fix(packages/dependency): add space after filename for file dependenc…

…ies with markers

local vendored files need a space after the file name and before the ";" which demarks the start of
markers

fix #3872

poetry/core/packages/dependency.py

@@ -262,7 +262,7 @@ def to_pep_508(self, with_extras: bool = True) -> str:
             )
 
         if markers:
-            if self.is_vcs() or self.is_url():
+            if self.is_vcs() or self.is_url() or self.is_file():
                 requirement += " "
 
             if len(markers) > 1:

tests/packages/test_file_dependency.py

@@ -4,6 +4,7 @@
 
 from poetry.core.packages.dependency import Dependency
 from poetry.core.packages.file_dependency import FileDependency
+from poetry.core.version.markers import SingleMarker
 
 
 DIST_PATH = Path(__file__).parent.parent / "fixtures" / "distributions"
@@ -20,14 +21,16 @@ def test_file_dependency_dir():
 
 
 def _test_file_dependency_pep_508(
-    mocker, name, path, pep_508_input, pep_508_output=None
+    mocker, name, path, pep_508_input, pep_508_output=None, marker=None
 ):
     mocker.patch.object(Path, "exists").return_value = True
     mocker.patch.object(Path, "is_file").return_value = True
 
     dep = Dependency.create_from_pep_508(
         pep_508_input, relative_to=Path(__file__).parent
     )
+    if marker:
+        dep.marker = marker
 
     assert dep.is_file()
     assert dep.name == name
@@ -62,3 +65,20 @@ def test_file_dependency_pep_508_local_file_relative_path(mocker):
 
     requirement = "{} @ {}".format("demo", path)
     _test_file_dependency_pep_508(mocker, "demo", path, requirement)
+
+
+def test_to_pep_508_with_marker(mocker):
+    wheel = "demo-0.1.0-py2.py3-none-any.whl"
+
+    def _dep_with_marker(path):
+        dependency = FileDependency("demo", path, base=Path(__file__).parent)
+        dependency.marker = SingleMarker("sys.platform", "linux")
+        return dependency
+
+    abs_path = DIST_PATH / wheel
+    expected = '{} @ file://{} ; sys_platform == "linux"'.format("demo", abs_path)
+    assert expected == _dep_with_marker(abs_path).to_pep_508()
+
+    rel_path = Path("..") / "fixtures" / "distributions" / wheel
+    expected = '{} @ {} ; sys_platform == "linux"'.format("demo", rel_path)
+    assert expected == _dep_with_marker(rel_path).to_pep_508()