show git status on tab key

.sh

# When Tab is pressed on an empty(!) command line, the contents of the
# directory are printed (`ls`) instead of a menu list of all
# executables:

function my-hg-report() {
    tip=$(hg tip 2> /dev/null) || return
    echo
    hg --config pager.pager= status
    echo
    hg --config pager.pager= log --limit 5 --style compact
}

function my-git-report() {
    ref=$(git symbolic-ref HEAD 2> /dev/null) || return
    echo "------------------------------------------------------------"
    git status
    echo "------------------------------------------------------------"
    git log --pretty=tformat:"%ae    %ci%C(bold)%d%Creset%n%h: %s%n" -3 --color |cat
    echo
}

function complete-or-list() {
    if [[ $#BUFFER == 0 ]]; then
        echo
        ls -F
        my-git-report || my-hg-report
        zle reset-prompt
    else
        zle expand-or-complete
    fi
}
zle -N complete-or-list
bindkey '^I' complete-or-list