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- #! /usr/bin/env python
-
- # Module ndiff version 1.7.0
- # Released to the public domain 08-Dec-2000,
- # by Tim Peters (tim.one@home.com).
-
- # Provided as-is; use at your own risk; no warranty; no promises; enjoy!
-
- # ndiff.py is now simply a front-end to the difflib.ndiff() function.
- # Originally, it contained the difflib.SequenceMatcher class as well.
- # This completes the raiding of reusable code from this formerly
- # self-contained script.
-
- """ndiff [-q] file1 file2
- or
- ndiff (-r1 | -r2) < ndiff_output > file1_or_file2
-
- Print a human-friendly file difference report to stdout. Both inter-
- and intra-line differences are noted. In the second form, recreate file1
- (-r1) or file2 (-r2) on stdout, from an ndiff report on stdin.
-
- In the first form, if -q ("quiet") is not specified, the first two lines
- of output are
-
- -: file1
- +: file2
-
- Each remaining line begins with a two-letter code:
-
- "- " line unique to file1
- "+ " line unique to file2
- " " line common to both files
- "? " line not present in either input file
-
- Lines beginning with "? " attempt to guide the eye to intraline
- differences, and were not present in either input file. These lines can be
- confusing if the source files contain tab characters.
-
- The first file can be recovered by retaining only lines that begin with
- " " or "- ", and deleting those 2-character prefixes; use ndiff with -r1.
-
- The second file can be recovered similarly, but by retaining only " " and
- "+ " lines; use ndiff with -r2; or, on Unix, the second file can be
- recovered by piping the output through
-
- sed -n '/^[+ ] /s/^..//p'
- """
-
- __version__ = 1, 7, 0
-
- import difflib, sys
-
- def fail(msg):
- out = sys.stderr.write
- out(msg + "\n\n")
- out(__doc__)
- return 0
-
- # open a file & return the file object; gripe and return 0 if it
- # couldn't be opened
- def fopen(fname):
- try:
- return open(fname, 'r')
- except IOError, detail:
- return fail("couldn't open " + fname + ": " + str(detail))
-
- # open two files & spray the diff to stdout; return false iff a problem
- def fcompare(f1name, f2name):
- f1 = fopen(f1name)
- f2 = fopen(f2name)
- if not f1 or not f2:
- return 0
-
- a = f1.readlines(); f1.close()
- b = f2.readlines(); f2.close()
- for line in difflib.ndiff(a, b):
- print line,
-
- return 1
-
- # crack args (sys.argv[1:] is normal) & compare;
- # return false iff a problem
-
- def main(args):
- import getopt
- try:
- opts, args = getopt.getopt(args, "qr:")
- except getopt.error, detail:
- return fail(str(detail))
- noisy = 1
- qseen = rseen = 0
- for opt, val in opts:
- if opt == "-q":
- qseen = 1
- noisy = 0
- elif opt == "-r":
- rseen = 1
- whichfile = val
- if qseen and rseen:
- return fail("can't specify both -q and -r")
- if rseen:
- if args:
- return fail("no args allowed with -r option")
- if whichfile in "12":
- restore(whichfile)
- return 1
- return fail("-r value must be 1 or 2")
- if len(args) != 2:
- return fail("need 2 filename args")
- f1name, f2name = args
- if noisy:
- print '-:', f1name
- print '+:', f2name
- return fcompare(f1name, f2name)
-
- # read ndiff output from stdin, and print file1 (which=='1') or
- # file2 (which=='2') to stdout
-
- def restore(which):
- restored = difflib.restore(sys.stdin.readlines(), which)
- sys.stdout.writelines(restored)
-
- if __name__ == '__main__':
- args = sys.argv[1:]
- if "-profile" in args:
- import profile, pstats
- args.remove("-profile")
- statf = "ndiff.pro"
- profile.run("main(args)", statf)
- stats = pstats.Stats(statf)
- stats.strip_dirs().sort_stats('time').print_stats()
- else:
- main(args)
-