def run_command_output()

in src/tools/diagnostics/updatecenter_troubleshooter.py [0:0]

• 46 lines of code
• 9 McCabe index (conditional complexity)

    def run_command_output(self, cmd, no_output, chk_err=True):
        """
        Wrapper for subprocess.check_output. Execute 'cmd'.
        Returns return code and STDOUT, trapping expected exceptions.
        Reports exceptions to Error if chk_err parameter is True
        """

        def check_output(no_output, *popenargs, **kwargs):
            """
            Backport from subprocess module from python 2.7
            """
            if 'stdout' in kwargs:
                raise ValueError(
                    'stdout argument not allowed, it will be overridden.')
            if no_output is True:
                out_file = None
            else:
                out_file = subprocess.PIPE

            process = subprocess.Popen(stdout=out_file, *popenargs, **kwargs)
            output, unused_err = process.communicate()
            retcode = process.poll()

            if retcode:
                cmd = kwargs.get("args")
                if cmd is None:
                    cmd = popenargs[0]
                raise subprocess.CalledProcessError(retcode,
                                                    cmd, output=output)
            return output

        class CalledProcessError(Exception):
            """Exception classes used by this module."""

            def __init__(self, returncode, cmd, output=None):
                self.returncode = returncode
                self.cmd = cmd
                self.output = output

            def __str__(self):
                return "Command '%s' returned non-zero exit status %d" \
                       % (self.cmd, self.returncode)

        subprocess.check_output = check_output
        subprocess.CalledProcessError = CalledProcessError
        try:
            output = subprocess.check_output(
                no_output, cmd, stderr=subprocess.STDOUT, shell=True)
        except subprocess.CalledProcessError as e:
            if chk_err:
                print("Error: CalledProcessError.  Error Code is: " + str(e.returncode), file=sys.stdout)
                print("Error: CalledProcessError.  Command string was: " + e.cmd, file=sys.stdout)
                print("Error: CalledProcessError.  Command result was: " +
                      self.get_subprocess_output_as_asciistring((e.output[:-1])), file=sys.stdout)
            if no_output:
                return e.returncode, None
            else:
                return e.returncode, self.get_subprocess_output_as_asciistring(e.output)

        if no_output:
            return 0, None
        else:
           return 0, self.get_subprocess_output_as_asciistring(output)