com.facebook.buck.halide.HalideLibraryBuilder.java Source code

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

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/*
 * 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.halide;

import com.facebook.buck.cli.BuckConfig;
import com.facebook.buck.cli.FakeBuckConfig;
import com.facebook.buck.cxx.AbstractCxxSourceBuilder;
import com.facebook.buck.cxx.CxxPlatform;
import com.facebook.buck.cxx.CxxPlatformUtils;
import com.facebook.buck.cxx.CxxPlatforms;
import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.model.Flavor;
import com.facebook.buck.model.FlavorDomain;
import com.facebook.buck.testutil.FakeProjectFilesystem;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Optional;
import java.util.regex.Pattern;

public class HalideLibraryBuilder extends
        AbstractCxxSourceBuilder<HalideLibraryDescription.Arg, HalideLibraryDescription, HalideLibraryBuilder> {
    public HalideLibraryBuilder(BuildTarget target, HalideBuckConfig halideBuckConfig,
            CxxPlatform defaultCxxPlatform, FlavorDomain<CxxPlatform> cxxPlatforms) {
        super(new HalideLibraryDescription(CxxPlatformUtils.DEFAULT_CONFIG, defaultCxxPlatform, cxxPlatforms,
                halideBuckConfig), target);
    }

    public HalideLibraryBuilder(BuildTarget target) throws IOException {
        this(target, createDefaultHalideConfig(new FakeProjectFilesystem()), createDefaultPlatform(),
                createDefaultPlatforms());
    }

    public static HalideBuckConfig createDefaultHalideConfig(ProjectFilesystem filesystem) throws IOException {
        Path path = Paths.get("fake_compile_script.sh");
        filesystem.touch(path);
        BuckConfig buckConfig = FakeBuckConfig.builder()
                .setSections(
                        ImmutableMap
                                .of(HalideBuckConfig.HALIDE_SECTION_NAME,
                                        ImmutableMap.of(HalideBuckConfig.HALIDE_XCODE_COMPILE_SCRIPT_KEY,
                                                path.toString(), "target_platform", "halide-target")))
                .setFilesystem(filesystem).build();
        return new HalideBuckConfig(buckConfig);
    }

    public static CxxPlatform createDefaultPlatform() {
        return CxxPlatform.builder().from(CxxPlatformUtils.DEFAULT_PLATFORM)
                .setFlagMacros(ImmutableMap.of("TEST_MACRO", "test_macro_expansion")).build();
    }

    // The #halide-compiler version of the HalideLibrary rule expects to be able
    // to find a CxxFlavor to use when building for the host architecture.
    // AbstractCxxBuilder doesn't create the default host flavor, so we "override"
    // the createDefaultPlatforms() method here.
    public static FlavorDomain<CxxPlatform> createDefaultPlatforms() {
        Flavor hostFlavor = CxxPlatforms.getHostFlavor();
        CxxPlatform hostCxxPlatform = CxxPlatform.builder().from(CxxPlatformUtils.DEFAULT_PLATFORM)
                .setFlavor(hostFlavor).build();

        CxxPlatform defaultCxxPlatform = createDefaultPlatform();

        return new FlavorDomain<>("C/C++ Platform",
                ImmutableMap.<Flavor, CxxPlatform>builder().put(defaultCxxPlatform.getFlavor(), defaultCxxPlatform)
                        .put(hostCxxPlatform.getFlavor(), hostCxxPlatform).build());
    }

    @Override
    protected HalideLibraryBuilder getThis() {
        return this;
    }

    public HalideLibraryBuilder setSupportedPlatformsRegex(Pattern supportedPlatformsRegex) {
        arg.supportedPlatformsRegex = Optional.of(supportedPlatformsRegex);
        return this;
    }

    public HalideLibraryBuilder setCompilerInvocationFlags(ImmutableList<String> flags) {
        arg.compilerInvocationFlags = flags;
        return this;
    }

    public HalideLibraryBuilder setFunctionNameOverride(String functionName) {
        arg.functionName = Optional.of(functionName);
        return this;
    }

}