get_revision.py

def get_revision(path=None):
    """
    Return the revision identifier of the last commit in a git or svn source pool.
    """
    if path is None:
        path = "."
    import os, re, subprocess

    revision = None
    os.chdir(path)
    if os.path.exists('.git'):
        # get git revision
        output = subprocess.Popen(["git", "rev-parse", "HEAD"], stdout=subprocess.PIPE).communicate()[0]
        revision = output.strip()
    elif os.path.exists('.svn'):
        # get svn revision
        REVISION_RE = re.compile('(\d+).*', re.M)
        subprocess.Popen(["svn", "up", "-q"], stdout=None)
        output = subprocess.Popen(["svnversion"], stdout=subprocess.PIPE).communicate()[0]

        match = REVISION_RE.search(output)
        if match:
            revision = match.group(1)
    return revision