only set prompts if default or unset

diff --git a/.zsh/zshrc/80_prompt b/.zsh/zshrc/80_prompt
index 95ea67d64dfc7378a45ec6227929a70537e47532..d42b76c114037bd47853c5acb1c295d201e26003 100644 (file)
--- a/.zsh/zshrc/80_prompt
+++ b/.zsh/zshrc/80_prompt
@@ -8,19 +8,23 @@
 # Source repository: http://git.madduck.net/v/etc/zsh.git
 #
 
-local _MIDDLE="%1v%(2v.|%B%2v%b|.)%(3v.%3v.)"
-local _PS1_HL
-if is_root; then
-  _MIDDLE="%25<..<%~%<<"
-  _PS1_HL=U
-fi
+if [ "${PS1:-}" = '%m%# ' ]; then
+  _MIDDLE="%1v%(2v.|%B%2v%b|.)%(3v.%3v.)"
+  if is_root; then
+    _MIDDLE="%25<..<%~%<<"
+    _PS1_HL=U
+  fi
+
+  _MACHINE_NAME="${_PS1_HL:=B}%m%${(L)_PS1_HL}"
+  _MACHINE_NAME="$_MACHINE_NAME${debian_chroot:+/$debian_chroot}"
 
-_MACHINE_NAME="${_PS1_HL:=B}%m%${(L)_PS1_HL}"
-_MACHINE_NAME="$_MACHINE_NAME${debian_chroot:+/$debian_chroot}"
+  PS1="%(2L.+.)%${_MACHINE_NAME}:${_MIDDLE}%# "
 
-PS1="%(2L.+.)%${_MACHINE_NAME}:${_MIDDLE}%# "
-RPS1="#%(0?..%?,)%!"
+  unset _MACHINE_NAME
+  unset _PS1_HL
+  unset _MIDDLE
+fi
 
-unset _MACHINE_NAME
+: ${RPS1:="#%(0?..%?,)%!"}
 
 # vim:ft=zsh