com.facebook.buck.features.lua.AbstractLuaScriptStarter.java Source code

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Here is the source code for com.facebook.buck.features.lua.AbstractLuaScriptStarter.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.features.lua;

import com.facebook.buck.core.model.BuildTarget;
import com.facebook.buck.core.model.InternalFlavor;
import com.facebook.buck.core.model.impl.BuildTargetPaths;
import com.facebook.buck.core.rules.ActionGraphBuilder;
import com.facebook.buck.core.rules.BuildRuleParams;
import com.facebook.buck.core.rules.SourcePathRuleFinder;
import com.facebook.buck.core.rules.impl.WriteStringTemplateRule;
import com.facebook.buck.core.sourcepath.SourcePath;
import com.facebook.buck.core.sourcepath.resolver.SourcePathResolver;
import com.facebook.buck.core.toolchain.tool.Tool;
import com.facebook.buck.core.util.immutables.BuckStyleTuple;
import com.facebook.buck.file.WriteFile;
import com.facebook.buck.io.filesystem.ProjectFilesystem;
import com.facebook.buck.util.Escaper;
import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.Resources;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Optional;
import org.immutables.value.Value;

/** {@link Starter} implementation which builds a starter as a Lua script. */
@Value.Immutable
@BuckStyleTuple
abstract class AbstractLuaScriptStarter implements Starter {

    private static final String STARTER = "starter.lua.in";

    abstract ProjectFilesystem getProjectFilesystem();

    abstract BuildTarget getBaseTarget();

    abstract BuildRuleParams getBaseParams();

    abstract ActionGraphBuilder getActionGraphBuilder();

    abstract SourcePathResolver getPathResolver();

    abstract SourcePathRuleFinder getRuleFinder();

    abstract LuaPlatform getLuaPlatform();

    abstract BuildTarget getTarget();

    abstract Path getOutput();

    abstract String getMainModule();

    abstract Optional<Path> getRelativeModulesDir();

    abstract Optional<Path> getRelativePythonModulesDir();

    private String getPureStarterTemplate() {
        try {
            return Resources.toString(Resources.getResource(AbstractLuaScriptStarter.class, STARTER),
                    Charsets.UTF_8);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public SourcePath build() {
        BuildTarget templateTarget = getBaseTarget().withAppendedFlavors(InternalFlavor.of("starter-template"));
        WriteFile templateRule = getActionGraphBuilder()
                .addToIndex(new WriteFile(templateTarget, getProjectFilesystem(), getPureStarterTemplate(),
                        BuildTargetPaths.getGenPath(getProjectFilesystem(), templateTarget, "%s/starter.lua.in"),
                        /* executable */ false));

        Tool lua = getLuaPlatform().getLua().resolve(getActionGraphBuilder());
        WriteStringTemplateRule writeStringTemplateRule = getActionGraphBuilder()
                .addToIndex(
                        WriteStringTemplateRule
                                .from(getProjectFilesystem(), getBaseParams(), getRuleFinder(), getTarget(),
                                        getOutput(), templateRule.getSourcePathToOutput(),
                                        ImmutableMap.of("SHEBANG", lua.getCommandPrefix(getPathResolver()).get(0),
                                                "MAIN_MODULE", Escaper.escapeAsPythonString(getMainModule()),
                                                "MODULES_DIR",
                                                getRelativeModulesDir().isPresent() ? Escaper.escapeAsPythonString(
                                                        getRelativeModulesDir().get().toString()) : "nil",
                                                "PY_MODULES_DIR",
                                                getRelativePythonModulesDir().isPresent()
                                                        ? Escaper.escapeAsPythonString(
                                                                getRelativePythonModulesDir().get().toString())
                                                        : "nil",
                                                "EXT_SUFFIX", Escaper.escapeAsPythonString(getLuaPlatform()
                                                        .getCxxPlatform().getSharedLibraryExtension())),
                                        /* executable */ true));

        return writeStringTemplateRule.getSourcePathToOutput();
    }
}