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       filterdiff [-i PATTERN] [-p n] [--strip=n]
                  [--addprefix=PREFIX] [-x PATTERN] [--verbose]
                  [-v] [-z] [-# RANGE | --hunks=RANGE]
                  [--lines=RANGE] [--annotate] [--format=FORMAT]
                  [--as-numbered-lines=WHEN] [file...]

       filterdiff {--help | --version | --list | --grep ...}


       You  can  use filterdiff to obtain a patch that applies to
       files matching the shell wildcard PATTERN  from  a  larger
       collection  of patches. For example, to see the patches in
       patch-2.4.3.gz that apply to all files called lp.c:

              filterdiff -z -i '*/lp.c' patch-2.4.3.gz

       If neither -i nor -x options are given, -i '*' is assumed.
       To  remove lines from a file that are not part of a patch,
       you might do this:

              filterdiff message > patch

       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.

       You can use both unified and  context  format  diffs  with
       this program.


       -i PATTERN
              Include  only  files  matching  PATTERN.  All other
              lines in the input are suppressed.

       -x PATTERN
              Exclude files matching PATTERN. All other lines  in
              the input are displayed.

              original file that lie within the specified  RANGE.
              Lines  are numbered from 1, and the range is a com­
              ma-separated  list  of  numbers  or  ``first-last''
              spans; either the first or the last in the span may
              be omitted to indicate no limit in that  direction.

              Annotate  each hunk with the filename and hunk num­

              Use specified output format.

              Remove the first n components of pathnames  in  the

              Prefix pathnames in the output by PREFIX.

              Instead  of  a patch fragment, display the lines of
              the selected hunks with the line number of the file
              before (or after) the patch is applied, followed by
              a TAB character and a colon, at  the  beginning  of
              each  line.  Each hunk except the first will have a
              line consisting of ``...'' before it.

       -v, --verbose
              Always show non-diff lines in the  output.  By  de­
              fault, non-diff lines are only shown when excluding
              a filename pattern.

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

       --help Display a short usage message.

              Display the version number of filterdiff.

       --list Behave like lsdiff(1) instead.

              filterdiff -#1 patchfile

       To see patches modifying a ChangeLog file in a subdirecto­
       ry, use:

              filterdiff -p1 Changelog

       To see the complete patches for each patch  that  modifies
       line 1 of the original file, use:

              filterdiff --lines=1 patchfile | lsdiff | \
                xargs -rn1 filterdiff patchfile -i

       To  see  all but the first hunk of a particular patch, you
       might use:

              filterdiff -p1 -i file.c -#2- foo-patch

       If you have a very specific list of hunks in a patch  that
       you want to see, list them:

              filterdiff -#1,2,5-8,10,12,27-

       To  see  the  lines  of the files that would be patched as
       they will appear after the patch is applied, use:

              filterdiff --as-numbered-lines=after patch.file

       You can see the same context before the patch  is  applied

              filterdiff --as-numbered-lines=before


       Tim Waugh <twaugh@redhat.com>.

patchutils                 23 Aug 2002              FILTERDIFF(1)

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