/** In rare cases, we might write something to stderr. Append it to the real test.log. */
protected static void appendStderr(Path stdOut, Path stdErr) throws IOException {
FileStatus stat = stdErr.statNullable();
OutputStream out = null;
InputStream in = null;
if (stat != null) {
try {
if (stat.getSize() > 0) {
if (stdOut.exists()) {
stdOut.setWritable(true);
}
out = stdOut.getOutputStream(true);
in = stdErr.getInputStream();
ByteStreams.copy(in, out);
}
} finally {
Closeables.close(out, true);
Closeables.close(in, true);
stdErr.delete();
}
}
}
