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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] | [--strip-match=n]] [[-U n] | [--unified=n]] [[-d PAT] |
		   [--drop-context=PAT]] [[-q] | [--quiet]] [[-z] | [--decompress]] [[-b] |
		   [--ignore-space-change]] [[-B] | [--ignore-blank-lines]] [[-i] |
		   [--ignore-case]] [[-w] | [--ignore-all-space]] [[--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, --strip-match=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, --quiet
	   Quieter output. Don't emit rationale lines at the beginning of each patch.

       -U n, --unified=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, --drop-context=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, --ignore-case
	   Consider upper- and lower-case to be the same.

       -w, --ignore-all-space
	   Ignore whitespace changes in patches.

       -b, --ignore-space-change
	   Ignore changes in the amount of whitespace.

       -B, --ignore-blank-lines
	   Ignore changes whose lines are all blank.

       -z, --decompress
	   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>
	   Package maintainer

patchutils				   23 Jan 2009				   COMBINEDIFF(1)
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