rougail/creole/lint/cmdexec.py

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2019-11-23 08:17:35 +01:00
"a system command launcher"
import os, sys
import subprocess
from subprocess import Popen, PIPE
def cmdexec(cmd):
""" return output of executing 'cmd' in a separate process.
raise ExecutionFailed exception if the command failed.
the exception will provide an 'err' attribute containing
the error-output from the command.
"""
process = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = process.communicate()
status = process.poll()
if status:
raise ExecutionFailed(status, status, cmd, out, err)
return out
class ExecutionFailed(Exception):
def __init__(self, status, systemstatus, cmd, out, err):
Exception.__init__(self)
self.status = status
self.systemstatus = systemstatus
self.cmd = cmd
self.err = err
self.out = out
def __str__(self):
return "ExecutionFailed: %d %s\n%s" %(self.status, self.cmd, self.err)
# export the exception under the name 'Error'
Error = ExecutionFailed
try:
ExecutionFailed.__module__ = 'cmdexec'
ExecutionFailed.__name__ = 'Error'
except (AttributeError, TypeError):
pass