1GDIFFMK(1) General Commands Manual GDIFFMK(1)
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7 gdiffmk [ -aaddmark ] [ -cchangemark ] [ -ddeletemark ] [ -D [ -B ]
8 [ -Mmark1 mark2 ] ] [ -xdiffcmd ] [ -- ] [ --help ]
9 [ --version ] file1 file2 [ output ]
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12 gdiffmk compares two groff(1), nroff(1), or troff(1) documents, file1
13 and file2, and creates an output which is file2 with added `margin
14 character' (.mc) commands that indicate the differences.
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16 If the output filename is present, the output is written there. If it
17 is - or absent the output is written to the standard output.
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19 If the file1 or file2 argument is - the standard input is read for that
20 input. Clearly both cannot be -.
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22 Note that the output is not necessarily compatible with all macro pack‐
23 ages and all preprocessors. See the BUGS section below.
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26 -aaddmark
27 Use the addmark for source lines not in file1 but present in
28 file2. Default: +.
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30 -B By default, the deleted texts marked by the -D option end with
31 an added troff break command, .br, to ensure that the deletions
32 are marked properly. This is the only way to guarantee that
33 deletions and small changes get flagged. This option directs
34 the program not to insert these breaks; it makes no sense to use
35 it without -D.
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37 -cchangemark
38 Use the changemark for changed source lines. Default: |.
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40 -ddeletemark
41 Use the deletemark for deleted source lines. Default: *.
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43 -D Show the deleted portions from changed and deleted text.
44 Default delimiting marks: [[ ... ]].
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46 -Mmark1 mark2
47 Change the delimiting marks for the -D option. It makes no
48 sense to use this option without -D.
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50 -xdiffcmd
51 Use the diffcmd command to perform the comparison of file1 and
52 file2. In particular, diffcmd should accept the GNU diff -Dname
53 option. Default: diff(1).
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55 -- All the following arguments are treated as file names, even if
56 they begin with -.
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58 --help Print a usage message on standard error output and exit.
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60 --version
61 Print version information on the standard output and exit.
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64 The output is not necessarily compatible with all macro packages and
65 all preprocessors. A workaround that is often successful against pre‐
66 processor problems is to run gdiffmk on the output of all the pre‐
67 processors instead of the input source.
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69 gdiffmk relies on the -Dname option of GNU diff(1) to make a merged
70 `#ifdef' output format. It hasn't been tested whether other versions
71 of diff(1) do support this option. See also the -xdiffcmd option.
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73 Report bugs to ⟨bug-groff@gnu.org⟩. Include a complete, self-contained
74 example that will allow the bug to be reproduced, and say which version
75 of gdiffmk you are using.
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78 Copyright © 2004-2014 Free Software Foundation, Inc.
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80 This file is part of the gdiffmk utility, which is part of groff, a
81 free software project.
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83 You can redistribute and/or modify gdiffmk under the terms of the GNU
84 General Public License as published by the Free Software Foundation,
85 either version 3 of the License, or (at your option) any later version.
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87 gdiffmk is distributed in the hope that it will be useful, but WITHOUT
88 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
89 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
90 for more details.
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92 You should have received a copy of the GNU General Public License along
93 with this program. If not, see <http://www.gnu.org/licenses/>.
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96 This document was written and is maintained by Mike Bianchi
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99 groff(1), nroff(1), gtroff(1), diff(1)
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103Groff Version 1.22.3 4 November 2014 GDIFFMK(1)