from collections import OrderedDict, deque, namedtuple
import shlex

Meta = namedtuple('Meta', ['sects', 'meta'])

def _merge(l):
    return ''.join(l).strip()
def _next(l):
    sect = deque()
    while l and not l[0].strip().startswith('$'):
        sect.append(l.popleft())
    if not l:
        return (('TRAIL', _merge(sect)), l)
    name = l.popleft().strip()[1:]
    sect = _merge(sect)
    return ((name, sect), l)
def parse(s):
    l = deque(s.splitlines(True))
    meta = dict()
    sects = OrderedDict()
    while l and l[0].strip().startswith('$'):
        s = shlex.split(l[0][1:])
        meta[s[0]] = s[1:]
        l.popleft()
    while l:
        s, l = _next(l)
        sects[s[0]] = s[1]
    return Meta(sects, meta)