script/compare_cc_results.py

   1 #!/usr/bin/env python3
   2 """Compare the results of native and cross-compiled configure tests
   3
   4 The compared files are called "default.cache.py" and are generated in
   5 bin/c4che/.
   6
   7 USAGE: compare_cc_results.py CONFIG_1 CONFIG_2 [CONFIG_3 [CONFIG_4 ...]]
   8 """
   9 from __future__ import print_function
  10 import sys
  11 import difflib
  12
  13 exceptions = [
  14     'BUILD_DIRECTORY', 'SELFTEST_PREFIX', 'defines',
  15     'CROSS_COMPILE', 'CROSS_ANSWERS', 'CROSS_EXECUTE',
  16     'LIBSOCKET_WRAPPER_SO_PATH',
  17     'LIBNSS_WRAPPER_SO_PATH',
  18     'LIBPAM_WRAPPER_SO_PATH',
  19     'PAM_SET_ITEMS_SO_PATH',
  20     'LIBUID_WRAPPER_SO_PATH',
  21     'LIBRESOLV_WRAPPER_SO_PATH',
  22 ]
  23
  24 if len(sys.argv) < 3:
  25     print(__doc__)
  26     sys.exit(1)
  27
  28 base_lines = list()
  29 base_fname = ''
  30
  31 found_diff = False
  32
  33 for fname in sys.argv[1:]:
  34     lines = list()
  35     f = open(fname, 'r')
  36     for line in f:
  37         if line.startswith("cfg_files ="):
  38             # waf writes configuration files as absolute paths
  39             continue
  40         if len(line.split('=', 1)) == 2:
  41             key = line.split('=', 1)[0].strip()
  42             value = line.split('=', 1)[1].strip()
  43             if key in exceptions:
  44                 continue
  45             # using waf with python 3.4 seems to randomly sort dict keys
  46             # we can't modify the waf code but we can fake a dict value
  47             # string representation as if it were sorted. python 3.6.5
  48             # doesn't seem to suffer from this behaviour
  49             if value.startswith('{'):
  50                 import ast
  51                 amap = ast.literal_eval(value)
  52                 fakeline = ""
  53                 for k in sorted(amap.keys()):
  54                     if not len(fakeline) == 0:
  55                         fakeline = fakeline + ", "
  56                     fakeline = fakeline + '\'' + k + '\': \'' + amap[k] + '\''
  57                 line = key + ' = {' + fakeline + '}'
  58         lines.append(line)
  59     f.close()
  60     if base_fname:
  61         diff = list(difflib.unified_diff(base_lines, lines, base_fname, fname))
  62         if diff:
  63             print('configuration files %s and %s do not match' % (base_fname, fname))
  64             for l in diff:
  65                 sys.stdout.write(l)
  66             found_diff = True
  67     else:
  68         base_fname = fname
  69         base_lines = lines
  70
  71 if found_diff:
  72     sys.exit(1)