How to fix error: cannot run diff driver 'driver-name': No such file or directory in Git

First, look at the error message to identify which driver is missing:

error: cannot run diff driver 'jupyternotebook': No such file or directory

The driver name is shown in quotes (in this case, 'jupyternotebook').

View the .gitattributes file to see which files use this driver:

cat .gitattributes

You might see something like:

*.ipynb diff=jupyternotebook
*.csv diff=csv_diff

Add the driver configuration to your Git config. You can do this globally (for all repos) or locally (for just this repo):

For a global configuration:

git config --global diff.jupyternotebook.command 'git-nbdiffdriver diff'

For a local configuration:

git config diff.jupyternotebook.command 'git-nbdiffdriver diff'

Replace 'jupyternotebook' with your driver name and the command with the appropriate executable.

If the driver command requires a specific tool, make sure it's installed and in your PATH:

For nbdime (Jupyter notebooks):

pip install nbdime

For other custom diff drivers:

Check the repository documentation or team wiki for installation instructions. Common diff drivers include:
- git-nbdiffdriver (Jupyter notebooks)
- git-diff-drivers collection (various file types)
- Custom scripts specific to your project

Check that your Git config includes the driver:

git config --list | grep diff

You should see something like:

diff.jupyternotebook.command=git-nbdiffdriver diff

Then test the diff command:

git diff

If you need to view diffs immediately and can't set up the driver, you can temporarily disable it:

git --no-pager diff --no-ext-diff

The --no-ext-diff flag tells Git to use its default diff behavior and ignore custom drivers.

Or rename .gitattributes temporarily:

mv .gitattributes .gitattributes.bak
git diff
mv .gitattributes.bak .gitattributes