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// 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.analysis.config;
import com.google.devtools.build.lib.util.CPU;
import com.google.devtools.build.lib.util.OS;
import com.google.devtools.build.lib.util.Pair;
import com.google.devtools.common.options.Converter;
import com.google.devtools.common.options.OptionsParsingException;
/**
* Converter to auto-detect the cpu of the machine on which Bazel runs.
*
* <p>If the compilation happens remotely then the cpu of the remote machine might be different from
* the auto-detected one and the --cpu and --host_cpu options must be set explicitly.
*/
public class AutoCpuConverter implements Converter<String> {
@Override
public String convert(String input) throws OptionsParsingException {
if (input.isEmpty()) {
// TODO(philwo) - replace these deprecated names with more logical ones (e.g. k8 becomes
// linux-x86_64, darwin includes the CPU architecture, ...).
switch (OS.getCurrent()) {
case DARWIN:
return "darwin";
case FREEBSD:
return "freebsd";
case WINDOWS:
switch (CPU.getCurrent()) {
case X86_64:
return "x64_windows";
default:
// We only support x64 Windows for now.
return "unknown";
}
case LINUX:
switch (CPU.getCurrent()) {
case X86_32:
return "piii";
case X86_64:
return "k8";
case PPC:
return "ppc";
case ARM:
return "arm";
case S390X:
return "s390x";
default:
return "unknown";
}
default:
return "unknown";
}
}
return input;
}
/** Reverses the conversion performed by {@link #convert} to return the matching OS, CPU pair. */
public static Pair<CPU, OS> reverse(String input) {
if (input == null || input.length() == 0 || "unknown".equals(input)) {
// Use the auto-detected values.
return Pair.of(CPU.getCurrent(), OS.getCurrent());
}
// Handle the easy cases.
if (input.startsWith("darwin")) {
return Pair.of(CPU.getCurrent(), OS.DARWIN);
} else if (input.startsWith("freebsd")) {
return Pair.of(CPU.getCurrent(), OS.FREEBSD);
} else if (input.startsWith("x64_windows")) {
return Pair.of(CPU.getCurrent(), OS.WINDOWS);
}
// Handle the Linux cases.
if (input.equals("piii")) {
return Pair.of(CPU.X86_32, OS.LINUX);
} else if (input.equals("k8")) {
return Pair.of(CPU.X86_64, OS.LINUX);
} else if (input.equals("ppc")) {
return Pair.of(CPU.PPC, OS.LINUX);
} else if (input.equals("arm")) {
return Pair.of(CPU.ARM, OS.LINUX);
} else if (input.equals("s390x")) {
return Pair.of(CPU.S390X, OS.LINUX);
}
// Use the auto-detected values.
return Pair.of(CPU.getCurrent(), OS.getCurrent());
}
@Override
public String getTypeDescription() {
return "a string";
}
}
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