sort-pkgs

   1 #!/usr/bin/python3
   2
   3 """
   4 This script tries to set ordering in which packages ought to be sent to builders.
   5 Input: file with names of packages. If not given packages are read from stdin. One package name per line.
   6 Output: sorted packages on stdout.
   7
   8 If the script goes in a infinite loop, that means there is a cycle or other bug.
   9 """
  10
  11 import os
  12 import re
  13 import sys
  14
  15 BR_PATTERN = re.compile('BuildRequires:\s+(.*?)(\s|$)')
  16 PACKAGE_PATTERN_WITH_N = re.compile('%package\s+-n\s+(.*)')
  17 PACKAGE_PATTERN = re.compile('%package\s+(.*)')
  18
  19 try:
  20     import rpm
  21     DIR = rpm.expandMacro('%_topdir')
  22 except ModuleNotFoundError:
  23     try:
  24         import subprocess
  25         DIR = subprocess.check_output(['rpm', '-E', '%_topdir']).decode('utf-8').strip()
  26     except:
  27         DIR = os.getenv("HOME") + '/rpm/packages'
  28
  29 BUILD_REQUIRES = {}
  30 PACKAGES = {}
  31 SPECS = {}
  32 VISITED = {}
  33
  34
  35 def parse_spec(name):
  36     global PACKAGES, SPECS, BUILD_REQUIRES, VISITED
  37     res = []
  38     try:
  39         with open(os.path.join(DIR, name, name + '.spec'), 'r') as f:
  40             for line in f:
  41                 br = BR_PATTERN.match(line)
  42                 if br:
  43                     p = br.group(1)
  44                     res.append(p)
  45                 if line.startswith('%package'):
  46                     pn = PACKAGE_PATTERN_WITH_N.match(line)
  47                     if pn:
  48                         package = pn.group(1)
  49                         PACKAGES[package] = name
  50                     else:
  51                         pn = PACKAGE_PATTERN.match(line)
  52                         if pn:
  53                             ext = pn.group(1)
  54                             if ext:
  55                                 package = name + '-' + ext
  56                                 PACKAGES[package] = name
  57         BUILD_REQUIRES[name] = res[:]
  58         PACKAGES[name] = name
  59         SPECS[name] = True
  60         VISITED[name] = False
  61     except:
  62         pass
  63
  64
  65 def print_spec(spec):
  66     global PACKAGES, SPECS, BUILD_REQUIRES, VISITED
  67
  68     if not VISITED[spec]:
  69         VISITED[spec] = True
  70         for br in BUILD_REQUIRES[spec]:
  71             name = PACKAGES.get(br, '')
  72             if name in SPECS:
  73                 if not VISITED[name]:
  74                     print_spec(name)
  75         print(spec)
  76
  77
  78 if __name__ == "__main__":
  79     with (len(sys.argv) > 1 and open(sys.argv[1], 'r') or sys.stdin) as f:
  80         for line in f:
  81             spec = os.path.basename(os.path.normpath(line.rstrip())).removesuffix('.spec')
  82             parse_spec(spec)
  83
  84     for spec in SPECS:
  85         print_spec(spec)