mdw@git.distorted.org.uk Git - termux-packages/blob - scripts/apt-compare-versions

   1 #!/usr/bin/env python3
   2 # apt-compare-versions: Simple script which takes two arguments and compares
   3 # their version according to apt rules. This can be used to verify the ordering
   4 # between two versions.
   5 #
   6 # Note that ~ (tilde) construct, which allows for beta and preview releases.
   7 # A version with ~ is considered earlier than one without, so 1.6~beta1 is
   8 # considered earlier than 1.6. If both versions contains ~ the version comparison
   9 # is made first on the part preceding the tilde, then the part coming after,
  10 # so 1.6~beta1 comes before 1.6~beta2.
  11
  12 import apt_pkg, sys
  13 apt_pkg.init_system()
  14
  15 if len(sys.argv) != 3:
  16         sys.exit('usage: apt-compare-versions <first-version> <second-version>')
  17
  18 version1 = sys.argv[1]
  19 version2 = sys.argv[2]
  20
  21 comparison_result =  apt_pkg.version_compare(version1, version2)
  22 if comparison_result > 0:
  23         operator = ' > '
  24 elif comparison_result < 0:
  25         operator = ' < '
  26 elif comparison_result == 0:
  27         operator = ' == '
  28
  29 print(version1 + operator + version2)