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package ch.fhnw.thga.gradleplugins;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.function.BiFunction;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.inject.Inject;
import org.gradle.api.DefaultTask;
import org.gradle.api.file.Directory;
import org.gradle.api.file.DirectoryProperty;
import org.gradle.api.file.FileTree;
import org.gradle.api.file.RegularFileProperty;
import org.gradle.api.model.ObjectFactory;
import org.gradle.api.provider.ListProperty;
import org.gradle.api.provider.Property;
import org.gradle.api.provider.Provider;
import org.gradle.api.tasks.CacheableTask;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.InputDirectory;
import org.gradle.api.tasks.InputFile;
import org.gradle.api.tasks.Internal;
import org.gradle.api.tasks.JavaExec;
import org.gradle.api.tasks.OutputDirectory;
import org.gradle.api.tasks.PathSensitive;
import org.gradle.api.tasks.PathSensitivity;
import org.gradle.api.tasks.TaskAction;
@CacheableTask
public abstract class CompileFregeTask extends DefaultTask {
private final JavaExec javaExec;
private static final BiFunction<String, Directory, FileTree> excludeReplSourceFile =
(String replSource,
Directory srcDir) ->
{
if (replSource.isEmpty()) return srcDir.getAsFileTree();
return srcDir.getAsFileTree().matching(
pattern ->
{
pattern.exclude(
String.format(
"**/%s",
replSource)
);
}
);
};
@InputFile
@PathSensitive(PathSensitivity.RELATIVE)
public abstract RegularFileProperty getFregeCompilerJar();
@InputDirectory
@PathSensitive(PathSensitivity.RELATIVE)
public abstract DirectoryProperty getFregeMainSourceDir();
@Input
public abstract ListProperty<String> getFregeCompilerFlags();
@Input
public abstract Property<String> getFregeDependencies();
@Input
public abstract Property<String> getReplSource();
@OutputDirectory
public abstract DirectoryProperty getFregeOutputDir();
@Internal
public final Provider<String> getFregeMainSourcePath() {
return getFregeMainSourceDir().map(srcDir -> srcDir.getAsFile().getAbsolutePath());
}
@Internal
public final Provider<List<String>> getSourcePathArg() {
return getFregeMainSourcePath().map(srcPath -> List.of("-sp", srcPath));
}
@Internal
public final Provider<FileTree> getSourceFileTree() {
return getReplSource().zip(
getFregeMainSourceDir(),
excludeReplSourceFile);
}
@Internal
public final Provider<List<String>> getSourceFiles() {
return getSourceFileTree()
.map(tree -> tree.getFiles().stream()
.map(file -> file.getAbsolutePath())
.collect(Collectors.toList())
);
}
@Internal
public final Provider<List<String>> getDependencyArg() {
return getFregeDependencies().map(depsClasspath -> {
return depsClasspath.isEmpty() ? Collections.emptyList()
: List.of("-fp", depsClasspath);
});
}
@Inject
public CompileFregeTask(ObjectFactory objectFactory) {
javaExec = objectFactory.newInstance(JavaExec.class);
}
private List<String> buildCompilerArgsFromProperties(List<String> directoryArg)
{
return Stream.of(
getDependencyArg().get(),
getFregeCompilerFlags().get(),
directoryArg,
getSourcePathArg().get(),
getSourceFiles().get())
.filter(lists -> !lists.isEmpty())
.flatMap(Collection::stream)
.collect(Collectors.toList());
}
@TaskAction
public void compileFrege() {
List<String> directoryArg = List.of(
"-d",
getFregeOutputDir().getAsFile().get().getAbsolutePath());
javaExec.setClasspath(getProject().files(getFregeCompilerJar()))
.setArgs(buildCompilerArgsFromProperties(directoryArg)).exec();
}
}
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