zsh widget that executes a git or svn log command and can be bound to a key combination

vcs_log

# Save as ~/.zsh/function/vcs_log
#
# In your ~/.zshrc
#
# fpath=(~/.zsh/function $fpath)
# autoload vcs_log
# zle -N vcs_log
# # Bind to Alt+g
# bindkey '\eg' vcs_log

function vcs_log {
  # zle -U does not work since it is only executed after the widget
  if (svn info 2> /dev/null > /dev/null); then
    BUFFER="svn log -l 7"
  else 
    BUFFER="git --no-pager log --oneline --graph --decorate --all -20"
  fi  
  zle accept-line
  true
}