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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;
import static com.google.devtools.build.lib.analysis.config.BuildConfiguration.convertOptionsLabel;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration.LabelListConverter;
import com.google.devtools.build.lib.analysis.config.FragmentOptions;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.common.options.Converter;
import com.google.devtools.common.options.Option;
import com.google.devtools.common.options.OptionDocumentationCategory;
import com.google.devtools.common.options.OptionEffectTag;
import com.google.devtools.common.options.OptionMetadataTag;
import com.google.devtools.common.options.OptionsParsingException;
import java.util.List;
/** Command-line options for platform-related configuration. */
public class PlatformOptions extends FragmentOptions {
@Option(
name = "experimental_host_platform",
converter = BuildConfiguration.LabelConverter.class,
defaultValue = "@bazel_tools//platforms:host_platform",
documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
effectTags = {OptionEffectTag.UNKNOWN},
metadataTags = {OptionMetadataTag.HIDDEN},
help = "Declare the platform the build is started from"
)
public Label hostPlatform;
// TODO(katre): Add execution platforms.
@Option(
name = "experimental_platforms",
converter = BuildConfiguration.LabelListConverter.class,
defaultValue = "@bazel_tools//platforms:target_platform",
documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
effectTags = {OptionEffectTag.UNKNOWN},
metadataTags = {OptionMetadataTag.HIDDEN},
help = "Declare the platforms targeted by the current build"
)
public List<Label> platforms;
@Option(
name = "extra_toolchains",
converter = LabelListConverter.class,
defaultValue = "",
documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
effectTags = {OptionEffectTag.UNKNOWN},
metadataTags = {OptionMetadataTag.HIDDEN},
help = "Extra toolchains to be considered during toolchain resolution."
)
public List<Label> extraToolchains;
@Option(
name = "toolchain_resolution_override",
converter = ToolchainResolutionOverrideConverter.class,
allowMultiple = true,
defaultValue = "",
documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
effectTags = {OptionEffectTag.UNKNOWN},
metadataTags = {OptionMetadataTag.HIDDEN},
help =
"Override toolchain resolution for a toolchain type with a specific toolchain. "
+ "Example: --toolchain_resolution_override=@io_bazel_rules_go//:toolchain="
+ "@io_bazel_rules_go//:linux-arm64-toolchain"
)
public List<ToolchainResolutionOverride> toolchainResolutionOverrides;
@Option(
name = "toolchain_resolution_debug",
defaultValue = "false",
documentationCategory = OptionDocumentationCategory.LOGGING,
effectTags = {OptionEffectTag.TERMINAL_OUTPUT},
help =
"Print debug information while finding toolchains for a rule. This might help developers "
+ "of Bazel or Skylark rules with debugging failures due to missing toolchains."
)
public boolean toolchainResolutionDebug;
@Override
public PlatformOptions getHost(boolean fallback) {
PlatformOptions host = (PlatformOptions) getDefault();
host.platforms = ImmutableList.of(this.hostPlatform);
return host;
}
/** Data about which toolchain instance should be used for a given toolchain type. */
@AutoValue
public abstract static class ToolchainResolutionOverride {
public abstract Label toolchainType();
public abstract Label toolchainLabel();
private static ToolchainResolutionOverride create(Label toolchainType, Label toolchainLabel) {
return new AutoValue_PlatformOptions_ToolchainResolutionOverride(
toolchainType, toolchainLabel);
}
}
/**
* {@link Converter} implementation to create {@link ToolchainResolutionOverride} instances from
* the value set in the flag.
*/
public static class ToolchainResolutionOverrideConverter
implements Converter<ToolchainResolutionOverride> {
@Override
public ToolchainResolutionOverride convert(String input) throws OptionsParsingException {
int index = input.indexOf('=');
if (index == -1) {
throw new OptionsParsingException(
"Toolchain resolution override not in the type=toolchain format");
}
Label toolchainType = convertOptionsLabel(input.substring(0, index));
Label toolchain = convertOptionsLabel(input.substring(index + 1));
return ToolchainResolutionOverride.create(toolchainType, toolchain);
}
@Override
public String getTypeDescription() {
return "a hard-coded override for toolchain resolution, "
+ "in the format toolchainTypeLabel=toolchainLabel";
}
}
}
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