Fabric deploy task: tags the set of files with the name of the host machine the deploy is going to + a unique time stamp

fabfile.py

# Default directory for the installation
code_dir = '/opt/your_deployment'
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@task
def tag(branch):
	"""
    Tags the release
    """
    now = datetime.datetime.now()
    refspec = ('{0:s}_{1:s}{2:s}'.format(target_host(), now.strftime('%Y.%m.%d.%H.%M.'),
    (sudo('git log --since=1.day --oneline | wc -l').strip())))
    print('Tagging version {ref:s} in fabfile'.format(**{'ref': refspec}))
    sudo('git tag {ref:s} -m "Tagging version {ref:s} in fabfile"'.format(**{'ref': refspec}))
    sudo('git push --tags')
    fn = '{0:>s}.tag'.format(refspec)
    with open(fn, 'a') as f:
    	f.write('Tagged version deployed: {0:s}{1:s}\n'.format(branch, refspec))
    with cd(code_dir):
    	put(fn, '.', use_sudo=True)
    return refspec
    
@task
def target_host():
	"""
    display hostname of the target machine
    """
    hn = sudo('hostname')
    return hn