com.facebook.buck.jvm.scala.ScalacToJarStepFactory.java Source code

Introduction

Here is the source code for com.facebook.buck.jvm.scala.ScalacToJarStepFactory.java

Source

/*
 * Copyright 2015-present Facebook, Inc.
 *
 * 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.facebook.buck.jvm.scala;

import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.jvm.core.SuggestBuildRules;
import com.facebook.buck.jvm.java.BaseCompileToJarStepFactory;
import com.facebook.buck.jvm.java.ClassUsageFileWriter;
import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.rules.BuildContext;
import com.facebook.buck.rules.BuildRuleResolver;
import com.facebook.buck.rules.BuildableContext;
import com.facebook.buck.rules.RuleKeyObjectSink;
import com.facebook.buck.rules.SourcePathResolver;
import com.facebook.buck.rules.SourcePathRuleFinder;
import com.facebook.buck.rules.Tool;
import com.facebook.buck.step.Step;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Iterables;

import java.nio.file.Path;
import java.util.Optional;

public class ScalacToJarStepFactory extends BaseCompileToJarStepFactory {

    public static ImmutableList<String> collectScalacArguments(ScalaBuckConfig config, BuildRuleResolver resolver,
            ImmutableList<String> extraArguments) {

        return ImmutableList.<String>builder().addAll(config.getCompilerFlags()).addAll(extraArguments)
                .addAll(Iterables.transform(resolver.getAllRules(config.getCompilerPlugins()),
                        input -> "-Xplugin:" + input.getPathToOutput()))
                .build();
    }

    private final Tool scalac;
    private final ImmutableList<String> extraArguments;
    private final Function<BuildContext, Iterable<Path>> extraClassPath;

    public ScalacToJarStepFactory(Tool scalac, ImmutableList<String> extraArguments) {
        this(scalac, extraArguments, EMPTY_EXTRA_CLASSPATH);
    }

    public ScalacToJarStepFactory(Tool scalac, ImmutableList<String> extraArguments,
            Function<BuildContext, Iterable<Path>> extraClassPath) {
        this.scalac = scalac;
        this.extraArguments = extraArguments;
        this.extraClassPath = extraClassPath;
    }

    @Override
    public void createCompileStep(BuildContext context, ImmutableSortedSet<Path> sourceFilePaths,
            BuildTarget invokingRule, SourcePathResolver resolver, SourcePathRuleFinder ruleFinder,
            ProjectFilesystem filesystem, ImmutableSortedSet<Path> classpathEntries, Path outputDirectory,
            Optional<Path> workingDirectory, Path pathToSrcsList, Optional<SuggestBuildRules> suggestBuildRules,
            ClassUsageFileWriter usedClassesFileWriter,
            /* out params */
            ImmutableList.Builder<Step> steps, BuildableContext buildableContext) {

        steps.add(new ScalacStep(scalac, extraArguments, resolver, outputDirectory, sourceFilePaths,
                ImmutableSortedSet.<Path>naturalOrder()
                        .addAll(Optional.ofNullable(extraClassPath.apply(context)).orElse(ImmutableList.of()))
                        .addAll(classpathEntries).build(),
                filesystem));
    }

    @Override
    public void appendToRuleKey(RuleKeyObjectSink sink) {
        scalac.appendToRuleKey(sink);
        sink.setReflectively("extraArguments", extraArguments);
    }
}