scripts/chg-len.py
changeset 286 da414906fe21
child 284 a16cc721259e
equal deleted inserted replaced
-1:000000000000 0:6bbe8375268b
       
     1 #! /usr/bin/env python
       
     2 
       
     3 import sys
       
     4 import os
       
     5 
       
     6 if len(sys.argv)>1 and sys.argv[1] in ["-h","--help"]:
       
     7     print """
       
     8 This utility just prints the length of the longest path
       
     9 in the revision graph from revison 0 to the current one.
       
    10 """
       
    11     exit(0)
       
    12 plist = os.popen("hg parents --template='{rev}\n'").readlines()
       
    13 if len(plist)>1:
       
    14     print "You are in the process of merging"
       
    15     exit(1)
       
    16 PAR = int(plist[0])
       
    17 
       
    18 f = os.popen("hg log -r 0:tip --template='{rev} {parents}\n'").readlines()
       
    19 REV = -1
       
    20 lengths=[]
       
    21 for l in f:
       
    22     REV+=1
       
    23     s = l.split()
       
    24     rev = int(s[0])
       
    25     if REV != rev:
       
    26         print "Something is seriously wrong"
       
    27         exit(1)
       
    28     if len(s) == 1:
       
    29         par1 = par2 = rev - 1
       
    30     elif len(s) == 2:
       
    31         par1 = par2 = int(s[1].split(":")[0])
       
    32     else:
       
    33         par1 = int(s[1].split(":")[0])
       
    34         par2 = int(s[2].split(":")[0])
       
    35     if rev == 0:
       
    36         lengths.append(0)
       
    37     else:
       
    38         lengths.append(max(lengths[par1],lengths[par2])+1)
       
    39 print lengths[PAR]