53 lines
2 KiB
Python
53 lines
2 KiB
Python
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#!/usr/bin/env python
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""" Command line interface to difflib.py providing diffs in four formats:
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* ndiff: lists every line and highlights interline changes.
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* context: highlights clusters of changes in a before/after format.
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* unified: highlights clusters of changes in an inline format.
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* html: generates side by side comparison with change highlights.
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"""
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import sys, os, time, difflib, optparse
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def main():
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usage = "usage: %prog [options] fromfile tofile"
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parser = optparse.OptionParser(usage)
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parser.add_option("-c", action="store_true", default=False, help='Produce a context format diff (default)')
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parser.add_option("-u", action="store_true", default=False, help='Produce a unified format diff')
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parser.add_option("-m", action="store_true", default=False, help='Produce HTML side by side diff (can use -c and -l in conjunction)')
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parser.add_option("-n", action="store_true", default=False, help='Produce a ndiff format diff')
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parser.add_option("-l", "--lines", type="int", default=3, help='Set number of context lines (default 3)')
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(options, args) = parser.parse_args()
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if len(args) == 0:
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parser.print_help()
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sys.exit(1)
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if len(args) != 2:
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parser.error("need to specify both a fromfile and tofile")
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n = options.lines
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fromfile, tofile = args
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fromdate = time.ctime(os.stat(fromfile).st_mtime)
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todate = time.ctime(os.stat(tofile).st_mtime)
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with open(fromfile, 'U') as f:
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fromlines = f.readlines()
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with open(tofile, 'U') as f:
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tolines = f.readlines()
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if options.u:
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diff = difflib.unified_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)
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elif options.n:
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diff = difflib.ndiff(fromlines, tolines)
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elif options.m:
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diff = difflib.HtmlDiff().make_file(fromlines,tolines,fromfile,tofile,context=options.c,numlines=n)
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else:
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diff = difflib.context_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)
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sys.stdout.writelines(diff)
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if __name__ == '__main__':
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main()
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