[datasets] Make the site_data_base path optional.

compiler_gym/datasets/dataset.py

@@ -45,7 +45,7 @@ def __init__(
         name: str,
         description: str,
         license: str,  # pylint: disable=redefined-builtin
-        site_data_base: Path,
+        site_data_base: Optional[Path] = None,
         benchmark_class=Benchmark,
         references: Optional[Dict[str, str]] = None,
         deprecated: Optional[str] = None,
@@ -61,8 +61,15 @@ def __init__(
 
         :param license: The name of the dataset's license.
 
-        :param site_data_base: The base path of a directory that will be used to
-            store installed files.
+        :param site_data_base: An optional directory that can be used by the
+            dataset to house the "site data", i.e. persistent files on disk. The
+            site data directory is a subdirectory of this :code:`site_data_base`
+            path, which can be shared by multiple datasets. If not provided, the
+            :attr:`dataset.site_data_path
+            <compiler_gym.datasets.Dataset.site_data_path>` attribute will raise
+            an error. Use :attr:`dataset.has_site_data
+            <compiler_gym.datasets.Dataset.has_site_data>` to check if a site
+            data path was set.
 
         :param benchmark_class: The class to use when instantiating benchmarks.
             It must have the same constructor signature as :class:`Benchmark
@@ -110,8 +117,11 @@ def __init__(
         self.benchmark_class = benchmark_class
 
         # Set up the site data name.
-        basename = components.group("dataset_name")
-        self._site_data_path = Path(site_data_base).resolve() / self.protocol / basename
+        if site_data_base:
+            basename = components.group("dataset_name")
+            self._site_data_path = (
+                Path(site_data_base).resolve() / self.protocol / basename
+            )
 
     def __repr__(self):
         return self.name
@@ -212,14 +222,27 @@ def validatable(self) -> str:
         """
         return self._validatable
 
+    @property
+    def has_site_data(self) -> bool:
+        """Return whether the dataset has a site data directory.
+
+        :type: bool
+        """
+        return hasattr(self, "_site_data_path")
+
     @property
     def site_data_path(self) -> Path:
         """The filesystem path used to store persistent dataset files.
 
         This directory may not exist.
 
         :type: Path
+
+        :raises ValueError: If no site data path was specified at constructor
+            time.
         """
+        if not self.has_site_data:
+            raise ValueError(f"Dataset has no site data path: {self.name}")
         return self._site_data_path
 
     @property
@@ -228,6 +251,9 @@ def site_data_size_in_bytes(self) -> int:
 
         :type: int
         """
+        if not self.has_site_data:
+            return 0
+
         if not self.site_data_path.is_dir():
             return 0
 
@@ -314,7 +340,7 @@ def uninstall(self) -> None:
         <compiler_gym.datasets.Dataset.install>`. The dataset can still be used
         after calling this method.
         """
-        if self.site_data_path.is_dir():
+        if self.has_site_data() and self.site_data_path.is_dir():
             shutil.rmtree(self.site_data_path)
 
     def benchmarks(self) -> Iterable[Benchmark]:

compiler_gym/envs/loop_tool/__init__.py

@@ -9,7 +9,7 @@
 from compiler_gym.datasets import Benchmark, Dataset, benchmark
 from compiler_gym.spaces import Reward
 from compiler_gym.util.registration import register
-from compiler_gym.util.runfiles_path import runfiles_path, site_data_path
+from compiler_gym.util.runfiles_path import runfiles_path
 
 LOOP_TOOL_SERVICE_BINARY: Path = runfiles_path(
     "compiler_gym/envs/loop_tool/service/compiler_gym-loop_tool-service"
@@ -56,7 +56,6 @@ def __init__(self, *args, **kwargs):
             name="benchmark://loop_tool-cuda-v0",
             license="MIT",
             description="loop_tool dataset",
-            site_data_base=site_data_path("loop_tool_dataset"),
         )
 
     def benchmark_uris(self) -> Iterable[str]:
@@ -72,7 +71,6 @@ def __init__(self, *args, **kwargs):
             name="benchmark://loop_tool-cpu-v0",
             license="MIT",
             description="loop_tool dataset",
-            site_data_base=site_data_path("loop_tool_dataset"),
         )
 
     def benchmark_uris(self) -> Iterable[str]:

examples/example_compiler_gym_service/__init__.py

@@ -9,7 +9,7 @@
 from compiler_gym.datasets import Benchmark, Dataset
 from compiler_gym.spaces import Reward
 from compiler_gym.util.registration import register
-from compiler_gym.util.runfiles_path import runfiles_path, site_data_path
+from compiler_gym.util.runfiles_path import runfiles_path
 
 EXAMPLE_CC_SERVICE_BINARY: Path = runfiles_path(
     "examples/example_compiler_gym_service/service_cc/compiler_gym-example-service-cc"
@@ -58,7 +58,6 @@ def __init__(self, *args, **kwargs):
             name="benchmark://example-v0",
             license="MIT",
             description="An example dataset",
-            site_data_base=site_data_path("example_dataset"),
         )
         self._benchmarks = {
             "benchmark://example-v0/foo": Benchmark.from_file_contents(

examples/example_compiler_gym_service/demo_without_bazel.py

@@ -19,7 +19,6 @@
 from compiler_gym.spaces import Reward
 from compiler_gym.util.logging import init_logging
 from compiler_gym.util.registration import register
-from compiler_gym.util.runfiles_path import site_data_path
 
 EXAMPLE_PY_SERVICE_BINARY: Path = Path(
     "example_compiler_gym_service/service_py/example_service.py"
@@ -65,7 +64,6 @@ def __init__(self, *args, **kwargs):
             name="benchmark://example-v0",
             license="MIT",
             description="An example dataset",
-            site_data_base=site_data_path("example_dataset"),
         )
         self._benchmarks = {
             "benchmark://example-v0/foo": Benchmark.from_file_contents(

tests/datasets/dataset_test.py

@@ -243,5 +243,30 @@ def test_logger_is_deprecated():
         dataset.logger
 
 
+def test_with_site_data():
+    """Test the dataset property values."""
+    dataset = Dataset(
+        name="benchmark://test-v0",
+        description="A test dataset",
+        license="MIT",
+        site_data_base="test",
+    )
+    assert dataset.has_site_data
+
+
+def test_without_site_data():
+    """Test the dataset property values."""
+    dataset = Dataset(
+        name="benchmark://test-v0",
+        description="A test dataset",
+        license="MIT",
+    )
+    assert not dataset.has_site_data
+    with pytest.raises(
+        ValueError, match=r"^Dataset has no site data path: benchmark://test-v0$"
+    ):
+        dataset.site_data_path  # noqa
+
+
 if __name__ == "__main__":
     main()