flipdiff


SYNOPSIS
       flipdiff [[-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]] [--in-place] diff1 diff2

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

DESCRIPTION
       flipdiff exchanges the order of two patch files that apply one after
       the other. The patches must be "clean": the context lines must match
       and there should be no mis-matched offsets.

       The swapped patches are sent to standard output, with a marker line
       ("=== 8< === cut here === 8< ===") between them, unless the --in-place
       option is passed. In that case, the output is written back to the
       original input files.

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.

       --version
           Display the version number of flipdiff.

LIMITATIONS
       This is only been very lightly tested, and may not even work. Using
       --in-place is not recommended at the moment.

       There are some cases in which it is not possible to meaningfully flip
       patches without understanding the semantics of the content. This
       program only uses complete lines that appear at some stage during the
       application of the two patches, and never composes a line from parts.

       Because of this, it is generally a good idea to read through the output
       to check that it makes sense.

AUTHOR
       Tim Waugh <twaugh@redhat.com>
           Package maintainer



patchutils                      23 January 2009                    FLIPDIFF(1)
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