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Oxygen Compare and Merge Tools. Oxygen provides a simple means of performing file and folder comparisons. The complete XML diff and merge solution offers directory, file, 3-way, and XML fragment comparisons, six different algorithms, and multiple levels of comparison. So if you configure the SemanticMerge, it will be run for all files when you decide to launch 'external diff or merge tool'. I use Git, SourceTree and Xcode on a Mac Lion machine. But I think I need an 'External Diff' tool. I will also most certainly need a Merge tool as well.
Customize External Source Control to Use MATLAB for Diff and Merge
You can customize external source control tools to use the MATLAB® Comparison Tool for diff and merge. If you want to compare MATLAB files such as live scripts, MAT, SLX, or MDL files from your source control tool, then you can configure your source control tool to open the MATLAB Comparison Tool. The MATLAB Comparison Tool provides tools for merging MathWorks® files and is compatible with popular software configuration management and version control systems. You can use the automerge tool with Git™ to automatically merge branches that contain changes in different subsystems in the same SLX file.
To set up your source control tool to use MATLAB as the application for diff and merge, you must first determine the full paths of the mlDiff
, mlMerge
, and mlAutoMerge
executable files, and then follow the recommended steps for the source control tool you are using.
Finding the Full Paths for MATLAB Diff, Merge, and AutoMerge
To get the required file paths and enable external source control tools to reuse open MATLAB sessions, run this command in MATLAB:
This command sets the MATLAB preference, under Comparison, called Allow external source control tools to use open MATLAB sessions for diffs and merges.
This command also displays the file paths to copy and paste into your source control tool setup:

On Windows®:
On Linux®:
On Mac:
where matlabroot
is replaced with the full path to your installation, for example, C:Program FilesMATLABR2020b
.
Note
Your diff and merge operations use open MATLAB sessions when available, and only open MATLAB when necessary. The operations only use the specified MATLAB installation.
Integration with Git

Command Line
To configure MATLAB diff and merge tools with command-line Git:
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Run this command in MATLAB.
This command displays the full paths of the
mlDiff
,mlMerge
, andmlAutoMerge
executable files. It also automatically populates the global.gitconfig
file. For example:Note
You need to do step 1 only once for your Git setup.
Configure your repository to use the
mlAutoMerge
executable file. Open the.gitattributes
file in your repository and add:Now, when you merge branches that contain changes in different subsystems in the same SLX file, MATLAB handles the merge automatically.
To run the MATLAB diff and merge tools from command-line Git, use git difftool
and git mergetool
:
To compare two revisions of a model using the MATLAB diff tool, type:
If you do not provide revision IDs,
git difftool
compares the working copy to the repository copy.If you do not specify which model you want to compare, command-line Git will go through all modified files and ask you if you want to compare them one by one.
To resolve a merge conflict in a model using the MATLAB merge tool, type:
If you do not specify which model you want to merge, command-line Git will go through all files and ask you if you want to merge them one by one.
SourceTree
SourceTree is an interactive GUI tool that visualizes and manages Git repositories for Windows and Mac.
Configure the MATLAB diff and merge tools as SourceTree external tools:
With SourceTree open, click Tools > Options.
On the Diff tab, under External Diff / Merge, fill the fields with the following information:
Configure your repository to automerge changes in different subsystems in the same SLX file using the
mlAutoMerge
executable file:Open the global
.gitconfig
file and add:Open the
.gitattributes
file in your repository and add:
Tip
Customize the full path of the mlDiff
, mlMerge
, and mlAutoMerge
executables to match both the MATLAB installation and the operating system you are using. For more information, see Finding the Full Paths for MATLAB Diff, Merge, and AutoMerge.
To use the MATLAB diff tool from within SourceTree, right-click a modified file under Unstaged files and select External Diff.
To use the MATLAB merge tool when SourceTree detects a merge conflict, select the Uncommitted changes branch, right-click a modified file, and select Resolve Conflicts > Launch External Merge Tool.
Integration with SVN
TortoiseSVN
With TortoiseSVN, you can customize your diff and merge tools based on the file extension. For example, to use MATLAB diff and merge tools for SLX files:
Right-click in any file explorer window and select TortoiseSVN > Settings to open TortoiseSVN settings.
In the Settings sidebar, select Diff Viewer. Click to specify the diff application based on file extensions.
Click and fill the fields with the extension and the
mlDiff
executable path:Click and repeat the same steps to add another file extension.
In the Settings sidebar, select Diff ViewerMerge Tool. Click to specify the merge application based on file extensions.
Click and fill the fields with the extension and
mlMerge
executable path:Click and repeat the same steps to add another file extension.
You can now use the MATLAB tools for diff and merge the same way you would use the TortoiseSVN default diff and merge applications.
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Note
Automerging binary files with SVN , such as SLX files, is not supported.
Integration with Other Source Control Tools
Perforce P4V
With Perforce® P4V, you can customize your diff and merge tools based on the file extension. To use MATLAB diff and merge tools for SLX files, for example:
In Perforce, click Edit > Preferences.
In the Preferences sidebar, select Diff. Under Specify diff application by extension (overrides default), click .
In the Add File Type dialog box, enter the following information:
Click .
In the Preferences sidebar, select Merge. Under Specify merge application by extension (overrides default), click .
In the Add File Type dialog box, enter the following information:
Click and repeat the steps for other file extensions.
Tip
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Customize the full path of the mlDiff
and mlMerge
executables to match both the MATLAB installation and the operating system you are using. For more information, see Finding the Full Paths for MATLAB Diff, Merge, and AutoMerge.
You can now use the MATLAB tools for diff and merge the same way you would use the Perforce default diff and merge applications.