| // Copyright 2014 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.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Multimap; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.cmdline.LabelSyntaxException; |
| import com.google.devtools.build.lib.packages.Attribute.SplitTransition; |
| import com.google.devtools.common.options.Options; |
| import com.google.devtools.common.options.OptionsBase; |
| |
| import java.io.Serializable; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Command-line build options for a Blaze module. |
| */ |
| public abstract class FragmentOptions extends OptionsBase implements Cloneable, Serializable { |
| |
| /** |
| * Adds all labels defined by the options to a multimap. See {@code BuildOptions.getAllLabels()}. |
| * |
| * <p>There should generally be no code duplication between this code and DefaultsPackage. Either |
| * the labels are loaded unconditionally using this method, or they are added as magic labels |
| * using the tools/defaults package, but not both. |
| * |
| * @param labelMap a mutable multimap to which the labels of this fragment should be added |
| */ |
| public void addAllLabels(Multimap<String, Label> labelMap) { |
| } |
| |
| /** |
| * Returns the labels contributed to the defaults package by this fragment. |
| * |
| * <p>The set of keys returned by this function should be constant, however, the values are |
| * allowed to change depending on the value of the options. |
| */ |
| @SuppressWarnings("unused") |
| public Map<String, Set<Label>> getDefaultsLabels(BuildConfiguration.Options commonOptions) { |
| return ImmutableMap.of(); |
| } |
| |
| /** |
| * Returns the extra rules contributed to the default package by this fragment. |
| * |
| * <p>The return value should be a list of strings, which are merged into the BUILD files of the |
| * defaults package. |
| * |
| * <p><strong>WARNING;</strong> this method should only be used when absolutely necessary. Always |
| * prefer {@code getDefaultsLabels()} to this. |
| */ |
| public ImmutableList<String> getDefaultsRules() { |
| return ImmutableList.of(); |
| } |
| |
| /** |
| * Returns a list of potential split configuration transitions for this fragment. Split |
| * configurations usually need to be explicitly enabled by passing in an option. |
| */ |
| public List<SplitTransition<BuildOptions>> getPotentialSplitTransitions() { |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| public FragmentOptions clone() { |
| try { |
| return (FragmentOptions) super.clone(); |
| } catch (CloneNotSupportedException e) { |
| // This can't happen. |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| /** |
| * Creates a new FragmentOptions instance with all flags set to default. |
| */ |
| public FragmentOptions getDefault() { |
| return Options.getDefaults(getClass()); |
| } |
| |
| /** |
| * Creates a new FragmentOptions instance with flags adjusted to host platform. |
| * |
| * @param fallback see {@code BuildOptions.createHostOptions} |
| */ |
| @SuppressWarnings("unused") |
| public FragmentOptions getHost(boolean fallback) { |
| return getDefault(); |
| } |
| |
| protected void addOptionalLabel(Multimap<String, Label> map, String key, String value) { |
| Label label = parseOptionalLabel(value); |
| if (label != null) { |
| map.put(key, label); |
| } |
| } |
| |
| private static Label parseOptionalLabel(String value) { |
| if (value != null) { |
| try { |
| return Label.parseAbsolute(value); |
| } catch (LabelSyntaxException e) { |
| // We ignore this exception here - it will cause an error message at a later time. |
| // TODO(bazel-team): We can use a Converter to check the validity of the crosstoolTop |
| // earlier. |
| return null; |
| } |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns {@code true} if static configurations should be used with |
| * {@link BuildConfiguration.Options.DynamicConfigsMode.NOTRIM_PARTIAL}. |
| */ |
| public boolean useStaticConfigurationsOverride() { |
| return false; |
| } |
| } |