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git/Documentation/git-mergetool.txt
Junio C Hamano 109859e274 mergetool: support --tool-help option like difftool does
This way we do not have to risk the list of tools going out of sync
between the implementation and the documentation.

In the same spirit as bf73fc2 (difftool: print list of valid tools
with '--tool-help', 2012-03-29), trim the list of merge backends in
the documentation.  We do not want to have a complete list of valid
tools; we only want a list to help people guess what kind of things
the tools do to be specified there, and refer them to --tool-help
for a complete list.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-07-23 14:42:39 -07:00

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git-mergetool(1)
================
NAME
----
git-mergetool - Run merge conflict resolution tools to resolve merge conflicts
SYNOPSIS
--------
[verse]
'git mergetool' [--tool=<tool>] [-y|--no-prompt|--prompt] [<file>...]
DESCRIPTION
-----------
Use `git mergetool` to run one of several merge utilities to resolve
merge conflicts. It is typically run after 'git merge'.
If one or more <file> parameters are given, the merge tool program will
be run to resolve differences on each file (skipping those without
conflicts). Specifying a directory will include all unresolved files in
that path. If no <file> names are specified, 'git mergetool' will run
the merge tool program on every file with merge conflicts.
OPTIONS
-------
-t <tool>::
--tool=<tool>::
Use the merge resolution program specified by <tool>.
Valid values include emerge, gvimdiff, kdiff3,
meld, vimdiff, and tortoisemerge. Run `git mergetool --tool-help`
for the list of valid <tool> settings.
+
If a merge resolution program is not specified, 'git mergetool'
will use the configuration variable `merge.tool`. If the
configuration variable `merge.tool` is not set, 'git mergetool'
will pick a suitable default.
+
You can explicitly provide a full path to the tool by setting the
configuration variable `mergetool.<tool>.path`. For example, you
can configure the absolute path to kdiff3 by setting
`mergetool.kdiff3.path`. Otherwise, 'git mergetool' assumes the
tool is available in PATH.
+
Instead of running one of the known merge tool programs,
'git mergetool' can be customized to run an alternative program
by specifying the command line to invoke in a configuration
variable `mergetool.<tool>.cmd`.
+
When 'git mergetool' is invoked with this tool (either through the
`-t` or `--tool` option or the `merge.tool` configuration
variable) the configured command line will be invoked with `$BASE`
set to the name of a temporary file containing the common base for
the merge, if available; `$LOCAL` set to the name of a temporary
file containing the contents of the file on the current branch;
`$REMOTE` set to the name of a temporary file containing the
contents of the file to be merged, and `$MERGED` set to the name
of the file to which the merge tool should write the result of the
merge resolution.
+
If the custom merge tool correctly indicates the success of a
merge resolution with its exit code, then the configuration
variable `mergetool.<tool>.trustExitCode` can be set to `true`.
Otherwise, 'git mergetool' will prompt the user to indicate the
success of the resolution after the custom tool has exited.
-y::
--no-prompt::
Don't prompt before each invocation of the merge resolution
program.
--prompt::
Prompt before each invocation of the merge resolution program.
This is the default behaviour; the option is provided to
override any configuration settings.
TEMPORARY FILES
---------------
`git mergetool` creates `*.orig` backup files while resolving merges.
These are safe to remove once a file has been merged and its
`git mergetool` session has completed.
Setting the `mergetool.keepBackup` configuration variable to `false`
causes `git mergetool` to automatically remove the backup as files
are successfully merged.
GIT
---
Part of the linkgit:git[1] suite