If you want to set the editor only for Git, do either (you don’t need both):

  • Set core.editor in your Git config: git config --global core.editor "vim"
  • Set the GIT_EDITOR environment variable: export GIT_EDITOR=vim

If you want to set the editor for Git and also other programs , set the standardized VISUAL and EDITOR environment variables*:

export VISUAL=vim
export EDITOR="$VISUAL"
  • Setting both is not necessarily needed, but some programs may not use the more-correct VISUAL. See VISUAL vs. EDITOR.

For Sublime Text : Add this to the .gitconfig. The --wait is important (it allows to type text in sublime and will wait for save/close event.)

[core]
    editor = 'subl' --wait

'subl' can be replaced by the full path of the executable but is usually available when correctly installed.