#!/usr/bin/python

import sys,os,re,string,os.path,glob

if not os.path.isdir("ocroscript") and os.path.isdir("ocr-layout"):
    sys.stderr.write("must run this script from the top directory of ocropus")
    sys.exit(1)

dirs = {}
edges = []

files = glob.glob("*/*.h") + glob.glob("*/*.cc")
for file in files:
    dir = os.path.dirname(file)
    base = os.path.basename(file)
    dirs[base] = dir
    for line in open(file,"r").xreadlines():
        match = re.search(r'^#\s*include\s+"(.*?)"',line)
        if match:
            include = match.group(1)
            edges.append((include,dir))
            # print include,dir

dedges = {}
for include,dir in edges:
    sdir = dirs.get(include,None)
    if sdir:
        l = dedges.get((sdir,dir),[])
        if not include in l:
            dedges[(sdir,dir)] = l+[include]
            # print sdir,"->",dir,"(",include,")"

stream = open("_deps.dot","w")
stream.write("""
digraph "Include Dependencies"
{
    rankdir = "LR";
    size = "8,20";
    ratio = compress;
""")

iter = dedges.keys()
for sdir,dir in iter:
    stream.write('"%s"'%sdir+"->"+'"%s"'%dir+";\n")
    # stream.write('"%s"'%sdir+"->"+'"%s"'%dir+" [label=\"%s\"];\n"%dedges[(sdir,dir)])

stream.write("""
}
""")
stream.close()

out = "doc/includes/include-hierarchy.png"
os.system("dot -o %s -Tpng _deps.dot"%out)
sys.stderr.write("output in %s\n"%out)