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- MERGE(1) USER COMMANDS MERGE(1)
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- NAME
- merge - three-way file merge
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- SYNOPSIS
- merge [ -L _l_a_b_e_l_1 [ -L _l_a_b_e_l_3 ] ] [ -p ] [ -q ] _f_i_l_e_1 _f_i_l_e_2
- _f_i_l_e_3
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- DESCRIPTION
- merge incorporates all changes that lead from _f_i_l_e_2 to _f_i_l_e_3
- into _f_i_l_e_1. The result goes to standard output if -p is
- present, into _f_i_l_e_1 otherwise. merge is useful for combin-
- ing separate changes to an original. Suppose _f_i_l_e_2 is the
- original, and both _f_i_l_e_1 and _f_i_l_e_3 are modifications of
- _f_i_l_e_2. Then merge combines both changes.
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- An overlap occurs if both _f_i_l_e_1 and _f_i_l_e_3 have changes in a
- common segment of lines. On a few older hosts where diff3
- does not support the -E option, merge does not detect over-
- laps, and merely supplies the changed lines from _f_i_l_e_3. On
- most hosts, if overlaps occur, merge outputs a message
- (unless the -q option is given), and includes both alterna-
- tives in the result. The alternatives are delimited as fol-
- lows:
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- <<<<<<< _f_i_l_e_1
- _l_i_n_e_s _i_n _f_i_l_e_1
- =======
- _l_i_n_e_s _i_n _f_i_l_e_3
- >>>>>>> _f_i_l_e_3
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- If there are overlaps, the user should edit the result and
- delete one of the alternatives. If the -L _l_a_b_e_l_1 and
- -L _l_a_b_e_l_3 options are given, the labels are output in place
- of the names _f_i_l_e_1 and _f_i_l_e_3 in overlap reports.
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- DIAGNOSTICS
- Exit status is 0 for no overlaps, 1 for some overlaps, 2 for
- trouble.
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- IDENTIFICATION
- Author: Walter F. Tichy.
- Revision Number: 5.3; Release Date: 1991/02/28.
- Copyright c 1982, 1988, 1989 by Walter F. Tichy.
- Copyright c 1990, 1991 by Paul Eggert.
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- SEE ALSO
- diff3(1), diff(1), rcsmerge(1), co(1).
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- GNU Last change: 1991/02/28 1
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