merge - three-way file merge
merge [ options ] file1 file2 file3
merge incorporates all changes that lead from file2 to file3 into
file1. The result ordinarily goes into file1. merge is useful for
combining separate changes to an original. Suppose file2 is the origi-
nal, and both file1 and file3 are modifications of file2. Then merge
combines both changes.
A conflict occurs if both file1 and file3 have changes in a common seg-
ment of lines. If a conflict is found, merge normally outputs a warn-
ing and brackets the conflict with <<<<<<< and >>>>>>> lines. A typi-
cal conflict will look like this:
<<<<<<< file A
lines in file A
lines in file B
>>>>>>> file B
If there are conflicts, the user should edit the result and delete one
of the alternatives.
-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 infor-
mation than -A. See diff3(1) for details. The default is -E.
With -e, merge does not warn about conflicts.
This option may be given up to three times, and specifies labels
to be used in place of the corresponding file names in conflict
reports. That is, merge -L x -L y -L z a b c generates output
that looks like it came from files x, y and z instead of from
files a, b and c.
-p Send results to standard output instead of overwriting file1.
-q Quiet; do not warn about conflicts. -V Print 's version number.
Exit status is 0 for no conflicts, 1 for some conflicts, 2 for trouble.
Author: Walter F. Tichy.
Manual Page Revision: 5.7; Release Date: 1995/06/01.
Copyright (C) 1982, 1988, 1989 Walter F. Tichy.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.
diff3(1), diff(1), rcsmerge(1), co(1).
It normally does not make sense to merge binary files as if they were
text, but merge tries to do it anyway.
GNU 1995/06/01 MERGE(1)