env GOTOOLCHAIN=go1.21rc3
! go version
stderr 'go: downloading go1.21rc3 '

env GOTOOLCHAIN=go1.22rc2
! go version
stderr 'go: downloading go1.22rc2 '

env GOTOOLCHAIN=go1.66
! go version
stderr 'go: invalid toolchain: go1.66 is a language version but not a toolchain version \(go1.66.x\)'

env GOTOOLCHAIN=go1.18beta2
! go version
stderr 'go: downloading go1.18beta2 '

# go1.X is okay for path lookups

env GOTOOLCHAIN=go1.999testmod
go version
stderr 'go: downloading go1.999testmod \(.*/.*\)'

# GOTOOLCHAIN cached from network
go version
! stderr downloading
stdout go1.999testmod

# GOTOOLCHAIN with GOSUMDB enabled but at a bad URL should operate in cache and not try badurl
env oldsumdb=$GOSUMDB
env GOSUMDB=$oldsumdb' http://badurl'
go version
! stderr downloading
stdout go1.999testmod

Downloading https://gradle.org...

      DOWNLOAD_COMMAND="curl -fLSs --retry 5 --retry-delay 1 --retry-connrefused"
      return
    fi
    echo curl does not support https, will try wget for downloading files.
  else
    echo curl is not installed, will try wget for downloading files.
  fi

  # Try wget.
  if command -v wget > /dev/null; then
    DOWNLOAD_COMMAND="wget -qO -"
    return
  fi
  echo wget is not installed.

            }
        }
        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
        try {
            downloadFileFromURL(url, outputFile);
            System.out.println("Done");
            System.exit(0);
        } catch (Throwable e) {
            System.out.println("- Error downloading");
            e.printStackTrace();
            System.exit(1);
        }
    }

        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    )
    if "%MVNW_VERBOSE%" == "true" (
        echo Couldn't find %WRAPPER_JAR%, downloading it ...
        echo Downloading from: %DOWNLOAD_URL%
    )

    powershell -Command "&{"^
		"$webclient = new-object System.Net.WebClient;"^

    @Nested
    public abstract Resource getResource(); // Use an abstract getter method annotated with @Nested

    @TaskAction
    void run() {
        // Use the `resource` property
        System.out.println("Downloading https://" + getResource().getHostName().get() + "/" + getResource().getPath().get());
    }
}

Downloading https://gradle.org/training...

> Task :download
Server is running at https://localhost:5005/

# Regression test for https://go.dev/issue/64282.
#
# 'go install' and 'go run' with pkg@version arguments should make
# a best effort to parse flags relevant to downloading modules
# (currently only -modcacherw) before actually downloading the module
# to identify which toolchain version to use.
#
# However, the best-effort flag parsing should not interfere with
# actual flag parsing if we don't switch toolchains. In particular,