6 git-merge-file - Run a three-way file merge
12 'git merge-file' [-L <current-name> [-L <base-name> [-L <other-name>]]]
13 [--ours|--theirs|--union] [-p|--stdout] [-q|--quiet] [--marker-size=<n>]
14 [--[no-]diff3] [--object-id] <current> <base> <other>
19 Given three files `<current>`, `<base>` and `<other>`,
20 'git merge-file' incorporates all changes that lead from `<base>`
21 to `<other>` into `<current>`. The result ordinarily goes into
22 `<current>`. 'git merge-file' is useful for combining separate changes
23 to an original. Suppose `<base>` is the original, and both
24 `<current>` and `<other>` are modifications of `<base>`,
25 then 'git merge-file' combines both changes.
27 A conflict occurs if both `<current>` and `<other>` have changes
28 in a common segment of lines. If a conflict is found, 'git merge-file'
29 normally outputs a warning and brackets the conflict with lines containing
30 <<<<<<< and >>>>>>> markers. A typical conflict will look like this:
38 If there are conflicts, the user should edit the result and delete one of
39 the alternatives. When `--ours`, `--theirs`, or `--union` option is in effect,
40 however, these conflicts are resolved favouring lines from `<current>`,
41 lines from `<other>`, or lines from both respectively. The length of the
42 conflict markers can be given with the `--marker-size` option.
44 If `--object-id` is specified, exactly the same behavior occurs, except that
45 instead of specifying what to merge as files, it is specified as a list of
46 object IDs referring to blobs.
48 The exit value of this program is negative on error, and the number of
49 conflicts otherwise (truncated to 127 if there are more than that many
50 conflicts). If the merge was clean, the exit value is 0.
52 'git merge-file' is designed to be a minimal clone of RCS 'merge'; that is, it
53 implements all of RCS 'merge''s functionality which is needed by
61 Specify the contents to merge as blobs in the current repository instead of
62 files. In this case, the operation must take place within a valid repository.
64 If the `-p` option is specified, the merged file (including conflicts, if any)
65 goes to standard output as normal; otherwise, the merged file is written to the
66 object store and the object ID of its blob is written to standard output.
69 This option may be given up to three times, and
70 specifies labels to be used in place of the
71 corresponding file names in conflict reports. That is,
72 `git merge-file -L x -L y -L z a b c` generates output that
73 looks like it came from files x, y and z instead of
74 from files a, b and c.
77 Send results to standard output instead of overwriting
81 Quiet; do not warn about conflicts.
84 Show conflicts in "diff3" style.
87 Show conflicts in "zdiff3" style.
92 Instead of leaving conflicts in the file, resolve conflicts
93 favouring our (or their or both) side of the lines.
95 --diff-algorithm={patience|minimal|histogram|myers}::
96 Use a different diff algorithm while merging. The current default is "myers",
97 but selecting more recent algorithm such as "histogram" can help
98 avoid mismerges that occur due to unimportant matching lines
99 (such as braces from distinct functions). See also
100 linkgit:git-diff[1] `--diff-algorithm`.
105 `git merge-file README.my README README.upstream`::
107 combines the changes of README.my and README.upstream since README,
108 tries to merge them and writes the result into README.my.
110 `git merge-file -L a -L b -L c tmp/a123 tmp/b234 tmp/c345`::
112 merges tmp/a123 and tmp/c345 with the base tmp/b234, but uses labels
113 `a` and `c` instead of `tmp/a123` and `tmp/c345`.
115 `git merge-file -p --object-id abc1234 def567 890abcd`::
117 combines the changes of the blob abc1234 and 890abcd since def567,
118 tries to merge them and writes the result to standard output
122 Part of the linkgit:git[1] suite