COMBINEDIFF(1)                     Man pages                    COMBINEDIFF(1)

       combinediff - create a cumulative unified patch from two incremental

       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

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

       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)

       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.

       -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

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

       -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

       -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.

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

           Run as "combinediff". This is the default.

           Display a short usage message.

           Display the version number of combinediff.

       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).


       Tim Waugh <>
           Package maintainer

patchutils                        23 Jan 2009                   COMBINEDIFF(1)
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