Add a fancy prompt to zsh.

prompt.zsh-theme

# Print the green/red arrow.
PROMPT="%(?:%{$fg_bold[green]%}➜ :%{$fg_bold[red]%}➜ )"

# Add the current directory & git prompt info
#
# This checks whether the path is longer then 5 elements, and in that case prints the first element (%-1~), 
# some dots (/…/) and the last 3 elements. It is not exactly the same as paths that are not in your home
# directory, will also have the first element at the beginning, while bash just prints dots in that case:
#
# "%(5~|%-1~/…/%3~|%4~)"
#
# https://unix.stackexchange.com/questions/273529/shorten-path-in-zsh-prompt
#
PROMPT+='%{$fg[cyan]%}%(5~|%-1~/…/%3~|%4~)%{$reset_color%} $(git_prompt_info)'

# BACKUP:
#   PROMPT+=' %{$fg[cyan]%}%~%{$reset_color%} $(git_prompt_info)' # what does "%~%" do?
#   PROMPT+=' %{$fg[cyan]%}%c%{$reset_color%} $(git_prompt_info)' # keep this?  what does "%c%" do?

# Configure git prompt
ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg_bold[blue]%}git:(%{$fg[red]%}"
ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%} "
ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[blue]%}) %{$fg[yellow]%}✗"
ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg[blue]%})"