kc3-lang/harfbuzz/util/hb-diff

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• Hash : e700bce1
  Author :
  Date : 2011-09-20T11:20:53
  

  [util] Add hb-diff
  
  A diff program written in Python that is more suitable for comparing
  hb-shape output from different backends.  Main differences with stock
  diff:
  
  1. It outputs one line's comparison at a time, as opposed to batching
  '+' lines and '-' lines.
  
  2. It colors the part of the line that changed, taking word boundaries
  into consideration.
  
  You can pipe the colored output to 'less -r'.
  

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• util/hb-diff

• #!/usr/bin/python
  
  import sys, re, difflib, os
  
  red_color = green_color = end_color = ""
  if 1 or os.isatty (sys.stdout.fileno ()):
  	red_color = '\033[41;37;1m'
  	green_color = '\033[42;37;1m'
  	end_color = '\033[m'
  
  def fancy_diff (l1, l2):
  
  	sep = "|<>@+,="
  	r ="(["+sep+"]?)([^"+sep+"]*)"
  	ss = [re.findall (r, l) for l in (l1, l2)]
  	ss = [reduce ((lambda a,b: a+b), s) for s in ss]
  	ss = [[x+"\n" for x in s] for s in ss]
  	oo = ["",""]
  	st = [0,0]
  	for l in difflib.Differ().compare (*ss):
  		if l[0] == '?':
  			continue
  		if l[0] == ' ':
  			for i in range(2):
  				if st[i]:
  					oo[i] += end_color
  					st[i] = 0
  			oo = [o + l[2:] for o in oo]
  			continue
  		if l[0] == '-':
  			if not st[0]:
  				oo[0] += red_color
  				st[0] = 1
  			oo[0] += l[2:]
  			continue
  		if l[0] == '+':
  			if not st[1]:
  				oo[1] += green_color
  				st[1] = 1
  			oo[1] += l[2:]
  	for i in range(2):
  		if st[i]:
  			oo[i] += end_color
  			st[i] = 0
  	oo = [o.replace ('\n', '') for o in oo]
  	if oo[0] == oo[1]:
  		return '  ' + oo[0] + '\n'
  	return '-'+oo[0]+'\n'+'+'+oo[1]+'\n'
  
  
  f1, f2 = (file (f) for f in sys.argv[1:3])
  
  for (l1,l2) in zip (f1, f2):
  	if l1 == l2:
  		print " " + l1.strip ()
  		continue
  	l1, l2 = l1.strip (), l2.strip ()
  
  	sys.stdout.writelines (fancy_diff (l1, l2))
  

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