Git diff/merge Configuration

1. Install the meld graphical Tool
Git difftool and git mergetool are git commands dedicated to providing diff and merge with our own tools.
You only need to configure it:

Git config -- Global diff. Tool meld # configure the default difftool
Git config -- Global merge. Tool meld # configure the default mergetool

If you want to use meld to compare directories
Download this open-source Git-diffall Tool

Then configure:
Git config -- Global diff. Tool meld
Git config -- Global alias. diffall Git-diffall # Put Git-diffall in a convenient path that can be found in the environment.