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interdiff (1)
  • >> interdiff (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
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    NAME

    interdiff - show differences between two diff files
     
    

    SYNOPSIS

    interdiff [-p n] [-U n] [-d PAT] [-Bbiqwz] [[--interpolate] [--combine] [--flip]] [--no-revert-omitted] diff1 diff2
    interdiff {[--help] [--version]}
     

    DESCRIPTION

    interdiff

    creates a unified format diff that expresses the difference between two diffs. The diffs must both be relative to the same files. For best results, the diffs must have at least three lines of context.

    To reverse a patch, use /dev/null for diff2.

    To reduce the amount of context in a patch, use:

    interdiff -U1 /dev/null patchfile
    

    Since interdiff 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 both be relative to the versions of the same original set of files.

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

    OPTIONS

    -h
    Ignored, for compatibility with older versions of interdiff. This option will go away soon.
    -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 lq*/basenamerq-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 lqinterdiffrq. This is the default.
    --combine
    Run as lqcombinediffrq. See combinediff(1) for more information about how the behaviour is altered in this mode.
    --no-revert-omitted
    (For interpolation mode only) When a file is changed by the first patch but not by the second, don't revert that change.
    --help
    Display a short usage message.
    --version
    Display the version number of interdiff.
     

    EXAMPLES

    Basic usage:

    interdiff -z 3.2pre1.patch.gz 3.2pre2.patch.gz
    

    Reversing a patch:

    interdiff patch /dev/null
    

    Reversing part of a patch (and ignoring the rest):

    filterdiff -i file.c patchfile | \
      interdiff /dev/stdin /dev/null
    
     

    BUGS

    There are currently no known bugs in interdiff; but there are some caveats. If you find a bug, please report it (along with a minimal test case) to Tim Waugh <twaugh@redhat.com>.

    There are some sets of patches in which there is just not enough information to produce a proper interdiff. In this case, the strategy employed is to revert the original patch and apply the new patch. This, unfortunately, means that interdiffs are not guaranteed to be reversible.  

    SEE ALSO

    combinediff(1)  

    AUTHOR

    Tim Waugh <twaugh@redhat.com>.
    Michael K. Johnson <johnsonm@redhat.com>. (man page)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    EXAMPLES
    BUGS
    SEE ALSO
    AUTHOR


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