ExecResult r = exec(cmd);
        if (r.exitCode != 0) {
            throw new AssertionError(String.join(" ", cmd) + " failed: " + r);
        }
        return r.stdout;
    }

    private static final class ExecResult {
        final int exitCode;
        final String stdout;
        final String stderr;

        ExecResult(int exitCode, String stdout, String stderr) {

        }
    }

    static void pkill(String pid) {
        ExecResult execResult = run(isWindows() ? new String[]{"taskkill.exe", "/F", "/T", "/PID", pid} : new String[]{"kill", "-9", pid});
        if (execResult.code != 0) {
            System.out.println("Failed to kill daemon process " + pid + ". Maybe already killed?\nStdout:\n" + execResult.stdout + "\nStderr:\n" + execResult.stderr);
        }
    }

        ExecResult r = exec(cmd);
        if (r.exitCode() != 0) {
            throw new AssertionError(String.join(" ", cmd) + " failed: " + r);
        }
    }

    private static String stdout(String... cmd) throws IOException, InterruptedException, ExecutionException {
        ExecResult r = exec(cmd);
        if (r.exitCode() != 0) {

        }
        return forbiddenApisOutput;
    }

    private Set<String> runJdkJarHellCheck() throws IOException {
        ByteArrayOutputStream standardOut = new ByteArrayOutputStream();
        ExecResult execResult = getProject().javaexec(spec -> {
            spec.classpath(
                jdkJarHellClasspath,
                getRuntimeConfiguration(),

        final ExecResult execResult = execOperations.exec(spec -> {
            // The redundant cast is to silence a compiler warning.
            spec.setCommandLine((Object[]) args);
            spec.setStandardOutput(stdout);
            spec.setErrorOutput(stderr);
            spec.setIgnoreExitValue(true);
        });
        return new Result(execResult.getExitValue(), stdout.toString(), stderr.toString());

import org.gradle.api.provider.ProviderFactory;
import org.gradle.api.tasks.TaskContainer;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.process.ExecOperations;
import org.gradle.process.ExecResult;
import org.gradle.process.ExecSpec;

import javax.inject.Inject;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;