Use getdeps.py to drive build of OSS CinderX

Summary: Add a "manifest" for CinderX allowing it and its dependencies to be built and tested with `getdeps.py`. There was no pre-existing "builder" that was appropriate for building a Python extension from source, but rather than adding one that's specific to Cinderx I've tried to write a general builder that uses `setup.py` to install the build into the Python install.

Reviewed By: alexmalyshev

Differential Revision: D79287319

fbshipit-source-id: d302bea10c6a79cdedc08cd93b0362259dea522b

build/fbcode_builder/getdeps/builder.py

@@ -1368,6 +1368,46 @@ class NopBuilder(BuilderBase):
                 simple_copytree(self.src_dir, self.inst_dir)
 
 
+class SetupPyBuilder(BuilderBase):
+    def _build(self, reconfigure) -> None:
+        env = self._compute_env()
+
+        setup_py_path = os.path.join(self.src_dir, "setup.py")
+
+        if not os.path.exists(setup_py_path):
+            raise RuntimeError(f"setup.py script not found at {setup_py_path}")
+
+        self._check_cmd(
+            [path_search(env, "python3"), setup_py_path, "install"],
+            cwd=self.src_dir,
+            env=env,
+        )
+
+        # Create the installation directory if it doesn't exist
+        os.makedirs(self.inst_dir, exist_ok=True)
+
+        # Mark the project as built
+        with open(os.path.join(self.inst_dir, ".built-by-getdeps"), "w") as f:
+            f.write("built")
+
+    def run_tests(self, schedule_type, owner, test_filter, retry, no_testpilot) -> None:
+        # setup.py actually no longer has a standard command for running tests.
+        # Instead we let manifest files specify an arbitrary Python file to run
+        # as a test.
+
+        # Get the test command from the manifest
+        python_script = self.manifest.get(
+            "setup-py.test", "python_script", ctx=self.ctx
+        )
+        if not python_script:
+            print(f"No test script specified for {self.manifest.name}")
+            return
+
+        # Run the command
+        env = self._compute_env()
+        self._check_cmd(["python3", python_script], cwd=self.src_dir, env=env)
+
+
 class SqliteBuilder(BuilderBase):
     def __init__(
         self,