com.facebook.buck.features.halide.HalideCompilerStep.java Source code

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Here is the source code for com.facebook.buck.features.halide.HalideCompilerStep.java

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/*
 * Copyright 2014-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.halide;

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

public class HalideCompilerStep extends ShellStep {
    // The list of environment variables needed to run our generated compiler.
    private final ImmutableMap<String, String> environment;

    // The list of arguments needed to run our generated compiler.
    private final ImmutableList<String> compilerPrefix;

    // The output directory in which to write the generated shader code.
    private final Path outputDir;

    // The name of the function (or pipeline) to compile.
    private final String funcName;

    // The Halide target string for the target architecture, e.g. "x86-64-osx".
    private final String halideTarget;

    // Flags that can be passed directly to the Halide compiler.
    private final Optional<ImmutableList<String>> compilerInvocationFlags;

    public HalideCompilerStep(Path workingDirectory, ImmutableMap<String, String> environment,
            ImmutableList<String> compilerPrefix, Path outputDir, String funcName, String halideTarget,
            Optional<ImmutableList<String>> compilerInvocationFlags) {
        super(workingDirectory);
        this.environment = environment;
        this.compilerPrefix = compilerPrefix;
        this.outputDir = outputDir;
        this.funcName = funcName;
        this.halideTarget = halideTarget;
        this.compilerInvocationFlags = compilerInvocationFlags;
    }

    @Override
    protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
        ImmutableList.Builder<String> builder = ImmutableList.builder();
        builder.addAll(compilerPrefix);
        builder.add("-h");
        builder.add("-o", outputDir.toString());
        builder.add("-t", halideTarget);

        if (compilerInvocationFlags.isPresent()) {
            builder.addAll(compilerInvocationFlags.get());
        }

        builder.add(funcName);
        return builder.build();
    }

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

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