Inverting git index

.gitconfig

[alias]                                                                                                                                                                                                              
    swaplast = !git tag _invert && git reset --hard HEAD~2 && git cherry-pick _invert _invert~1 && git tag -d _invert                                                                                            
    invertindex = !git commit -m tmp1 && git add -A && git commit -m tmp2 && git swaplast && git reset HEAD~1 && git reset HEAD~1 --soft

Thanks for this - very helpful

Just have a few queries:

1. Is there any way of checking that at least one hunk is staged and one hunk is unstaged before allowing this alias to run?
2. Also, I have created a custom action in SourceTree to run this alias; is there any way of checking that the current repo is using Git (rather than Mercurial) before allowing this alias to run?