man/check-os-release.py

   1 #!/usr/bin/python
   2 # SPDX-License-Identifier: CC0-1.0
   3
   4 import ast
   5 import re
   6 import sys
   7
   8 def read_os_release():
   9     try:
  10         filename = '/etc/os-release'
  11         f = open(filename)
  12     except FileNotFoundError:
  13         filename = '/usr/lib/os-release'
  14         f = open(filename)
  15
  16     for line_number, line in enumerate(f, start=1):
  17         line = line.rstrip()
  18         if not line or line.startswith('#'):
  19             continue
  20         m = re.match(r'([A-Z][A-Z_0-9]+)=(.*)', line)
  21         if m:
  22             name, val = m.groups()
  23             if val and val[0] in '"\'':
  24                 val = ast.literal_eval(val)
  25             yield name, val
  26         else:
  27             print(f'{filename}:{line_number}: bad line {line!r}',
  28                   file=sys.stderr)
  29
  30 os_release = dict(read_os_release())
  31
  32 pretty_name = os_release.get('PRETTY_NAME', 'Linux')
  33 print(f'Running on {pretty_name!r}')
  34
  35 if 'debian' in [os_release.get('ID', 'linux'),
  36                 *os_release.get('ID_LIKE', '').split()]:
  37     print('Looks like Debian!')