chooser: prefer files that are not yanked

src/poetry/installation/chooser.py

@@ -198,8 +198,7 @@ def _sort_key(
 
         has_allowed_hash = int(self._is_link_hash_allowed_for_package(link, package))
 
-        # TODO: Proper yank value
-        yank_value = 0
+        yank_value = int(not link.yanked)
 
         return (
             has_allowed_hash,

tests/installation/test_chooser.py

@@ -90,6 +90,26 @@ def callback(
     )
 
 
+@pytest.fixture()
+def mock_legacy_partial_yank(http: type[httpretty.httpretty]) -> None:
+    def callback(
+        request: HTTPrettyRequest, uri: str, headers: dict[str, Any]
+    ) -> list[int | dict[str, Any] | str]:
+        parts = uri.rsplit("/")
+        name = parts[-2]
+
+        fixture = LEGACY_FIXTURES / (name + "_partial_yank" + ".html")
+
+        with fixture.open(encoding="utf-8") as f:
+            return [200, headers, f.read()]
+
+    http.register_uri(
+        http.GET,
+        re.compile("^https://foo2.bar/simple/(.+?)$"),
+        body=callback,
+    )
+
+
 @pytest.fixture()
 def pool() -> Pool:
     pool = Pool()
@@ -98,6 +118,9 @@ def pool() -> Pool:
     pool.add_repository(
         LegacyRepository("foo", "https://foo.bar/simple/", disable_cache=True)
     )
+    pool.add_repository(
+        LegacyRepository("foo2", "https://foo2.bar/simple/", disable_cache=True)
+    )
 
     return pool
 
@@ -266,6 +289,83 @@ def test_chooser_chooses_distributions_that_match_the_package_hashes(
     assert link.filename == "isort-4.3.4.tar.gz"
 
 
+@pytest.mark.parametrize("source_type", ["", "legacy"])
+def test_chooser_chooses_yanked_if_no_others(
+    env: MockEnv,
+    mock_pypi: None,
+    mock_legacy: None,
+    source_type: str,
+    pool: Pool,
+) -> None:
+    chooser = Chooser(pool, env)
+
+    package = Package("black", "21.11b0")
+    files = [
+        {
+            "filename": "black-21.11b0-py3-none-any.whl",
+            "hash": "sha256:0b1f66cbfadcd332ceeaeecf6373d9991d451868d2e2219ad0ac1213fb701117",  # noqa: E501
+        }
+    ]
+    if source_type == "legacy":
+        package = Package(
+            package.name,
+            package.version.text,
+            source_type="legacy",
+            source_reference="foo",
+            source_url="https://foo.bar/simple/",
+        )
+
+    package.files = files
+
+    link = chooser.choose_for(package)
+
+    assert link.filename == "black-21.11b0-py3-none-any.whl"
+    assert link.yanked
+
+
+def test_chooser_does_not_choose_yanked_if_others(
+    mock_legacy: None,
+    mock_legacy_partial_yank: None,
+    pool: Pool,
+) -> None:
+    chooser = Chooser(pool, MockEnv(supported_tags=[Tag("py2", "none", "any")]))
+
+    package = Package("futures", "3.2.0")
+    files = [
+        {
+            "filename": "futures-3.2.0-py2-none-any.whl",
+            "hash": "sha256:ec0a6cb848cc212002b9828c3e34c675e0c9ff6741dc445cab6fdd4e1085d1f1",  # noqa: E501
+        },
+        {
+            "filename": "futures-3.2.0.tar.gz",
+            "hash": "sha256:9ec02aa7d674acb8618afb127e27fde7fc68994c0437ad759fa094a574adb265",  # noqa: E501
+        },
+    ]
+    package = Package(
+        package.name,
+        package.version.text,
+        source_type="legacy",
+        source_reference="foo",
+        source_url="https://foo.bar/simple/",
+    )
+    package_partial_yank = Package(
+        package.name,
+        package.version.text,
+        source_type="legacy",
+        source_reference="foo2",
+        source_url="https://foo2.bar/simple/",
+    )
+
+    package.files = files
+    package_partial_yank.files = files
+
+    link = chooser.choose_for(package)
+    link_partial_yank = chooser.choose_for(package_partial_yank)
+
+    assert link.filename == "futures-3.2.0-py2-none-any.whl"
+    assert link_partial_yank.filename == "futures-3.2.0.tar.gz"
+
+
 @pytest.mark.parametrize("source_type", ["", "legacy"])
 def test_chooser_throws_an_error_if_package_hashes_do_not_match(
     env: MockEnv,