(
         groups: Iterable[str] | None = None,
         optional: bool = False,
         base: Path | None = None,
+        subdirectory: str | None = None,
         extras: Iterable[str] | None = None,
     ) -> None:
         assert source_type in ("file", "directory")
@@ -47,6 +48,7 @@ def __init__(
             allows_prereleases=True,
             source_type=source_type,
             source_url=self._full_path.as_posix(),
+            source_subdirectory=subdirectory,
             extras=extras,
         )
         # cache validation result to avoid unnecessary file system access

tests/fixtures/project_with_dependencies_with_subdirectory/README.rst

@@ -0,0 +1,2 @@
+My Package
+==========

tests/fixtures/project_with_dependencies_with_subdirectory/pyproject.toml

@@ -0,0 +1,40 @@
+[tool.poetry]
+name = "my-package"
+version = "1.2.3"
+description = "Some description."
+authors = [
+    "Sébastien Eustace <sebastien@eustace.io>"
+]
+license = "MIT"
+
+readme = "README.rst"
+
+homepage = "https://python-poetry.org"
+repository = "https://github.com/python-poetry/poetry"
+documentation = "https://python-poetry.org/docs"
+
+keywords = ["packaging", "dependency", "poetry"]
+
+classifiers = [
+    "Topic :: Software Development :: Build Tools",
+    "Topic :: Software Development :: Libraries :: Python Modules"
+]
+
+# Requirements
+[tool.poetry.dependencies]
+python = "^3.6"
+
+# Git dependency with subdirectory
+pendulum = { git = "https://github.com/sdispater/pendulum.git", subdirectory = "sub", branch = "2.0" }
+
+# File dependency with subdirectory
+demo = [
+    { path = "../distributions/demo-0.1.0-in-subdir.zip", subdirectory = "sub", platform = "linux" },
+    { file = "../distributions/demo-0.1.0-in-subdir.zip", subdirectory = "sub", platform = "win32" }
+]
+
+# Dir dependency with subdirectory (same as path "../simple_project" without subdirectory)
+simple-project = { path = "..", subdirectory = "simple_project" }
+
+# Url dependency with subdirectory
+foo = { url = "https://example.com/foo.zip", subdirectory = "sub" }

tests/packages/test_directory_dependency.py

@@ -119,6 +119,18 @@ def test_directory_dependency_pep_508_local_relative() -> None:
     _test_directory_dependency_pep_508("demo", path, requirement, expected)
 
 
+def test_directory_dependency_pep_508_with_subdirectory() -> None:
+    path = (
+        Path(__file__).parent.parent
+        / "fixtures"
+        / "project_with_multi_constraints_dependency"
+    )
+    expected = f"demo @ {path.as_uri()}"
+
+    requirement = f"demo @ file://{path.parent.as_posix()}#subdirectory={path.name}"
+    _test_directory_dependency_pep_508("demo", path, requirement, expected)
+
+
 def test_directory_dependency_pep_508_extras() -> None:
     path = (
         Path(__file__).parent.parent

tests/packages/test_file_dependency.py

@@ -177,7 +177,15 @@ def test_file_dependency_pep_508_local_file_relative_path(
     _test_file_dependency_pep_508(mocker, "demo", path, requirement, expected)
 
 
-def test_absolute_file_dependency_to_pep_508_with_marker(mocker: MockerFixture) -> None:
+def test_file_dependency_pep_508_with_subdirectory(mocker: MockerFixture) -> None:
+    path = DIST_PATH / "demo.zip"
+    expected = f"demo @ {path.as_uri()}#subdirectory=sub"
+
+    requirement = f"demo @ file://{path.as_posix()}#subdirectory=sub"
+    _test_file_dependency_pep_508(mocker, "demo", path, requirement, expected)
+
+
+def test_to_pep_508_with_marker(mocker: MockerFixture) -> None:
     wheel = "demo-0.1.0-py2.py3-none-any.whl"
 
     abs_path = DIST_PATH / wheel

tests/packages/test_package.py

@@ -368,6 +368,7 @@ def test_to_dependency_for_file() -> None:
         "1.2.3",
         source_type="file",
         source_url=path.as_posix(),
+        source_subdirectory="qux",
         features=["baz", "bar"],
     )
     dep = package.to_dependency()
@@ -380,6 +381,7 @@ def test_to_dependency_for_file() -> None:
     assert dep.path == path
     assert dep.source_type == "file"
     assert dep.source_url == path.as_posix()
+    assert dep.source_subdirectory == "qux"
 
 
 def test_to_dependency_for_url() -> None:

tests/test_factory.py

@@ -20,6 +20,8 @@
     from _pytest.logging import LogCaptureFixture
 
     from poetry.core.packages.dependency import Dependency
+    from poetry.core.packages.directory_dependency import DirectoryDependency
+    from poetry.core.packages.file_dependency import FileDependency
     from poetry.core.packages.vcs_dependency import VCSDependency
 
 
@@ -151,6 +153,54 @@ def test_create_poetry() -> None:
     ]
 
 
+def test_create_poetry_with_dependencies_with_subdirectory() -> None:
+    poetry = Factory().create_poetry(
+        fixtures_dir / "project_with_dependencies_with_subdirectory"
+    )
+    package = poetry.package
+    dependencies = {str(dep.name): dep for dep in package.requires}
+
+    # git dependency
+    pendulum = dependencies["pendulum"]
+    assert pendulum.is_vcs()
+    assert pendulum.pretty_constraint == "branch 2.0"
+    pendulum = cast("VCSDependency", pendulum)
+    assert pendulum.source == "https://github.com/sdispater/pendulum.git"
+    assert pendulum.directory == "sub"
+
+    # file dependency
+    demo = dependencies["demo"]
+    assert demo.is_file()
+    assert demo.pretty_constraint == "*"
+    demo = cast("FileDependency", demo)
+    assert demo.path == Path("../distributions/demo-0.1.0-in-subdir.zip")
+    assert demo.directory == "sub"
+    demo_dependencies = [dep for dep in package.requires if dep.name == "demo"]
+    assert len(demo_dependencies) == 2
+    assert demo_dependencies[0] == demo_dependencies[1]
+    assert {str(dep.marker) for dep in demo_dependencies} == {
+        'sys_platform == "win32"',
+        'sys_platform == "linux"',
+    }
+
+    # directory dependency
+    simple_project = dependencies["simple-project"]
+    assert simple_project.is_directory()
+    assert simple_project.pretty_constraint == "*"
+    simple_project = cast("DirectoryDependency", simple_project)
+    assert simple_project.path == Path("../simple_project")
+    with pytest.raises(AttributeError):
+        _ = simple_project.directory  # type: ignore[attr-defined]
+
+    # url dependency
+    foo = dependencies["foo"]
+    assert foo.is_url()
+    assert foo.pretty_constraint == "*"
+    foo = cast("URLDependency", foo)
+    assert foo.url == "https://example.com/foo.zip"
+    assert foo.directory == "sub"
+
+
 def test_create_poetry_with_packages_and_includes() -> None:
     poetry = Factory().create_poetry(
         fixtures_dir.parent / "masonry" / "builders" / "fixtures" / "with-include"