How do I view 'git diff' output with my preferred diff tool/ viewer?

Question

When I type git diff, I want to view the output with my visual diff tool of choice (SourceGear \"diffmerge\" on Windows). How do I configure git to do this?

Answer 1

With new git difftool, its as simple as adding this to your .gitconfig file:

[diff]
    tool = any-name
[difftool "any-name"]
    cmd = "\"C:/path/to/my/ext/diff.exe\" \"$LOCAL\" \"$REMOTE\""

Optionally, also add:

[difftool]
    prompt = false

Also check out diffall, a simple script I wrote to extend the annoying (IMO) default diff behaviour of opening each in serial.

Global .gitconfig on Windows is in %USERPROFILE%\.gitconfig