implement py_runtime rule

* A user can use the py_runtime by `--python_top` flag, where the py_runtime can contain either:
  + an absolute path of a Python interpreter
  + a checked-in Python interpreter

* A user can also use `--python_path` to point to a Python interpreter in an absolute path directly.

PiperOrigin-RevId: 160901921

1 files changed, 163 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/bazel/rules/python/BazelPyRuntimeTest.java b/src/test/java/com/google/devtools/build/lib/bazel/rules/python/BazelPyRuntimeTest.java
new file mode 100644
index 0000000000..1a7d460ed0
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/bazel/rules/python/BazelPyRuntimeTest.java
@@ -0,0 +1,163 @@
+// Copyright 2017 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.bazel.rules.python;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.devtools.build.lib.actions.util.ActionsTestUtil;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/**
+ * Unit tests for {@link BazelPyRuntime}.
+ */
+@RunWith(JUnit4.class)
+public final class BazelPyRuntimeTest extends BuildViewTestCase {
+
+  @Rule
+  public ExpectedException thrown = ExpectedException.none();
+
+  @Before
+  public final void setup() throws Exception {
+    scratch.file(
+      "py/BUILD",
+        "py_runtime(",
+        "    name='py-2.7',",
+        "    files = [",
+        "        'py-2.7/bin/python',",
+        "        'py-2.7/lib/libpython2.7.a',",
+        "     ],",
+        "    interpreter='py-2.7/bin/python',",
+        ")",
+        "",
+        "py_runtime(",
+        "    name='py-3.6',",
+        "    files = [],",
+        "    interpreter_path='/opt/pyenv/versions/3.6.0/bin/python',",
+        ")",
+        "",
+        "py_runtime(",
+        "    name='err-interpreter-and-path-both-set',",
+        "    files = [],",
+        "    interpreter='py-2.7/bin/python',",
+        "    interpreter_path='/opt/pyenv/versions/3.6.0/bin/python',",
+        ")",
+        "",
+        "py_runtime(",
+        "    name='err-interpreter-and-path-both-unset',",
+        "    files = [],",
+        ")",
+        "",
+        "py_runtime(",
+        "    name='err-path-not-absolute',",
+        "    files = [],",
+        "    interpreter_path='py-2.7/bin/python',",
+        ")",
+        "",
+        "py_runtime(",
+        "    name='err-non-empty-files-with-path-absolute',",
+        "    files = [",
+        "        'py-err/bin/python',",
+        "        'py-err/lib/libpython2.7.a',",
+        "     ],",
+        "    interpreter_path='/opt/pyenv/versions/3.6.0/bin/python',",
+        ")"
+    );
+
+  }
+
+  @Test
+  public void testCheckedInPyRuntime() throws Exception {
+    useConfiguration("--python_top=//py:py-2.7");
+    ConfiguredTarget target = getConfiguredTarget("//py:py-2.7");
+
+    assertThat(
+        ActionsTestUtil.prettyArtifactNames(
+            target.getProvider(BazelPyRuntimeProvider.class).files()))
+        .containsExactly("py/py-2.7/bin/python", "py/py-2.7/lib/libpython2.7.a");
+    assertThat(
+            target.getProvider(BazelPyRuntimeProvider.class).interpreter().getExecPathString())
+        .isEqualTo("py/py-2.7/bin/python");
+    assertThat(target.getProvider(BazelPyRuntimeProvider.class).interpreterPath())
+        .isEqualTo("");
+  }
+
+  @Test
+  public void testAbsolutePathPyRuntime() throws Exception {
+    useConfiguration("--python_top=//py:py-3.6");
+    ConfiguredTarget target = getConfiguredTarget("//py:py-3.6");
+
+    assertThat(
+        ActionsTestUtil.prettyArtifactNames(
+            target.getProvider(BazelPyRuntimeProvider.class).files()))
+        .isEmpty();
+    assertThat(
+        target.getProvider(BazelPyRuntimeProvider.class).interpreter())
+        .isNull();
+    assertThat(target.getProvider(BazelPyRuntimeProvider.class).interpreterPath())
+        .isEqualTo("/opt/pyenv/versions/3.6.0/bin/python");
+  }
+
+  @Test
+  public void testErrorWithInterpreterAndPathBothSet() throws Exception {
+    useConfiguration("--python_top=//py:err-interpreter-and-path-both-set");
+    try {
+      getConfiguredTarget("//py:err-interpreter-and-path-both-set");
+    } catch (Error e) {
+      assertThat(e.getMessage())
+          .contains("interpreter and interpreter_path cannot be set at the same time.");
+    }
+  }
+
+  @Test
+  public void testErrorWithInterpreterAndPathBothUnset() throws Exception {
+    useConfiguration("--python_top=//py:err-interpreter-and-path-both-unset");
+    try {
+      getConfiguredTarget("//py:err-interpreter-and-path-both-unset");
+    } catch (Error e) {
+      assertThat(e.getMessage())
+          .contains("interpreter and interpreter_path cannot be empty at the same time.");
+    }
+  }
+
+  @Test
+  public void testErrorWithPathNotAbsolute() throws Exception {
+    useConfiguration("--python_top=//py:err-path-not-absolute");
+    try {
+      getConfiguredTarget("//py:err-path-not-absolute");
+    } catch (Error e) {
+      assertThat(e.getMessage())
+          .contains("must be an absolute path.");
+    }
+  }
+
+  @Test
+  public void testPyRuntimeWithError() throws Exception {
+    useConfiguration("--python_top=//py:err-non-empty-files-with-path-absolute");
+    try {
+      getConfiguredTarget("//py:err-non-empty-files-with-path-absolute");
+    } catch (Error e) {
+      assertThat(e.getMessage())
+          .contains("interpreter with an absolute path requires files to be empty.");
+    }
+  }
+
+}