Fix annotations_test on windows systems that don't support symlinks (#665)

Author: UebelAndre

python/pip_install/extract_wheels/lib/BUILD

@@ -34,13 +34,15 @@ package_annotations_file(
             ],
         ),
         "pkg_c": package_annotation(
-            additive_build_content = """\
+            # The `join` and `strip` here accounts for potential differences
+            # in new lines between unix and windows hosts.
+            additive_build_content = "\n".join([line.strip() for line in """\
 cc_library(
     name = "my_target",
     hdrs = glob(["**/*.h"]),
     srcs = glob(["**/*.cc"]),
 )
-""",
+""".splitlines()]),
             data = [":my_target"],
         ),
         "pkg_d": package_annotation(
@@ -57,7 +59,10 @@ py_test(
     data = [":mock_annotations"],
     env = {"MOCK_ANNOTATIONS": "$(rootpath :mock_annotations)"},
     tags = ["unit"],
-    deps = [":lib"],
+    deps = [
+        ":lib",
+        "//python/runfiles",
+    ],
 )
 
 py_test(

python/pip_install/extract_wheels/lib/annotations_test.py

@@ -6,6 +6,7 @@
 from pathlib import Path
 
 from python.pip_install.extract_wheels.lib.annotation import Annotation, AnnotationsMap
+from python.runfiles import runfiles
 
 
 class AnnotationsTestCase(unittest.TestCase):
@@ -16,7 +17,9 @@ def test_annotations_constructor(self) -> None:
         annotations_env = os.environ.get("MOCK_ANNOTATIONS")
         self.assertIsNotNone(annotations_env)
 
-        annotations_path = Path.cwd() / annotations_env
+        r = runfiles.Create()
+
+        annotations_path = Path(r.Rlocation("rules_python/{}".format(annotations_env)))
         self.assertTrue(annotations_path.exists())
 
         annotations_map = AnnotationsMap(annotations_path)
@@ -59,14 +62,22 @@ def test_annotations_constructor(self) -> None:
             collection["pkg_c"],
             Annotation(
                 {
-                    "additive_build_content": textwrap.dedent(
-                        """\
+                    # The `join` and `strip` here accounts for potential
+                    # differences in new lines between unix and windows
+                    # hosts.
+                    "additive_build_content": "\n".join(
+                        [
+                            line.strip()
+                            for line in textwrap.dedent(
+                                """\
                 cc_library(
                     name = "my_target",
                     hdrs = glob(["**/*.h"]),
                     srcs = glob(["**/*.cc"]),
                 )
                 """
+                            ).splitlines()
+                        ]
                     ),
                     "copy_executables": {},
                     "copy_files": {},