combinediff man page on YellowDog

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COMBINEDIFF(1)			   Man pages			COMBINEDIFF(1)

NAME
       combinediff - create a cumulative unified patch from two incremental
       patches

SYNOPSIS
       combinediff [-p n] [-U n] [-d PAT] [-Bbiqwz] [[--interpolate]
		   [--combine]] diff1 diff2

       combinediff {[--help] [--version]}

DESCRIPTION
       combinediff creates a unified diff that expresses the sum of two diffs.
       The diff files must be listed in the order that they are to be applied.
       For best results, the diffs must have at least three lines of context.

       Since combinediff doesn't have the advantage of being able to look at
       the files that are to be modified, it has stricter requirements on the
       input format than patch(1) does. The output of GNU diff will be okay,
       even with extensions, but if you intend to use a hand-edited patch it
       might be wise to clean up the offsets and counts using recountdiff(1)
       first.

       Note, however, that the two patches must be in strict incremental
       order. In other words, the second patch must be relative to the state
       of the original set of files after the first patch was applied.

       The diffs may be in context format. The output, however, will be in
       unified format.

OPTIONS
       -p n   When comparing filenames, ignore the first n pathname components
	      from both patches. (This is similar to the -p option to GNU
	      patch(1).)

       -q     Quieter output. Don't emit rationale lines at the beginning of
	      each patch.

       -U n   Attempt to display n lines of context (requires at least n lines
	      of context in both input files). (This is similar to the -U
	      option to GNU diff(1).)

       -d pattern
	      Don't display any context on files that match the shell wildcard
	      pattern. This option can be given multiple times.

	      Note that the interpretation of the shell wildcard pattern does
	      not count slash characters or periods as special (in other
	      words, no flags are given to fnmatch). This is so that
	      “*/basename”-type patterns can be given without limiting the
	      number of pathname components.

       -i     Consider upper- and lower-case to be the same.

       -w     Ignore whitespace changes in patches.

       -b     Ignore changes in the amount of whitespace.

       -B     Ignore changes whose lines are all blank.

       -z     Decompress files with extensions .gz and .bz2.

       --interpolate
	      Run as “interdiff”. See interdiff(1) for more information about
	      how the behaviour is altered in this mode.

       --combine
	      Run as “combinediff”. This is the default.

       --help Display a short usage message.

       --version
	      Display the version number of combinediff.

BUGS
       The -U option is a bit erratic: it can control the amount of context
       displayed for files that are modified in both patches, but not for
       files that only appear in one patch (which appear with the same amount
       of context in the output as in the input).

SEE ALSO
       interdiff(1)

AUTHOR
       Tim Waugh <twaugh@redhat.com>.

patchutils			  7 Jul 2003			COMBINEDIFF(1)
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