mirror of
https://github.com/git/git.git
synced 2024-11-28 04:23:30 +08:00
e34f80278e
Git-merge-file is documented to return one of three exit codes: - zero means the merge was successful - a negative number means an error occurred - a positive number indicates the number of conflicts Unfortunately, this all gets stuffed into an 8-bit return code. Which means that if you have 256 conflicts, this wraps to zero, and the merge appears to succeed (and commits a blob full of conflict-marker cruft!). This patch clamps the return value to a maximum of 127, which we should be able to safely represent everywhere. This also leaves 128-255 for other values. Shells (and some parts of git) will typically represent signal death as 128 plus the signal number. And negative values are typically coerced to an 8-bit unsigned value (so "return -1" ends up as 255). Technically negative returns have the same problem (e.g., "-256" wraps back to 0), but this is not a problem in practice, as the only negative value we use is "-1". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
96 lines
2.8 KiB
Plaintext
96 lines
2.8 KiB
Plaintext
git-merge-file(1)
|
|
=================
|
|
|
|
NAME
|
|
----
|
|
git-merge-file - Run a three-way file merge
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git merge-file' [-L <current-name> [-L <base-name> [-L <other-name>]]]
|
|
[--ours|--theirs|--union] [-p|--stdout] [-q|--quiet] [--marker-size=<n>]
|
|
[--[no-]diff3] <current-file> <base-file> <other-file>
|
|
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
'git merge-file' incorporates all changes that lead from the `<base-file>`
|
|
to `<other-file>` into `<current-file>`. The result ordinarily goes into
|
|
`<current-file>`. 'git merge-file' is useful for combining separate changes
|
|
to an original. Suppose `<base-file>` is the original, and both
|
|
`<current-file>` and `<other-file>` are modifications of `<base-file>`,
|
|
then 'git merge-file' combines both changes.
|
|
|
|
A conflict occurs if both `<current-file>` and `<other-file>` have changes
|
|
in a common segment of lines. If a conflict is found, 'git merge-file'
|
|
normally outputs a warning and brackets the conflict with lines containing
|
|
<<<<<<< and >>>>>>> markers. A typical conflict will look like this:
|
|
|
|
<<<<<<< A
|
|
lines in file A
|
|
=======
|
|
lines in file B
|
|
>>>>>>> B
|
|
|
|
If there are conflicts, the user should edit the result and delete one of
|
|
the alternatives. When `--ours`, `--theirs`, or `--union` option is in effect,
|
|
however, these conflicts are resolved favouring lines from `<current-file>`,
|
|
lines from `<other-file>`, or lines from both respectively. The length of the
|
|
conflict markers can be given with the `--marker-size` option.
|
|
|
|
The exit value of this program is negative on error, and the number of
|
|
conflicts otherwise (truncated to 127 if there are more than that many
|
|
conflicts). If the merge was clean, the exit value is 0.
|
|
|
|
'git merge-file' is designed to be a minimal clone of RCS 'merge'; that is, it
|
|
implements all of RCS 'merge''s functionality which is needed by
|
|
linkgit:git[1].
|
|
|
|
|
|
OPTIONS
|
|
-------
|
|
|
|
-L <label>::
|
|
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,
|
|
`git merge-file -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
|
|
`<current-file>`.
|
|
|
|
-q::
|
|
Quiet; do not warn about conflicts.
|
|
|
|
--diff3::
|
|
Show conflicts in "diff3" style.
|
|
|
|
--ours::
|
|
--theirs::
|
|
--union::
|
|
Instead of leaving conflicts in the file, resolve conflicts
|
|
favouring our (or their or both) side of the lines.
|
|
|
|
|
|
EXAMPLES
|
|
--------
|
|
|
|
`git merge-file README.my README README.upstream`::
|
|
|
|
combines the changes of README.my and README.upstream since README,
|
|
tries to merge them and writes the result into README.my.
|
|
|
|
`git merge-file -L a -L b -L c tmp/a123 tmp/b234 tmp/c345`::
|
|
|
|
merges tmp/a123 and tmp/c345 with the base tmp/b234, but uses labels
|
|
`a` and `c` instead of `tmp/a123` and `tmp/c345`.
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|