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// 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.worker;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.sandbox.SandboxHelpers.SandboxInputs;
import com.google.devtools.build.lib.sandbox.SandboxHelpers.SandboxOutputs;
import com.google.devtools.build.lib.testutil.TestUtils;
import com.google.devtools.build.lib.vfs.FileSystem;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
import java.io.IOException;
import java.nio.charset.Charset;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link WorkerExecRoot}. */
@RunWith(JUnit4.class)
public class WorkerExecRootTest {
private FileSystem fileSystem;
private Path testRoot;
private Path workspaceDir;
private Path sandboxDir;
private Path execRoot;
@Before
public final void setupTestDirs() throws IOException {
fileSystem = new InMemoryFileSystem();
testRoot = fileSystem.getPath(TestUtils.tmpDir());
testRoot.createDirectoryAndParents();
workspaceDir = testRoot.getRelative("workspace");
workspaceDir.createDirectory();
sandboxDir = testRoot.getRelative("sandbox");
sandboxDir.createDirectory();
execRoot = sandboxDir.getRelative("execroot");
execRoot.createDirectory();
}
@Test
public void cleanFileSystem() throws Exception {
Path workerSh = workspaceDir.getRelative("worker.sh");
FileSystemUtils.writeContentAsLatin1(workerSh, "#!/bin/bash");
WorkerExecRoot workerExecRoot =
new WorkerExecRoot(
execRoot,
new SandboxInputs(
ImmutableMap.of(PathFragment.create("worker.sh"), workerSh), ImmutableMap.of()),
SandboxOutputs.create(
ImmutableSet.of(PathFragment.create("very/output.txt")), ImmutableSet.of()),
ImmutableSet.of(PathFragment.create("worker.sh")));
workerExecRoot.createFileSystem();
// Pretend to do some work inside the execRoot.
execRoot.getRelative("tempdir").createDirectory();
FileSystemUtils.createEmptyFile(execRoot.getRelative("very/output.txt"));
FileSystemUtils.createEmptyFile(execRoot.getRelative("temp.txt"));
// Modify the worker.sh so that we're able to detect whether it gets rewritten or not.
FileSystemUtils.writeContentAsLatin1(workerSh, "#!/bin/sh");
// Reuse the same execRoot.
workerExecRoot.createFileSystem();
assertThat(execRoot.getRelative("worker.sh").exists()).isTrue();
assertThat(
FileSystemUtils.readContent(
execRoot.getRelative("worker.sh"), Charset.defaultCharset()))
.isEqualTo("#!/bin/sh");
assertThat(execRoot.getRelative("tempdir").exists()).isFalse();
assertThat(execRoot.getRelative("very/output.txt").exists()).isFalse();
assertThat(execRoot.getRelative("temp.txt").exists()).isFalse();
}
@Test
public void createsAndCleansInputSymlinks() throws Exception {
FileSystemUtils.ensureSymbolicLink(
workspaceDir.getRelative("dir/input_symlink_1"), "old_content");
FileSystemUtils.ensureSymbolicLink(
workspaceDir.getRelative("dir/input_symlink_2"), "unchanged");
FileSystemUtils.ensureSymbolicLink(workspaceDir.getRelative("dir/input_symlink_3"), "whatever");
WorkerExecRoot workerExecRoot =
new WorkerExecRoot(
execRoot,
new SandboxInputs(
ImmutableMap.of(),
ImmutableMap.of(
PathFragment.create("dir/input_symlink_1"), PathFragment.create("new_content"),
PathFragment.create("dir/input_symlink_2"), PathFragment.create("unchanged"))),
SandboxOutputs.create(ImmutableSet.of(), ImmutableSet.of()),
ImmutableSet.of());
// This should update the `input_symlink_{1,2,3}` according to `SandboxInputs`, i.e., update the
// first/second (alternatively leave the second unchanged) and delete the third.
workerExecRoot.createFileSystem();
assertThat(execRoot.getRelative("dir/input_symlink_1").readSymbolicLink())
.isEqualTo(PathFragment.create("new_content"));
assertThat(execRoot.getRelative("dir/input_symlink_2").readSymbolicLink())
.isEqualTo(PathFragment.create("unchanged"));
assertThat(execRoot.getRelative("dir/input_symlink_3").exists()).isFalse();
}
}