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git-mergetool - Run merge conflict resolution tools to resolve merge conflicts


git mergetool [--tool=<tool>] [-y | --[no-]prompt] [<file>...]


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.


-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.

Print a list of merge tools that may be used with --tool.

-y, --no-prompt
Don’t prompt before each invocation of the merge resolution program. This is the
default if the merge resolution program is explicitly specified with the --tool option
or with the merge.tool configuration variable.

Prompt before each invocation of the merge resolution program to give the user a
chance to skip the path.


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.


Part of the git(1) suite

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