Create a stub for an OSS version of MockPythonSupport

This is needed to open source unit tests for Python rules.

Work towards #1446 and other Python-related items.

RELNOTES: None
PiperOrigin-RevId: 212474035

src/test/java/com/google/devtools/build/lib/analysis/mock/BazelAnalysisMock.java

@@ -24,7 +24,9 @@
 import com.google.devtools.build.lib.bazel.rules.BazelRuleClassProvider.StrictActionEnvOptions;
 import com.google.devtools.build.lib.bazel.rules.python.BazelPythonConfiguration;
 import com.google.devtools.build.lib.packages.util.BazelMockCcSupport;
+import com.google.devtools.build.lib.packages.util.BazelMockPythonSupport;
 import com.google.devtools.build.lib.packages.util.MockCcSupport;
+import com.google.devtools.build.lib.packages.util.MockPythonSupport;
 import com.google.devtools.build.lib.packages.util.MockToolsConfig;
 import com.google.devtools.build.lib.rules.android.AndroidConfiguration;
 import com.google.devtools.build.lib.rules.apple.AppleConfiguration;
@@ -197,6 +199,7 @@ public void setupMockClient(MockToolsConfig config) throws IOException {
     config.create("/bazel_tools_workspace/objcproto/well_known_type.proto");
 
     ccSupport().setup(config);
+    pySupport().setup(config);
   }
 
   /** Contents of {@code //tools/android/emulator/BUILD.tools}. */
@@ -334,4 +337,9 @@ public boolean isThisBazel() {
   public MockCcSupport ccSupport() {
     return BazelMockCcSupport.INSTANCE;
   }
+
+  @Override
+  public MockPythonSupport pySupport() {
+    return BazelMockPythonSupport.INSTANCE;
+  }
 }

src/test/java/com/google/devtools/build/lib/analysis/util/AnalysisMock.java

@@ -24,6 +24,7 @@
 import com.google.devtools.build.lib.bazel.rules.android.AndroidSdkRepositoryRule;
 import com.google.devtools.build.lib.packages.util.LoadingMock;
 import com.google.devtools.build.lib.packages.util.MockCcSupport;
+import com.google.devtools.build.lib.packages.util.MockPythonSupport;
 import com.google.devtools.build.lib.packages.util.MockToolsConfig;
 import com.google.devtools.build.lib.rules.cpp.CcSkyframeSupportValue;
 import com.google.devtools.build.lib.rules.cpp.CcSupportFunction;
@@ -114,6 +115,8 @@ public String getDefaultsPackageContent() {
 
   public abstract MockCcSupport ccSupport();
 
+  public abstract MockPythonSupport pySupport();
+
   public void setupCcSupport(MockToolsConfig config) throws IOException {
     get().ccSupport().setup(config);
   }
@@ -183,6 +186,11 @@ public MockCcSupport ccSupport() {
       return delegate.ccSupport();
     }
 
+    @Override
+    public MockPythonSupport pySupport() {
+      return delegate.pySupport();
+    }
+
     @Override
     public Collection<String> getOptionOverrides() {
       return delegate.getOptionOverrides();

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

@@ -0,0 +1,28 @@
+// Copyright 2018 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.packages.util;
+
+import java.io.IOException;
+
+/** Mock python support in Bazel. */
+public class BazelMockPythonSupport extends MockPythonSupport {
+
+  public static final BazelMockPythonSupport INSTANCE = new BazelMockPythonSupport();
+
+  @Override
+  public void setup(MockToolsConfig config) throws IOException {
+
+  }
+}

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

@@ -0,0 +1,26 @@
+// Copyright 2018 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.packages.util;
+
+import java.io.IOException;
+
+/**
+ * Creates mock BUILD files required for the python rules.
+ */
+public abstract class MockPythonSupport {
+
+  /** Setup the support for building Python. */
+  public abstract void setup(MockToolsConfig config) throws IOException;
+}