#!/usr/bin/python -u

import sys
import argparse
from sets import Set
from os.path import expanduser
import re

proj_root = expanduser("~") + '/local/src/cvs.stable/proj'

def re_section(name):
    return re.compile('[' + name + ']'
                 '.*?'
                 '(?=[)',
                 re.DOTALL)

# --------------------------------------------------------------------- helpers
def get_section(path, section):
    r = ''
    file = open(path)
    pat = '[' + section + ']'
    in_section = False
    for line in file:
        if (line.rstrip() == pat):
            in_section = True
            continue
        if in_section:
            if len(line) and line[0] == '[':
                break
            r = r + line
    file.close()
    return r.rstrip()
 
def get_value(path, section, key):
    r = ()
    file = open(path)
    if not len(section):
        for line in file:
            r = re.findall(key + ' *= *(.*)', line)
            if (len(r) > 0):
                break
    else:
        in_section = False
        pat = '[' + section + ']'
        for line in file:
            if (line.rstrip() == pat):
                in_section = True
                continue
            if in_section:
                if len(line) and line[0] == '[':
                    break
                r = re.findall(key + ' *= *(.*)', line)
                if (len(r) > 0):
                    break
    file.close()
    if len(r):
        return r[0]
    return ""
 
def add_module_from_projects_txt(buf, name, section, key):
    if name in buf:
        return
    buf.add(name)
    deps = get_value(proj_root + '/' + name + '/doc/share/project.txt', section, key).split()
    for dep in deps:
        add_module_from_projects_txt(buf, dep, section, key)

# --------------------------------------------------------------------- commands

def cmd_test(args_):
    parser = argparse.ArgumentParser(description='Test')
    parser.add_argument('blah', default='', help='The blah argument')
    args=parser.parse_args(args_)
    print "blah = " + args.blah

def cmd_ldlibpath(args_):
    parser = argparse.ArgumentParser(description='ldlibpath')
    parser.add_argument('module', nargs='*', help='Modules')
    args=parser.parse_args(args_)
    deps = Set()
    for m in args.module:
        add_module_from_projects_txt(deps, m, 'dependencies', 'ldlibpath')
    for m in deps:
        print m

global_args = []
for a in sys.argv[1::]:
    global_args.append(a)
    if a[0] != '-':
        break

# -------------------------------------------------------------------- here we go

parser = argparse.ArgumentParser(description='Project metadata evaluation')
parser.add_argument('cmd', default='', help='Command')
parser.add_argument('arg', nargs='*', help='Command arguments')
args=parser.parse_args(global_args)
cmd = getattr(sys.modules[__name__], 'cmd_' + args.cmd);
cmd(sys.argv[(len(global_args) + 1)::])