|
| 1 | +""" Command line interface to difflib.py providing diffs in three formats: |
| 2 | +
|
| 3 | +* ndiff: lists every line and highlights interline changes. |
| 4 | +* context: highlights clusters of changes in a before/after format |
| 5 | +* unified: highlights clusters of changes in an inline format. |
| 6 | +
|
| 7 | +""" |
| 8 | + |
| 9 | +import sys, os, time, difflib, optparse |
| 10 | + |
| 11 | +usage = "usage: %prog [options] fromfile tofile" |
| 12 | +parser = optparse.OptionParser(usage) |
| 13 | +parser.add_option("-c", action="store_true", default=False, help='Produce a context format diff (default)') |
| 14 | +parser.add_option("-u", action="store_true", default=False, help='Produce a unified format diff') |
| 15 | +parser.add_option("-n", action="store_true", default=False, help='Produce a ndiff format diff') |
| 16 | +parser.add_option("-l", "--lines", type="int", default=3, help='Set number of context lines (default 3)') |
| 17 | +(options, args) = parser.parse_args() |
| 18 | + |
| 19 | +if len(args) == 0: |
| 20 | + parser.print_help() |
| 21 | + sys.exit(1) |
| 22 | +if len(args) != 2: |
| 23 | + parser.error("need to specify both a fromfile and tofile") |
| 24 | + |
| 25 | +n = options.lines |
| 26 | +fromfile, tofile = args |
| 27 | + |
| 28 | +fromdate = time.ctime(os.stat(fromfile).st_mtime) |
| 29 | +todate = time.ctime(os.stat(tofile).st_mtime) |
| 30 | +fromlines = open(fromfile).readlines() |
| 31 | +tolines = open(tofile).readlines() |
| 32 | + |
| 33 | +if options.u: |
| 34 | + diff = difflib.unified_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n) |
| 35 | +elif options.n: |
| 36 | + diff = difflib.ndiff(fromlines, tolines) |
| 37 | +else: |
| 38 | + diff = difflib.context_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n) |
| 39 | + |
| 40 | +sys.stdout.writelines(diff) |
| 41 | + |
0 commit comments