git使用外部diff tool

以使用meld作為git的diff tool為例：
$ sudo apt-get install meld
$ sudo gvim /bin/meld-diff.sh
$ sudo chmod +x /bin/meld-diff.sh
$ git config --global diff.external meld-diff.sh

1 #!/bin/sh
2 meld $2 $5

$ git config --global diff.external /bin/meld-diff.sh
$ git config --global merge.tool meld
參考資料：
How do I view 'git diff' output with a visual diff program?
How to: Meld for Git diffs in Ubuntu Hardy