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

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Here is the source code for com.facebook.buck.halide.HalideBuckConfig.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.halide;

import com.facebook.buck.cli.BuckConfig;
import com.facebook.buck.cxx.CxxPlatform;
import com.facebook.buck.util.HumanReadableException;
import com.google.common.collect.ImmutableMap;

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

/**
 * A Halide-specific "view" of BuckConfig.
 */
public class HalideBuckConfig {
    public static final String HALIDE_SECTION_NAME = "halide";
    public static final String HALIDE_XCODE_COMPILE_SCRIPT_KEY = "xcode_compile_script";
    private static final String HALIDE_TARGET_KEY_PREFIX = "target_";

    private final BuckConfig delegate;

    public HalideBuckConfig(BuckConfig delegate) {
        this.delegate = delegate;
    }

    public String getHalideTargetForPlatform(CxxPlatform cxxPlatform) {
        String flavorName = cxxPlatform.getFlavor().toString();
        ImmutableMap<String, String> targetMap = getHalideTargetMap();
        if (!targetMap.containsKey(flavorName)) {
            throw new HumanReadableException("No halide target found for platform: '%s'\n"
                    + "Add one in .buckconfig in the halide section.\n" + "\n" + "Example:\n" + "\n" + "[halide]"
                    + "\n" + "target_%s = x86-64-osx-user_context", flavorName, flavorName);
        }
        return targetMap.get(flavorName);
    }

    private ImmutableMap<String, String> getHalideTargetMap() {
        ImmutableMap<String, String> allEntries = delegate.getEntriesForSection(HALIDE_SECTION_NAME);
        ImmutableMap.Builder<String, String> targets = ImmutableMap.builder();
        for (Map.Entry<String, String> entry : allEntries.entrySet()) {
            if (entry.getKey().startsWith(HALIDE_TARGET_KEY_PREFIX)) {
                targets.put(entry.getKey().substring(HALIDE_TARGET_KEY_PREFIX.length()), entry.getValue());
            }
        }
        return targets.build();
    }

    /// Get the path to the Halide compile script for Xcode.
    public Path getXcodeCompileScriptPath() {
        return delegate.getRequiredPath(HALIDE_SECTION_NAME, HALIDE_XCODE_COMPILE_SCRIPT_KEY);
    }
}