add dieter theme v1

themes/dieter.zsh-theme

+# the idea of this theme is to contain a lot of info in a small string, by compressing some parts,
+# and colorcoding, which bring useful visual cues.  While limiting the amount of colors and such to keep
+# it easy on the eyes
+# exact return code (when >0) is on the right, so it stays out of the way
+
+# TODO: reset exit code visual cues (not exit code itself) after showing once
+# TODO: compress hostname in window title
+
+typeset -A host_repr
+host_repr=('dieter-ws-a7n8x-arch' "%{$fg_bold[green]%}ws" 'dieter-p4sci-arch' "%{$fg_bold[blue]%}p4")
+
+
+# local time, color coded after last return code
+local time="%(?.%{$fg[green]%}.%{$fg[red]%})%*%{$reset_color%}"
+# user part, color coded after privileges
+local user="%(!.%{$fg[blue]%}.%{$fg[blue]%})%n%{$reset_color%}"
+# Hostname part.  compressed and colorcoded per host_repr array
+# if not found, regular hostname in default color
+local host="@${host_repr[$(hostname)]:-$(hostname)}%{$reset_color%}"
+# Compacted $PWD
+local pwd="%{$fg[blue]%}%c%{$reset_color%}"
+
+PROMPT='${time} ${user}${host} ${pwd} $(git_prompt_info)'
+
+# i would prefer 1 icon that shows the "most drastic" deviation from head, but lets see how this works out
+ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg[yellow]%}"
+ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%} "
+ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[green]%} %{$fg[yellow]%}?%{$fg[green]%}%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_CLEAN="%{$fg[green]%}"
+
+# elaborate exitcode on the right when >0
+local return_code="%(?..%{$fg[red]%}%? ↵%{$reset_color%})"
+RPS1="${return_code}"