Initial checkin of Python rules into Bazel.

--
MOS_MIGRATED_REVID=89123900

1 files changed, 79 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/python/PythonConfigurationLoader.java b/src/main/java/com/google/devtools/build/lib/rules/python/PythonConfigurationLoader.java
new file mode 100644
index 0000000000..2acfe17981
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/python/PythonConfigurationLoader.java
@@ -0,0 +1,79 @@
+// Copyright 2014 Google Inc. 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.rules.python;
+
+import com.google.common.base.Function;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
+import com.google.devtools.build.lib.analysis.config.BuildOptions;
+import com.google.devtools.build.lib.analysis.config.ConfigurationEnvironment;
+import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory;
+import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
+import com.google.devtools.build.lib.rules.cpp.CppConfiguration;
+import com.google.devtools.build.lib.rules.cpp.CppOptions;
+import com.google.devtools.build.lib.rules.cpp.CrosstoolConfigurationLoader;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.lib.view.config.crosstool.CrosstoolConfig;
+
+import javax.annotation.Nullable;
+
+/**
+ * A factory implementation for {@link PythonConfiguration} objects.
+ */
+public class PythonConfigurationLoader implements ConfigurationFragmentFactory {
+  private final Function<String, String> cpuTransformer;
+
+  public PythonConfigurationLoader(Function<String, String> cpuTransformer) {
+    this.cpuTransformer = cpuTransformer;
+  }
+
+  @Nullable
+  private CrosstoolConfig.CToolchain getToolchain(
+      ConfigurationEnvironment env, BuildOptions buildOptions, Label crosstoolTop)
+      throws InvalidConfigurationException {
+    CrosstoolConfigurationLoader.CrosstoolFile file =
+        CrosstoolConfigurationLoader.readCrosstool(env, crosstoolTop);
+    if (file == null) {
+      return null;
+    }
+    return CrosstoolConfigurationLoader.selectToolchain(
+        file.getProto(), buildOptions, cpuTransformer);
+  }
+
+  @Override
+  public PythonConfiguration create(ConfigurationEnvironment env, BuildOptions buildOptions)
+      throws InvalidConfigurationException {
+    PythonOptions pythonOptions = buildOptions.get(PythonOptions.class);
+    CppConfiguration cppConfiguration = env.getFragment(buildOptions, CppConfiguration.class);
+    if (cppConfiguration == null) {
+      return null;
+    }
+
+    CrosstoolConfig.CToolchain toolchain = getToolchain(
+        env, buildOptions, buildOptions.get(CppOptions.class).crosstoolTop);
+    if (toolchain == null) {
+      return null;
+    }
+
+    boolean ignorePythonVersionAttribute = pythonOptions.forcePython != null;
+    PythonVersion pythonVersion = pythonOptions.getPythonVersion();
+
+    return new PythonConfiguration(pythonVersion, ignorePythonVersionAttribute);
+  }
+
+  @Override
+  public Class<? extends Fragment> creates() {
+    return PythonConfiguration.class;
+  }
+}
+