com.facebook.buck.features.go.GoPackStep.java Source code

Introduction

Here is the source code for com.facebook.buck.features.go.GoPackStep.java

Source

/*
 * 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.features.go;

import com.facebook.buck.core.build.execution.context.ExecutionContext;
import com.facebook.buck.shell.ShellStep;
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 GoPackStep extends ShellStep {
    public enum Operation {
        CREATE("c"), APPEND("r"), EXTRACT("x");

        String opCode;

        Operation(String opCode) {
            this.opCode = opCode;
        }

        public String getOpCode(boolean verbose) {
            return verbose ? opCode + "v" : opCode;
        }
    }

    private final ImmutableMap<String, String> environment;
    private final ImmutableList<String> packCommandPrefix;
    private final Operation op;
    private final ImmutableList<Path> srcs;
    private final Path output;
    private final Iterable<Path> filteredAsmSrcs;

    public GoPackStep(Path workingDirectory, ImmutableMap<String, String> environment,
            ImmutableList<String> packCommandPrefix, Operation op, ImmutableList<Path> srcs,
            Iterable<Path> filteredAsmSrcs, Path output) {
        super(workingDirectory);
        this.environment = environment;
        this.packCommandPrefix = packCommandPrefix;
        this.op = op;
        this.output = output;
        this.srcs = srcs;
        this.filteredAsmSrcs = filteredAsmSrcs;
    }

    @Override
    protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
        if (shouldSkipPacking()) {
            return ImmutableList.of();
        }
        return ImmutableList.<String>builder().addAll(packCommandPrefix)
                .add(op.getOpCode(context.getVerbosity().shouldUseVerbosityFlagIfAvailable()))
                .add(output.toString()).addAll(srcs.stream().map(Object::toString).iterator()).build();
    }

    @Override
    public ImmutableMap<String, String> getEnvironmentVariables(ExecutionContext context) {
        return environment;
    }

    @Override
    public String getShortName() {
        return "go pack";
    }

    private boolean shouldSkipPacking() {
        // We need to verify that we don't have any cgo compiled
        // sources coming in before skipping. Those need to be packed.
        boolean cgoSourcesExist = false;
        for (int i = 0; i < srcs.size(); i++) {
            Path path = srcs.get(i);
            if (path.toString().contains("cgo-second-step")) {
                cgoSourcesExist = true;
                break;
            }
        }
        return Iterables.isEmpty(filteredAsmSrcs) && !cgoSourcesExist;
    }
}