Synnefo

import pkg_resources

def get_dist_from_module(modname):

    pkgroot = pkg_resources.get_provider(modname).egg_root

    return list(pkg_resources.find_distributions(pkgroot))[0]

def get_dist(dist_name):

    return pkg_resources.get_distribution(dist_name)

def get_dist_version(dist_name):

    """

    Get the version for the specified distribution name

    """

    try:

        return get_dist(dist_name).version

    except Exception, e:

        return 'unknown'

def get_component_version(modname):

    """

    Return the version of a synnefo module/package based on its

    corresponding distributed package version

    """

    try:

        return get_dist_from_module(modname).version

    except Exception, e:

        return 'unknown'

def vcs_info():

    """

    Return current git HEAD commit information

    """

    import subprocess

    callgit = lambda(cmd): subprocess.Popen(

            ['/bin/sh', '-c', cmd],

            stdout=subprocess.PIPE).communicate()[0].strip()

    branch = callgit('git branch | grep -Ei "\* (.*)" | cut -f2 -d" "')

    revid = callgit("git --no-pager log --max-count=1 | cut -f2 -d' ' | head -1")

    revno = callgit('git --no-pager log --oneline | wc -l')

    desc = callgit('git describe')

    return branch, revid, revno, desc

def vcs_version():

    """

    Package version based on `git describe`, compatible with setuptools

    version format

    """

    return vcs_info()[3].replace('v', '')