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Viewing changes to hooks/lib/charmhelpers/contrib/openstack/alternatives.py

  • Committer: Robin Winslow
  • Date: 2014-05-27 14:00:44 UTC
  • Revision ID: robin.winslow@canonical.com-20140527140044-8rpmb3wx4djzwa83
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hooks/lib/charmhelpers/contrib/openstack/alternatives.py
 
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''' Helper for managing alternatives for file conflict resolution '''
 
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import subprocess
 
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import shutil
 
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import os
 
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def install_alternative(name, target, source, priority=50):
 
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    ''' Install alternative configuration '''
 
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    if (os.path.exists(target) and not os.path.islink(target)):
 
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        # Move existing file/directory away before installing
 
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        shutil.move(target, '{}.bak'.format(target))
 
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    cmd = [
 
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        'update-alternatives', '--force', '--install',
 
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        target, name, source, str(priority)
 
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    ]
 
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    subprocess.check_call(cmd)