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