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package frege.gradle.plugins;
import com.google.common.collect.Lists;
import org.gradle.api.Buildable;
import org.gradle.api.GradleException;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Dependency;
import org.gradle.api.file.FileCollection;
import org.gradle.api.internal.file.collections.LazilyInitializedFileCollection;
import org.gradle.api.internal.tasks.TaskDependencyResolveContext;
import java.io.File;
import java.util.List;
public class FregeRuntime {
private final Project project;
public FregeRuntime(Project project) {
this.project = project;
}
public FileCollection inferFregeClasspath(final Iterable<File> classpath) {
return new LazilyInitializedFileCollection() {
public String getDisplayName() {
return "Frege runtime classpath";
}
public FileCollection createDelegate() {
final FregeJarFile fregeJar = FregeRuntime.this.findFregeJarFile(classpath);
if (fregeJar == null) {
throw new GradleException(String.format("Cannot infer Frege class path because no Frege Jar was found on class path: %s", classpath));
}
String notation = fregeJar.getDependencyNotation();
List<Dependency> dependencies = Lists.newArrayList();
dependencies.add(project.getDependencies().create(notation));
return project.getConfigurations().detachedConfiguration(dependencies.toArray(new Dependency[dependencies.size()]));
}
public void visitDependencies(TaskDependencyResolveContext context) {
if (classpath instanceof Buildable) {
context.add(classpath);
}
}
};
}
private FregeJarFile findFregeJarFile(Iterable<File> classpath) {
if (classpath == null) {
return null;
}
for (File file : classpath) {
FregeJarFile fregeJar = FregeJarFile.parse(file);
if (fregeJar != null) {
return fregeJar;
}
}
return null;
}
}
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