#!/usr/bin/env python

# Caolan McNamara <caolanm@redhat.com>

import sys, re

buildorder = False
root = '.'
buildfile = 'prj/build.lst'
seenfrommodules = {}
seentomodules = {}
conditionals = []
dotlines = []

def mysplit(s):
    return re.split(':[\W]+', s)

def handlemodule(module, level):
    seenfrommodules[module] = True

    file = root + '/' + module + '/' + buildfile
#    print >> sys.stderr, 'file is', file

    dependline = ''
    try:
        dep = open(file, "r")
        dependline = dep.readline()[:-1]
        while dependline[0] == '#':
            dependline = dep.readline()[:-1]
        dependline = mysplit(dependline)[1]
        dep.close()
    except:
        print >> sys.stderr, 'missing module', module
#    print >> sys.stderr, dependline
    depends = dependline.split()
    for depend in depends:
        if depend == 'NULL':
            break
        elif depend == 'solenv':
            continue
        newmodule = depend
        element = newmodule.split(':')
        if len(element) > 1:
            newmodule = element[1]
            conditionals.append(newmodule)
        if seentomodules.has_key(newmodule):
            continue
        if buildorder:
            seentomodules[newmodule] = True
        dotlines.append(module + " -> " + newmodule + ' ;')
        if seenfrommodules.has_key(newmodule):
            continue
        handlemodule(newmodule, level + 1)

if len(sys.argv) < 1:
    print 'Usage: ooodrawbuildgraph [path] [-buildorder]'
    print 'e.g. oooextractcws /home/caolan/SRC680_m159'
else:
    if len(sys.argv) > 1:
        root = sys.argv[1]
    if len(sys.argv) > 2:
        buildorder = True
    handlemodule('instsetoo_native', 0)
    print 'digraph OOo {'
    print 'node [shape = rectangle] ;'
    if buildorder == True:
        print 'size="26,34" ;'
        print 'rankdir=LR ;'
    for dotline in dotlines:
        print dotline;
    print '}'