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47 lines
1.0 KiB
Python
47 lines
1.0 KiB
Python
#! /usr/bin/env python
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"""
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Illustrate how to override a class method to do something
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In this case, print the commands being executed as strings
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(the commands are usually lists, so this can be misleading)
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"""
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import sys
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from waflib import Context, Utils, Logs
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def exec_command(self, cmd, **kw):
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subprocess = Utils.subprocess
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kw['shell'] = isinstance(cmd, str)
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txt = cmd
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if isinstance(cmd, list):
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txt = ' '.join(cmd)
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print(txt)
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Logs.debug('runner_env: kw=%s' % kw)
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try:
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if self.logger:
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# warning: may deadlock with a lot of output (subprocess limitation)
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self.logger.info(cmd)
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kw['stdout'] = kw['stderr'] = subprocess.PIPE
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p = subprocess.Popen(cmd, **kw)
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(out, err) = p.communicate()
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if out:
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self.logger.debug('out: %s' % out.decode(sys.stdout.encoding or 'iso8859-1'))
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if err:
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self.logger.error('err: %s' % err.decode(sys.stdout.encoding or 'iso8859-1'))
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return p.returncode
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else:
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p = subprocess.Popen(cmd, **kw)
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return p.wait()
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except OSError:
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return -1
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Context.Context.exec_command = exec_command
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