GIT-MERGETOOL(1) Git Manual GIT-MERGETOOL(1)
git-mergetool - Run merge conflict resolution tools to resolve merge
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>
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
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
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.
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
Prompt before each invocation of the merge resolution program to
give the user a chance to skip the path.
When git-mergetool is invoked with the -g or --gui option the
default merge tool will be read from the configured merge.guitool
variable instead of merge.tool.
This overrides a previous -g or --gui setting and reads the default
merge tool will be read from the configured merge.tool variable.
Process files in the order specified in the <orderfile>, which has
one shell glob pattern per line. This overrides the diff.orderFile
configuration variable (see git-config(1)). To cancel
diff.orderFile, use -O/dev/null.
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
Part of the git(1) suite
Git 2.20.1 01/22/2019 GIT-MERGETOOL(1)