llvm_tools: pass cl number as str to avoid type error

llvm_bisection.py invokes the Gerrit CLI to abandon CLs created as part of the bisection. It passes a CL number to the command. Before this change, the CL number was passed as an int, which leads to the following error:

  Traceback (most recent call last):
    File "./auto_llvm_bisection.py", line 103, in main
      bisection_ret = llvm_bisection.main(args_output)
    File "/usr/local/google/home/inglorion/chromiumos/src/third_party/toolchain-utils/llvm_tools/llvm_bisection.py", line 364, in main
      subprocess.check_output([gerrit, 'abandon', build['cl']],
    File "/usr/lib/python3.8/subprocess.py", line 411, in check_output
      return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
    File "/usr/lib/python3.8/subprocess.py", line 489, in run
      with Popen(*popenargs, **kwargs) as process:
    File "/usr/lib/python3.8/subprocess.py", line 854, in __init__
      self._execute_child(args, executable, preexec_fn, close_fds,
    File "/usr/lib/python3.8/subprocess.py", line 1637, in _execute_child
      self.pid = _posixsubprocess.fork_exec(
  TypeError: expected str, bytes or os.PathLike object, not int

With this change, we convert the value to an str first, avoiding the type error.

TEST=run auto_llvm_bisection.py

Change-Id: I2b151c76757067f536712f69b14d6be549ee7c75
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2551789
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Jian Cai <jiancai@google.com>
Tested-by: Bob Haarman <inglorion@chromium.org>
2 files changed