#!/usr/bin/env python
"""
stub for the hg backend of silvermirror
"""

import os
import sys
from mercurial import commands, hg, ui
from optparse import OptionParser

def update(host, path):
    """
    get changes from host on path
    """
    ui = ui.ui()
    try: 
        repo = hg.repository(ui, path)
        command = commands.pull
    except mercurial.repo.RepoError:
        repo = hg.repository(ui, 'ssh://%s/%s' % (host, path))
        command = commands.clone

def repositories(path):
    """
    return all hg repositories in a path
    """

    ui = ui.ui()
    files = [ os.path.join(path, f) for f in os.listdir(path) ]
    directories = [ f for f in files if os.path.isdir(f) ]
                    
    repos = []
    for d in directories:
        try: 
            repo = hg.repository(ui, d)
            repos.append(os.path.basename(d))
        except mercurial.repo.RepoError:
            pass
    return repos

def main(args=sys.argv[1:]):
    parser = OptionParser()
    options, args = parser.parse_args(args)
    if len(args) > 1:
        raise NotImplementedError

if __name__ == '__main__':
    main()