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git --version
git mergetool [--tool=<tool>] [-y | --[no-]prompt] [<file>…]
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.
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
-tor--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.
--tool-help
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
Prompt before each invocation of the merge resolution program
to give the user a chance to skip the path.
-g
--gui
When git-mergetool is invoked with the -gor--gui option
the default merge tool will be read from the configured
merge.guitool variable instead of merge.tool. If
merge.guitool is not set, we will fallback to the tool
configured under merge.tool.
--no-gui
This overrides a previous -gor--gui setting and reads the
default merge tool will be read from the configured merge.tool
variable.
-O<orderfile>
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.
mergetool.hideResolved value
for a specific tool. See mergetool.hideResolved for the full
description.
mergetool.<tool>.trustExitCode
For a custom merge command, specify whether the exit code of
the merge command can be used to determine whether the merge was
successful. If this is not set to true then the merge target file
timestamp is checked and the merge assumed to have been successful
if the file has been updated, otherwise the user is prompted to
indicate the success of the merge.
mergetool.meld.hasOutput
Older versions of meld do not support the --output option.
Git will attempt to detect whether meld supports --output
by inspecting the output of meld --help. Configuring
mergetool.meld.hasOutput will make Git skip these checks and
use the configured value instead. Setting mergetool.meld.hasOutputtotrue tells Git to unconditionally use the --output option,
and false avoids using --output.
mergetool.meld.useAutoMerge
When the --auto-merge is given, meld will merge all non-conflicting
parts automatically, highlight the conflicting parts and wait for
user decision. Setting mergetool.meld.useAutoMergetotrue tells
Git to unconditionally use the --auto-merge option with meld.
Setting this value to auto makes git detect whether --auto-merge
is supported and will only use --auto-merge when available. A
value of false avoids using --auto-merge altogether, and is the
default value.
mergetool.hideResolved
During a merge Git will automatically resolve as many conflicts as
possible and write the MERGED file containing conflict markers around
any conflicts that it cannot resolve; LOCAL and REMOTE normally
represent the versions of the file from before Git’s conflict
resolution. This flag causes LOCAL and REMOTE to be overwriten so
that only the unresolved conflicts are presented to the merge tool. Can
be configured per-tool via the mergetool.<tool>.hideResolved
configuration variable. Defaults to false.
mergetool.keepBackup
After performing a merge, the original file with conflict markers
can be saved as a file with a .orig extension. If this variable
is set to false then this file is not preserved. Defaults to
true (i.e. keep the backup files).
mergetool.keepTemporaries
When invoking a custom merge tool, Git uses a set of temporary
files to pass to the tool. If the tool returns an error and this
variable is set to true, then these temporary files will be
preserved, otherwise they will be removed after the tool has
exited. Defaults to false.
mergetool.writeToTemp
Git writes temporary BASE, LOCAL, and REMOTE versions of
conflicting files in the worktree by default. Git will attempt
to use a temporary directory for these files when set true.
Defaults to false.
mergetool.prompt
Prompt before each invocation of the merge resolution program.
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.