Normalize directory/file dependency paths

poetry/packages/directory_dependency.py

@@ -121,7 +121,7 @@ class DirectoryDependency(Dependency):
             self._package = package
 
         self._package.source_type = "directory"
-        self._package.source_url = str(self._path)
+        self._package.source_url = self._path.as_posix()
 
         super(DirectoryDependency, self).__init__(
             self._package.name,

poetry/puzzle/provider.py

@@ -230,7 +230,7 @@ class Provider:
     def search_for_file(self, dependency):  # type: (FileDependency) -> List[Package]
         package = Package(dependency.name, dependency.pretty_constraint)
         package.source_type = "file"
-        package.source_url = str(dependency.path)
+        package.source_url = dependency.path.as_posix()
 
         package.description = dependency.metadata.summary
         for req in dependency.metadata.requires_dist: