FILTERDIFF(1) Man pages FILTERDIFF(1)NAMEfilterdiff - extract or exclude diffs from a diff file
SYNOPSISfilterdiff [-i PATTERN] [-p n] [--strip=n] [--addprefix=PREFIX]
[-x PATTERN] [--verbose] [-v] [-z] [[-# RANGE]
[--hunks=RANGE]] [--lines=RANGE] [--files=RANGE]
[--annotate] [--format=FORMAT] [--as-numbered-lines=WHEN]
[--remove-timestamps] [file...]
filterdiff {[--help] [--version] [--list] [--grep ...]}
DESCRIPTION
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. This way
filterdiff can be used to clean up an existing diff file, removing
redundant lines from the beginning (eg. the text from the mail body) or
between the chunks (eg. in CVS diffs). To extract pure patch data, use
a command like this:
filterdiff message-with-diff-in-the-body > 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.
OPTIONS-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.
-p n When matching, ignore the first n components of the pathname.
-# RANGE | --hunks=RANGE
Only include hunks within the specified RANGE. Hunks are
numbered from 1, and the range is a comma-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.
--lines=RANGE
Only include hunks that contain lines from the original file
that lie within the specified RANGE. Lines are numbered from 1,
and the range is a comma-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.
--files=RANGE
Only include files indicated by the specified RANGE. Files are
numbered from 1 in the order they appear in the patch input, and
the range is a comma-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
Annotate each hunk with the filename and hunk number.
--format=unified|context
Use specified output format.
--strip=n
Remove the first n components of pathnames in the output.
--addprefix=PREFIX
Prefix pathnames in the output by PREFIX.
--as-numbered-lines=before|after
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.
--remove-timestamps
Do not include file timestamps in the output.
-v, --verbose
Always show non-diff lines in the output. By default, 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.
--version
Display the version number of filterdiff.
--list Behave like lsdiff(1) instead.
--grep Behave like grepdiff(1) instead.
EXAMPLES
To see all patch hunks that affect the first five lines of a C file:
filterdiff-i '*.c' --lines=-5 < patch
To see the first hunk of each file patch, use:
filterdiff -#1 patchfile
To see patches modifying a ChangeLog file in a subdirectory, 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 -rn1filterdiff 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 with:
filterdiff --as-numbered-lines=before
patch.file
Filterdiff can also be used to convert between unified and context
format diffs:
filterdiff-v --format=unified context.diff
SEE ALSOlsdiff(1), grepdiff(1)AUTHOR
Tim Waugh <twaugh@redhat.com>.
patchutils 7 May 2004 FILTERDIFF(1)
