support/json-rsync-version

   1 #!/usr/bin/env python3
   2
   3 import sys, argparse, subprocess, json
   4
   5 TWEAK_NAME = {
   6         'asm': 'asm_roll',
   7         'ASM': 'asm_roll',
   8         'hardlink_special': 'hardlink_specials',
   9         'protect_args': 'secluded_args',
  10         'protected_args': 'secluded_args',
  11         'SIMD': 'SIMD_roll',
  12     }
  13
  14 MOVE_OPTIM = set('asm_roll SIMD_roll'.split())
  15
  16 def main():
  17     if not args.rsync or args.rsync == '-':
  18         ver_out = sys.stdin.read().strip()
  19     else:
  20         ver_out = subprocess.check_output([args.rsync, '--version', '--version'], encoding='utf-8').strip()
  21     if ver_out.startswith('{'):
  22         print(ver_out)
  23         return
  24     info = { }
  25     misplaced_optims = { }
  26     for line in ver_out.splitlines():
  27         if line.startswith('rsync '):
  28             prog, vstr, ver, pstr, vstr2, proto = line.split()
  29             info['program'] = prog
  30             if ver.startswith('v'):
  31                 ver = ver[1:]
  32             info[vstr] = ver
  33             if '.' not in proto:
  34                 proto += '.0'
  35             else:
  36                 proto = proto.replace('.PR', '.')
  37             info[pstr] = proto
  38         elif line.startswith('Copyright '):
  39             info['copyright'] = line[10:]
  40         elif line.startswith('Web site: '):
  41             info['url'] = line[10:]
  42         elif line.startswith('  '):
  43             if not saw_comma and ',' in line:
  44                 saw_comma = True
  45                 info[sect_name] = { }
  46             if saw_comma:
  47                 for x in line.strip(' ,').split(', '):
  48                     if ' ' in x:
  49                         val, var = x.split(' ', 1)
  50                         if val == 'no':
  51                             val = False
  52                         elif val.endswith('-bit'):
  53                             var = var[:-1] + '_bits'
  54                             val = int(val.split('-')[0])
  55                     else:
  56                         var = x
  57                         val = True
  58                     var = var.replace(' ', '_').replace('-', '_')
  59                     if var in TWEAK_NAME:
  60                         var = TWEAK_NAME[var]
  61                     if sect_name[0] != 'o' and var in MOVE_OPTIM:
  62                         misplaced_optims[var] = val
  63                     else:
  64                         info[sect_name][var] = val
  65             else:
  66                 info[sect_name] += [ x for x in line.split() if not x.startswith('(') ]
  67         elif line == '':
  68             break
  69         else:
  70             sect_name = line.strip(' :').replace(' ', '_').lower()
  71             info[sect_name] = [ ]
  72             saw_comma = False
  73     for chk in 'capabilities optimizations'.split():
  74         if chk not in info:
  75             info[chk] = { }
  76     if misplaced_optims:
  77         info['optimizations'].update(misplaced_optims)
  78     for chk in 'checksum_list compress_list daemon_auth_list'.split():
  79         if chk not in info:
  80             info[chk] = [ ]
  81     info['license'] = 'GPLv3' if ver[0] == '3' else 'GPLv2'
  82     info['caveat'] = 'rsync comes with ABSOLUTELY NO WARRANTY'
  83     print(json.dumps(info))
  84
  85
  86 if __name__ == '__main__':
  87     parser = argparse.ArgumentParser(description="Output rsync's version data in JSON format, even if the rsync doesn't support a native json-output method.", add_help=False)
  88     parser.add_argument('rsync', nargs='?', help="Specify an rsync command to run. Otherwise stdin is consumed.")
  89     parser.add_argument("--help", "-h", action="help", help="Output this help message and exit.")
  90     args = parser.parse_args()
  91     main()
  92
  93 # vim: sw=4 et