| // 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.exec.local; |
| |
| import com.google.common.base.Strings; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Maps; |
| import com.google.devtools.build.lib.exec.BinTools; |
| import java.util.Map; |
| |
| /** {@link LocalEnvProvider} implementation for actions running on Unix-like platforms. */ |
| public final class PosixLocalEnvProvider implements LocalEnvProvider { |
| private final Map<String, String> clientEnv; |
| |
| /** |
| * Create a new {@link PosixLocalEnvProvider}. |
| * |
| * <p>Use {@link LocalEnvProvider#forCurrentOs(Map)} to instantiate this unless the calling code |
| * is platform-specific. |
| * |
| * @param clientEnv a map of the current Bazel command's environment |
| */ |
| public PosixLocalEnvProvider(Map<String, String> clientEnv) { |
| this.clientEnv = clientEnv; |
| } |
| |
| /** |
| * Compute an environment map for local actions on Unix-like platforms (e.g. Linux, macOS). |
| * |
| * <p>Returns a map with the same keys and values as {@code env}. Overrides the value of TMPDIR |
| * (or adds it if not present in {@code env}) by the value of {@code clientEnv.get("TMPDIR")}, or |
| * if that's empty or null, then by "/tmp". |
| */ |
| @Override |
| public Map<String, String> rewriteLocalEnv( |
| Map<String, String> env, BinTools binTools, String fallbackTmpDir) { |
| ImmutableMap.Builder<String, String> result = ImmutableMap.builder(); |
| result.putAll(Maps.filterKeys(env, k -> !k.equals("TMPDIR"))); |
| String p = clientEnv.get("TMPDIR"); |
| if (Strings.isNullOrEmpty(p)) { |
| // Do not use `fallbackTmpDir`, use `/tmp` instead. This way if the user didn't export TMPDIR |
| // in their environment, Bazel will still set a TMPDIR that's Posixy enough and plays well |
| // with heavily path-length-limited scenarios, such as the socket creation scenario that |
| // motivated https://github.com/bazelbuild/bazel/issues/4376. |
| p = "/tmp"; |
| } |
| result.put("TMPDIR", p); |
| return result.build(); |
| } |
| } |