python: Remove PythonSemantics classes

All they contain is the GET_INIT_PY_FILES function, which is really only used
by the PyBuiltins class.

PiperOrigin-RevId: 587053249
Change-Id: Iebd9db51513029d47a5148d4855334b44d7638d4

src/main/java/com/google/devtools/build/lib/bazel/rules/python/BazelPyBuiltins.java

@@ -14,11 +14,22 @@
 
 package com.google.devtools.build.lib.bazel.rules.python;
 
+import com.google.devtools.build.lib.analysis.Runfiles;
 import com.google.devtools.build.lib.rules.python.PyBuiltins;
+import com.google.devtools.build.lib.rules.python.PythonUtils;
+import com.google.devtools.build.lib.skyframe.serialization.autocodec.SerializationConstant;
+import java.util.UUID;
 
 /** PyBuiltins with Bazel-specific functionality. */
 public final class BazelPyBuiltins extends PyBuiltins {
+
+  private static final UUID GUID = UUID.fromString("0211a192-1b1e-40e6-80e9-7352360b12b1");
+
+  @SerializationConstant
+  public static final Runfiles.EmptyFilesSupplier GET_INIT_PY_FILES =
+      new PythonUtils.GetInitPyFiles(source -> false, GUID);
+
   public BazelPyBuiltins() {
-    super(BazelPythonSemantics.GET_INIT_PY_FILES);
+    super(GET_INIT_PY_FILES);
   }
 }

src/test/java/com/google/devtools/build/lib/analysis/SourceManifestActionTest.java

@@ -117,8 +117,7 @@ private SourceManifestAction createAction(ManifestType type, boolean addInitPy)
     Runfiles.Builder builder = new Runfiles.Builder("TESTING", false);
     builder.addSymlinks(fakeManifest);
     if (addInitPy) {
-      builder.setEmptyFilesSupplier(
-          analysisMock.pySupport().getPythonSemantics().getEmptyRunfilesSupplier());
+      builder.setEmptyFilesSupplier(analysisMock.pySupport().getEmptyRunfilesSupplier());
     }
     return new SourceManifestAction(type, NULL_ACTION_OWNER, manifestOutputFile, builder.build());
   }

src/test/java/com/google/devtools/build/lib/packages/util/BazelMockPythonSupport.java

@@ -14,8 +14,8 @@
 
 package com.google.devtools.build.lib.packages.util;
 
-import com.google.devtools.build.lib.bazel.rules.python.BazelPythonSemantics;
-import com.google.devtools.build.lib.rules.python.PythonSemantics;
+import com.google.devtools.build.lib.analysis.Runfiles;
+import com.google.devtools.build.lib.bazel.rules.python.BazelPyBuiltins;
 import com.google.devtools.build.lib.testutil.TestConstants;
 import java.io.IOException;
 
@@ -85,7 +85,7 @@ public String createPythonTopEntryPoint(MockToolsConfig config, String pyRuntime
   }
 
   @Override
-  public PythonSemantics getPythonSemantics() {
-    return new BazelPythonSemantics();
+  public Runfiles.EmptyFilesSupplier getEmptyRunfilesSupplier() {
+    return BazelPyBuiltins.GET_INIT_PY_FILES;
   }
 }

src/test/java/com/google/devtools/build/lib/packages/util/MockPythonSupport.java

@@ -14,7 +14,7 @@
 
 package com.google.devtools.build.lib.packages.util;
 
-import com.google.devtools.build.lib.rules.python.PythonSemantics;
+import com.google.devtools.build.lib.analysis.Runfiles;
 import java.io.IOException;
 
 /** Creates mock BUILD files required for the python rules. */
@@ -31,5 +31,5 @@ public abstract class MockPythonSupport {
   public abstract String createPythonTopEntryPoint(MockToolsConfig config, String pyRuntimeLabel)
       throws IOException;
 
-  public abstract PythonSemantics getPythonSemantics();
+  public abstract Runfiles.EmptyFilesSupplier getEmptyRunfilesSupplier();
 }