com.facebook.buck.haskell.HaskellLinkRule.java Source code

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Here is the source code for com.facebook.buck.haskell.HaskellLinkRule.java

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/*
 * Copyright 2016-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.haskell;

import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.model.BuildTargets;
import com.facebook.buck.rules.AbstractBuildRuleWithResolver;
import com.facebook.buck.rules.AddToRuleKey;
import com.facebook.buck.rules.BuildContext;
import com.facebook.buck.rules.BuildRuleParams;
import com.facebook.buck.rules.BuildableContext;
import com.facebook.buck.rules.SourcePathResolver;
import com.facebook.buck.rules.Tool;
import com.facebook.buck.rules.args.Arg;
import com.facebook.buck.shell.ShellStep;
import com.facebook.buck.step.ExecutionContext;
import com.facebook.buck.step.Step;
import com.facebook.buck.step.fs.MakeCleanDirectoryStep;
import com.facebook.buck.util.MoreIterables;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;

import java.nio.file.Path;

public class HaskellLinkRule extends AbstractBuildRuleWithResolver {

    @AddToRuleKey
    private final Tool linker;

    @AddToRuleKey
    private final String name;

    @AddToRuleKey
    private final ImmutableList<Arg> args;

    @AddToRuleKey
    private final ImmutableList<Arg> linkerArgs;

    private final boolean cacheable;

    public HaskellLinkRule(BuildRuleParams buildRuleParams, SourcePathResolver resolver, Tool linker, String name,
            ImmutableList<Arg> args, ImmutableList<Arg> linkerArgs, boolean cacheable) {
        super(buildRuleParams, resolver);
        this.linker = linker;
        this.name = name;
        this.args = args;
        this.linkerArgs = linkerArgs;
        this.cacheable = cacheable;
    }

    protected static Path getOutputDir(BuildTarget target, ProjectFilesystem filesystem) {
        return BuildTargets.getGenPath(filesystem, target, "%s");
    }

    private Path getOutput() {
        return getOutputDir(getBuildTarget(), getProjectFilesystem()).resolve(name);
    }

    @Override
    public ImmutableList<Step> getBuildSteps(BuildContext context, BuildableContext buildableContext) {
        buildableContext.recordArtifact(getOutput());
        return ImmutableList.of(
                new MakeCleanDirectoryStep(getProjectFilesystem(),
                        getOutputDir(getBuildTarget(), getProjectFilesystem())),
                new ShellStep(getProjectFilesystem().getRootPath()) {

                    @Override
                    public ImmutableMap<String, String> getEnvironmentVariables(ExecutionContext context) {
                        return ImmutableMap.<String, String>builder().putAll(super.getEnvironmentVariables(context))
                                .putAll(linker.getEnvironment()).build();
                    }

                    @Override
                    protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
                        return ImmutableList.<String>builder().addAll(linker.getCommandPrefix(getResolver()))
                                .add("-o", getProjectFilesystem().resolve(getOutput()).toString())
                                .addAll(Arg.stringify(args)).addAll(MoreIterables
                                        .zipAndConcat(Iterables.cycle("-optl"), Arg.stringify(linkerArgs)))
                                .build();
                    }

                    @Override
                    public String getShortName() {
                        return "haskell-link";
                    }

                });
    }

    @Override
    public Path getPathToOutput() {
        return getOutput();
    }

    @Override
    public boolean isCacheable() {
        return cacheable;
    }

}