| // Copyright 2023 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.bzlmod; |
| |
| import static com.google.devtools.build.lib.bazel.bzlmod.GsonTypeAdapterUtil.LOCKFILE_GSON; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.devtools.build.lib.actions.FileValue; |
| import com.google.devtools.build.lib.bazel.repository.RepositoryOptions.LockfileMode; |
| import com.google.devtools.build.lib.cmdline.LabelConstants; |
| import com.google.devtools.build.lib.server.FailureDetails.ExternalDeps.Code; |
| import com.google.devtools.build.lib.skyframe.PrecomputedValue.Precomputed; |
| import com.google.devtools.build.lib.vfs.FileSystemUtils; |
| import com.google.devtools.build.lib.vfs.Path; |
| import com.google.devtools.build.lib.vfs.Root; |
| import com.google.devtools.build.lib.vfs.RootedPath; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyFunctionException; |
| import com.google.devtools.build.skyframe.SkyFunctionException.Transience; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import com.google.gson.JsonSyntaxException; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import javax.annotation.Nullable; |
| |
| /** Reads the contents of the lock file into its value. */ |
| public class BazelLockFileFunction implements SkyFunction { |
| |
| public static final Precomputed<LockfileMode> LOCKFILE_MODE = new Precomputed<>("lockfile_mode"); |
| |
| private final Path rootDirectory; |
| |
| private static final BzlmodFlagsAndEnvVars EMPTY_FLAGS = |
| BzlmodFlagsAndEnvVars.create( |
| ImmutableList.of(), ImmutableMap.of(), ImmutableList.of(), "", false, "", ""); |
| |
| private static final BazelLockFileValue EMPTY_LOCKFILE = |
| BazelLockFileValue.builder() |
| .setLockFileVersion(BazelLockFileValue.LOCK_FILE_VERSION) |
| .setModuleFileHash("") |
| .setFlags(EMPTY_FLAGS) |
| .setLocalOverrideHashes(ImmutableMap.of()) |
| .setModuleDepGraph(ImmutableMap.of()) |
| .setModuleExtensions(ImmutableMap.of()) |
| .build(); |
| |
| public BazelLockFileFunction(Path rootDirectory) { |
| this.rootDirectory = rootDirectory; |
| } |
| |
| @Override |
| @Nullable |
| public SkyValue compute(SkyKey skyKey, Environment env) |
| throws BazelLockfileFunctionException, InterruptedException { |
| RootedPath lockfilePath = |
| RootedPath.toRootedPath(Root.fromPath(rootDirectory), LabelConstants.MODULE_LOCKFILE_NAME); |
| |
| // Add dependency on the lockfile to recognize changes to it |
| if (env.getValue(FileValue.key(lockfilePath)) == null) { |
| return null; |
| } |
| |
| try { |
| return getLockfileValue(lockfilePath); |
| } catch (IOException | JsonSyntaxException | NullPointerException e) { |
| throw new BazelLockfileFunctionException( |
| ExternalDepsException.withMessage( |
| Code.BAD_MODULE, |
| "Failed to read and parse the MODULE.bazel.lock file with error: %s." |
| + " Try deleting it and rerun the build.", |
| e.getMessage()), |
| Transience.PERSISTENT); |
| } |
| } |
| |
| public static BazelLockFileValue getLockfileValue(RootedPath lockfilePath) throws IOException { |
| BazelLockFileValue bazelLockFileValue; |
| try { |
| String json = FileSystemUtils.readContent(lockfilePath.asPath(), UTF_8); |
| bazelLockFileValue = LOCKFILE_GSON.fromJson(json, BazelLockFileValue.class); |
| } catch (FileNotFoundException e) { |
| bazelLockFileValue = EMPTY_LOCKFILE; |
| } |
| return bazelLockFileValue; |
| } |
| |
| |
| static final class BazelLockfileFunctionException extends SkyFunctionException { |
| |
| BazelLockfileFunctionException(ExternalDepsException cause, Transience transience) { |
| super(cause, transience); |
| } |
| } |
| } |