provider/solver: support for duplicate direct origin dependencies with same version

src/poetry/puzzle/provider.py

@@ -612,39 +612,31 @@ class Provider:
         # An example of this is:
         #   - pypiwin32 (220); sys_platform == "win32" and python_version >= "3.6"
         #   - pypiwin32 (219); sys_platform == "win32" and python_version < "3.6"
-        #
-        # Additional care has to be taken to ensure that hidden constraints like that
-        # of source type, reference etc. are taking into consideration when duplicates
-        # are identified.
-        duplicates: dict[
-            tuple[str, str | None, str | None, str | None, str | None], list[Dependency]
-        ] = {}
+        duplicates: dict[str, list[Dependency]] = defaultdict(list)
         for dep in dependencies:
-            key = (
-                dep.complete_name,
-                dep.source_type,
-                dep.source_url,
-                dep.source_reference,
-                dep.source_subdirectory,
-            )
-            if key not in duplicates:
-                duplicates[key] = []
-            duplicates[key].append(dep)
+            duplicates[dep.complete_name].append(dep)
 
         dependencies = []
-        for key, deps in duplicates.items():
+        for dep_name, deps in duplicates.items():
             if len(deps) == 1:
                 dependencies.append(deps[0])
                 continue
 
-            extra_keys = ", ".join(k for k in key[1:] if k is not None)
-            dep_name = f"{key[0]} ({extra_keys})" if extra_keys else key[0]
-
             self.debug(f"<debug>Duplicate dependencies for {dep_name}</debug>")
 
-            deps = self._merge_dependencies_by_marker(deps)
-            deps = self._merge_dependencies_by_constraint(deps)
-
+            non_direct_origin_deps: list[Dependency] = []
+            direct_origin_deps: list[Dependency] = []
+            for dep in deps:
+                if dep.is_direct_origin():
+                    direct_origin_deps.append(dep)
+                else:
+                    non_direct_origin_deps.append(dep)
+            deps = (
+                self._merge_dependencies_by_constraint(
+                    self._merge_dependencies_by_marker(non_direct_origin_deps)
+                )
+                + direct_origin_deps
+            )
             if len(deps) == 1:
                 self.debug(f"<debug>Merging requirements for {deps[0]!s}</debug>")
                 dependencies.append(deps[0])

tests/puzzle/test_provider.py

@@ -514,27 +514,25 @@ def test_search_for_file_wheel_with_extras(provider: Provider):
     }
 
 
-def test_complete_package_preserves_source_type(provider: Provider) -> None:
+def test_complete_package_preserves_source_type(
+    provider: Provider, root: ProjectPackage
+) -> None:
     fixtures = Path(__file__).parent.parent / "fixtures"
     project_dir = fixtures.joinpath("with_conditional_path_deps")
-    poetry = Factory().create_poetry(cwd=project_dir)
+    for folder in ["demo_one", "demo_two"]:
+        path = (project_dir / folder).as_posix()
+        root.add_dependency(Factory.create_dependency("demo", {"path": path}))
 
     complete_package = provider.complete_package(
-        DependencyPackage(poetry.package.to_dependency(), poetry.package)
+        DependencyPackage(root.to_dependency(), root)
     )
 
     requires = complete_package.package.all_requires
-
     assert len(requires) == 2
-
     assert {requires[0].source_url, requires[1].source_url} == {
         project_dir.joinpath("demo_one").as_posix(),
         project_dir.joinpath("demo_two").as_posix(),
     }
-    assert {str(requires[0].marker), str(requires[1].marker)} == {
-        'sys_platform == "linux"',
-        'sys_platform == "win32"',
-    }
 
 
 def test_complete_package_preserves_source_type_with_subdirectories(
@@ -545,7 +543,6 @@ def test_complete_package_preserves_source_type_with_subdirectories(
         {
             "git": "https://github.com/demo/subdirectories.git",
             "subdirectory": "one",
-            "platform": "linux",
         },
     )
     dependency_one_copy = Factory.create_dependency(
@@ -553,7 +550,6 @@ def test_complete_package_preserves_source_type_with_subdirectories(
         {
             "git": "https://github.com/demo/subdirectories.git",
             "subdirectory": "one-copy",
-            "platform": "win32",
         },
     )
     dependency_two = Factory.create_dependency(
@@ -567,7 +563,6 @@ def test_complete_package_preserves_source_type_with_subdirectories(
             {
                 "git": "https://github.com/demo/subdirectories.git",
                 "subdirectory": "one",
-                "platform": "linux",
             },
         )
     )

tests/puzzle/test_solver.py

@@ -1418,7 +1418,7 @@ def test_solver_duplicate_dependencies_different_sources_types_are_preserved(
 
     assert len(complete_package.all_requires) == 2
 
-    git, pypi = complete_package.all_requires
+    pypi, git = complete_package.all_requires
 
     assert isinstance(pypi, Dependency)
     assert pypi == dependency_pypi
@@ -1632,6 +1632,63 @@ def test_solver_duplicate_dependencies_sub_dependencies(
     )
 
 
+def test_duplicate_path_dependencies(solver: Solver, package: ProjectPackage) -> None:
+    solver.provider.set_package_python_versions("^3.7")
+    fixtures = Path(__file__).parent.parent / "fixtures"
+    project_dir = fixtures / "with_conditional_path_deps"
+
+    path1 = (project_dir / "demo_one").as_posix()
+    demo1 = Package("demo", "1.2.3", source_type="directory", source_url=path1)
+    package.add_dependency(
+        Factory.create_dependency(
+            "demo", {"path": path1, "markers": "sys_platform == 'linux'"}
+        )
+    )
+
+    path2 = (project_dir / "demo_two").as_posix()
+    demo2 = Package("demo", "1.2.3", source_type="directory", source_url=path2)
+    package.add_dependency(
+        Factory.create_dependency(
+            "demo", {"path": path2, "markers": "sys_platform == 'win32'"}
+        )
+    )
+
+    transaction = solver.solve()
+
+    check_solver_result(
+        transaction,
+        [
+            {"job": "install", "package": demo1},
+            {"job": "install", "package": demo2},
+        ],
+    )
+
+
+def test_duplicate_path_dependencies_same_path(
+    solver: Solver, package: ProjectPackage
+) -> None:
+    solver.provider.set_package_python_versions("^3.7")
+    fixtures = Path(__file__).parent.parent / "fixtures"
+    project_dir = fixtures / "with_conditional_path_deps"
+
+    path1 = (project_dir / "demo_one").as_posix()
+    demo1 = Package("demo", "1.2.3", source_type="directory", source_url=path1)
+    package.add_dependency(
+        Factory.create_dependency(
+            "demo", {"path": path1, "markers": "sys_platform == 'linux'"}
+        )
+    )
+    package.add_dependency(
+        Factory.create_dependency(
+            "demo", {"path": path1, "markers": "sys_platform == 'win32'"}
+        )
+    )
+
+    transaction = solver.solve()
+
+    check_solver_result(transaction, [{"job": "install", "package": demo1}])
+
+
 def test_solver_fails_if_dependency_name_does_not_match_package(
     solver: Solver, repo: Repository, package: ProjectPackage
 ):