Ubuntu Manpage: rcsmerge - merge RCS revisions

NAME

       rcsmerge - merge RCS revisions

SYNOPSIS

       rcsmerge [options] file

DESCRIPTION

       rcsmerge  incorporates  the  changes  between two revisions of an RCS file into the corresponding working
       file.

       Filenames matching an RCS suffix denote RCS files; all others denote working files.  Names are paired  as
       explained in ci(1).

       At least one revision must be specified with one of the options described below, usually -r.  At most two
       revisions may be specified.  If only one revision is specified, the latest revision on the default branch
       (normally  the  highest  branch  on  the  trunk)  is  assumed  for the second revision.  Revisions may be
       specified numerically or symbolically.

       rcsmerge prints a warning if there are overlaps, and delimits the overlapping  regions  as  explained  in
       merge(1).  The command is useful for incorporating changes into a checked-out revision.

OPTIONS

-A Output conflicts using the -A style of diff3(1), if supported by diff3. This merges all changes
leading from file2 to file3 into file1, and generates the most verbose output.

-E, -e These options specify conflict styles that generate less information than -A. See diff3(1) for
details. The default is -E. With -e, rcsmerge does not warn about conflicts.

-ksubst
Use subst style keyword substitution. See co(1) for details. For example, -kk -r1.1 -r1.2
ignores differences in keyword values when merging the changes from 1.1 to 1.2. It normally does
not make sense to merge binary files as if they were text, so rcsmerge refuses to merge files if
-kb expansion is used.

-p[rev]
Send the result to standard output instead of overwriting the working file.

-q[rev]
Run quietly; do not print diagnostics.

-r[rev]
Merge with respect to revision rev. Here an empty rev stands for the latest revision on the
default branch, normally the head.

-T This option has no effect; it is present for compatibility with other RCS commands.

-V Print RCS's version number.

-Vn Emulate RCS version n. See co(1) for details.

-xsuffixes
Use suffixes to characterize RCS files. See ci(1) for details.

-zzone Use zone as the time zone for keyword substitution. See co(1) for details.

EXAMPLES

       Suppose  you have released revision 2.8 of f.c.  Assume furthermore that after you complete an unreleased
       revision 3.4, you receive updates to release 2.8 from someone else.  To combine the updates  to  2.8  and
       your changes between 2.8 and 3.4, put the updates to 2.8 into file f.c and execute

           rcsmerge  -p  -r2.8  -r3.4  f.c  >f.merged.c

       Then  examine  f.merged.c.   Alternatively, if you want to save the updates to 2.8 in the RCS file, check
       them in as revision 2.8.1.1 and execute co -j:

           ci  -r2.8.1.1  f.c
           co  -r3.4  -j2.8:2.8.1.1  f.c

       As another example, the following command undoes the  changes  between  revision  2.4  and  2.8  in  your
       currently checked out revision in f.c.

           rcsmerge  -r2.8  -r2.4  f.c

       Note the order of the arguments, and that f.c will be overwritten.

ENVIRONMENT

       RCSINIT
              Options prepended to the argument list, separated by spaces.  A backslash escapes spaces within an
              option.   The  RCSINIT  options  are prepended to the argument lists of most RCS commands.  Useful
              RCSINIT options include -q, -V, -x, and -z.

       RCS_MEM_LIMIT
              Normally, for speed, commands either memory map or copy into memory the RCS file if  its  size  is
              less  than  the  memory-limit,  currently  defaulting  to  ``unlimited''.   Otherwise  (or  if the
              initially-tried speedy ways fail), the commands fall back to using standard i/o routines.  You can
              adjust the memory limit by setting RCS_MEM_LIMIT to a numeric value lim (measured  in  kilobytes).
              An empty value is silently ignored.  As a side effect, specifying RCS_MEM_LIMIT inhibits fall-back
              to slower routines.

       TMPDIR Name of the temporary directory.  If not set, the environment variables TMP and TEMP are inspected
              instead  and  the first value found is taken; if none of them are set, a host-dependent default is
              used, typically /tmp.

DIAGNOSTICS

       Exit status is 0 for no overlaps, 1 for some overlaps, 2 for trouble.

IDENTIFICATION

       Author: Walter F. Tichy.
       Manual Page Revision: 5.10.1; Release Date: 2022-02-19.
       Copyright © 2010-2022 Thien-Thi Nguyen.
       Copyright © 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.
       Copyright © 1982, 1988, 1989 Walter F. Tichy.