#!/usr/bin/python

import os
import subprocess
import re
import shutil
from pprint import pprint as pp

OTR_RE = re.compile('^\t([^ ]+) (.+)')
SPLIT = re.compile('[\n\r]+')
LP_RE = re.compile('@loader_path/(.+)$')
FPREFIX = 'gqrx.app/Contents/Frameworks/'
LIB_PATHS = ['/usr/local/opt/boost/lib/']

lib_deps = {}

def iteration(pass_num):
    print '\nFixing dependencied, pass: {0}'.format(pass_num)
    for root, dirs, files in os.walk(FPREFIX):
        for fn in files:
            if not fn.endswith('.dylib'):
                continue
            lib_path = os.path.join(root, fn)

            deps = []

            output = subprocess.check_output(['otool', '-L', lib_path])
            for line in SPLIT.split(output):
                mo = OTR_RE.match(line)
                if mo is None:
                    continue

                d = mo.group(1)

                if d.startswith('/System/') or d.startswith('/usr/lib') or d.startswith('@executable_path'):
                    continue

                deps.append(d)

            lib_deps[lib_path.replace(FPREFIX, '')] = deps

    counter = 0

    for lib_name, deps in lib_deps.iteritems():
        for d in deps:
            mo = LP_RE.match(d)
            if mo is None:
                continue

            counter += 1

            lib = mo.group(1)
            new_fn = os.path.join(FPREFIX, lib)
            missing = lib_deps.get(lib, None) is None
            if missing:
                print 'Library `{0}` is missing, trying to fix'.format(lib)
                for p in LIB_PATHS:
                    fn = os.path.join(p, lib)
                    if os.path.exists(fn):
                        print '   found {0}, copy to {1}'.format(fn, new_fn)
                        shutil.copy(fn, new_fn)
                        os.chmod(new_fn, 0o644)

                        # fix ID
                        cmd = ['install_name_tool', '-id', '@executable_path/../Frameworks/{0}'.format(lib), new_fn]
                        subprocess.check_output(cmd)
            else:
                print 'File `{0}`: referense to shared library broken: `{1}`, trying to fix'.format(os.path.join(FPREFIX, lib_name), lib)
                cmd = ['install_name_tool', '-change', '@loader_path/{0}'.format(lib), '@executable_path/../Frameworks/{0}'.format(lib), \
                    os.path.join(FPREFIX, lib_name)]
                subprocess.check_output(cmd)
    return counter

for x in range(30):
    if iteration(x+1) == 0:
        print 'Finished!'
        break