import logging

from wizard import deploy

def parse_install_lines(show, options, yield_errors = False):
    if not show: show = deploy.applications
    show = frozenset(show)
    for line in deploy.getInstallLines(options.versions_path):
        # construction
        try:
            d = deploy.Deployment.parse(line)
            name = d.application.name
        except deploy.NoSuchApplication as e:
            if yield_errors:
                yield e
            continue
        except deploy.Error:
            # we consider this a worse error
            logging.warning("Error with '%s'" % line.rstrip())
            continue
        # filter
        if name + "-" + str(d.version) in show or name in show:
            pass
        else:
            continue
        # yield
        yield d

class Counter(object):
    def __init__(self):
        self.dict = {}
    def count(self, value):
        self.dict.setdefault(value, 0)
        self.dict[value] += 1
    def __getitem__(self, key):
        return self.dict[key]
    def __iter__(self):
        return self.dict.__iter__()