.ds Rv 5.10.1 .ds Dt 2022-02-03 .ds i \&\s-1ISO\s0 .ds r \&\s-1RCS\s0 .ds u \&\s-1UTC\s0 .ds o \*r file .if n .ds - \%-- .if t .ds - \(em .TH RCSMERGE 1 "\*(Dt" "GNU RCS \*(Rv" .SH NAME rcsmerge \- merge RCS revisions .SH SYNOPSIS .B rcsmerge .RI [ options ] " file" .SH DESCRIPTION .B rcsmerge incorporates the changes between two revisions of an \*o into the corresponding working file. .PP Filenames matching an \*r suffix denote \*os; all others denote working files. Names are paired as explained in .BR ci (1). .PP At least one revision must be specified with one of the options described below, usually .BR \-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. .PP .B rcsmerge prints a warning if there are overlaps, and delimits the overlapping regions as explained in .BR merge (1). The command is useful for incorporating changes into a checked-out revision. .SH OPTIONS .TP .B \-A Output conflicts using the .B \-A style of .BR diff3 (1), if supported by .BR diff3 . This merges all changes leading from .I file2 to .I file3 into .IR file1 , and generates the most verbose output. .TP \f3\-E\fP, \f3\-e\fP These options specify conflict styles that generate less information than .BR \-A . See .BR diff3 (1) for details. The default is .BR \-E . With .BR \-e , .B rcsmerge does not warn about conflicts. .TP .BI \-k subst Use .I subst style keyword substitution. See .BR co (1) for details. For example, .B "\-kk\ \-r1.1\ \-r1.2" ignores differences in keyword values when merging the changes from .B 1.1 to .BR 1.2 . It normally does not make sense to merge binary files as if they were text, so .B rcsmerge refuses to merge files if .B \-kb expansion is used. .TP .BR \-p [\f2rev\fP] Send the result to standard output instead of overwriting the working file. .TP .BR \-q [\f2rev\fP] Run quietly; do not print diagnostics. .TP .BR \-r [\f2rev\fP] Merge with respect to revision .IR rev . Here an empty .I rev stands for the latest revision on the default branch, normally the head. .TP .B \-T This option has no effect; it is present for compatibility with other \*r commands. .TP .BI \-V Print \*r's version number. .TP .BI \-V n Emulate \*r version .IR n . See .BR co (1) for details. .TP .BI \-x "suffixes" Use .I suffixes to characterize \*os. See .BR ci (1) for details. .TP .BI \-z zone Use .I zone as the time zone for keyword substitution. See .BR co (1) for details. .SH EXAMPLES Suppose you have released revision 2.8 of .BR 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 .LP .B " rcsmerge \-p \-r2.8 \-r3.4 f.c >f.merged.c" .PP Then examine .BR f.merged.c . Alternatively, if you want to save the updates to 2.8 in the \*o, check them in as revision 2.8.1.1 and execute .BR "co \-j": .LP .B " ci \-r2.8.1.1 f.c" .br .B " co \-r3.4 \-j2.8:2.8.1.1 f.c" .PP As another example, the following command undoes the changes between revision 2.4 and 2.8 in your currently checked out revision in .BR f.c . .LP .B " rcsmerge \-r2.8 \-r2.4 f.c" .PP Note the order of the arguments, and that .B f.c will be overwritten. .SH ENVIRONMENT .TP .B \s-1RCSINIT\s0 Options prepended to the argument list, separated by spaces. A backslash escapes spaces within an option. The .B \s-1RCSINIT\s0 options are prepended to the argument lists of most \*r commands. Useful .B \s-1RCSINIT\s0 options include .BR \-q , .BR \-V , .BR \-x , and .BR \-z . .TP .B \s-1RCS_MEM_LIMIT\s0 Normally, for speed, commands either memory map or copy into memory the \*o if its size is less than the .IR 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 .B \s-1RCS_MEM_LIMIT\s0 to a numeric value .IR lim (measured in kilobytes). An empty value is silently ignored. As a side effect, specifying .B \s-1RCS_MEM_LIMIT\s0 inhibits fall-back to slower routines. .TP .B \s-1TMPDIR\s0 Name of the temporary directory. If not set, the environment variables .B \s-1TMP\s0 and .B \s-1TEMP\s0 are inspected instead and the first value found is taken; if none of them are set, a host-dependent default is used, typically .BR /tmp . .SH DIAGNOSTICS Exit status is 0 for no overlaps, 1 for some overlaps, 2 for trouble. .ds EY 1990, 1991, 1992, 1993, 1994, 1995 .SH IDENTIFICATION Author: Walter F. Tichy. .br Manual Page Revision: \*(Rv; Release Date: \*(Dt. .br Copyright \(co 2010-2022 Thien-Thi Nguyen. .br Copyright \(co \*(EY Paul Eggert. .br Copyright \(co 1982, 1988, 1989 Walter F. Tichy. .br .SH "SEE ALSO" .BR ci (1), .BR co (1), .BR ident (1), .BR merge (1), .BR rcs (1), .BR rcsdiff (1), .BR rlog (1), .BR rcsfile (5). .PP Walter F. Tichy, \*r\*-A System for Version Control, .I "Software\*-Practice & Experience" .BR 15 , 7 (July 1985), 637-654. .PP The full documentation for \*r is maintained as a Texinfo manual. If the .BR info (1) and \*r programs are properly installed at your site, the command .IP .B info rcs .PP should give you access to the complete manual. Additionally, the \*r homepage: .IP .B http://www.gnu.org/software/rcs/ .PP has news and links to the latest release, development site, etc.