John Howard <******@****.***> 1572058059 -0700

Martin Taillefer <******@****.***> 1572291239 -0700

John Howard <******@****.***> 1619132365 -0700

Martin Taillefer <******@****.***> 1572291239 -0700

Martin Taillefer <******@****.***> 1572291239 -0700

John Howard <******@****.***> 1643929095 -0800

John Howard <******@****.***> 1712595956 -0700

	if err := buf.UnreadByte(); err != nil {
		// should not happen
		t.Fatal(err)
	}
	if err := buf.UnreadByte(); err == nil {
		t.Fatal("UnreadByte: expected error, got nil")
	}
}

// verify that copying from an empty reader always has the same results,
// regardless of the presence of a WriteTo method.
func TestReaderCopyNothing(t *testing.T) {
	type nErr struct {
		n   int64
		err error
	}

  chmod +x "$2"

  # Make a copy named just "ztunnel" in the same directory (overwrite if necessary).
  echo "Copying $2 to $(dirname "$2")/${3}"
  cp -f "$2" "$(dirname "$2")/${3}"
  popd

  # Also copy it to out/$os_arch/ztunnel as that's whats used in the build
  echo "Copying '${2}' to ${TARGET_OUT_LINUX}/ztunnel"
  cp -f "${2}" "${TARGET_OUT_LINUX}/ztunnel"
}

function maybe_build_ztunnel() {

ISTIO_ENVOY_NATIVE_PATH=${ISTIO_ENVOY_LINUX_RELEASE_PATH}

# Copy native envoy binary to TARGET_OUT
echo "Copying ${ISTIO_ENVOY_NATIVE_PATH} to ${TARGET_OUT}/${SIDECAR}"
cp -f "${ISTIO_ENVOY_NATIVE_PATH}" "${TARGET_OUT}/${SIDECAR}"

# Copy the envoy binary to TARGET_OUT_LINUX if the local OS is not Linux
if [[ "$GOOS_LOCAL" != "linux" ]]; then
   echo "Copying ${ISTIO_ENVOY_LINUX_RELEASE_PATH} to ${TARGET_OUT_LINUX}/${SIDECAR}"