Simplify the use of ZDOTDIR

runcoms/zlogin

@@ -8,7 +8,7 @@
 # Execute code that does not affect the current session in the background.
 {
   # Compile the completion dump to increase startup speed.
-  zcompdump="${ZDOTDIR:-$HOME}/.zcompdump"
+  zcompdump="$ZDOTDIR/.zcompdump"
   if [[ -s "$zcompdump" && (! -s "${zcompdump}.zwc" || "$zcompdump" -nt "${zcompdump}.zwc") ]]; then
     zcompile "$zcompdump"
   fi

runcoms/zshenv

@@ -74,3 +74,10 @@ if [[ ! -d "$TMPPREFIX" ]]; then
   mkdir -p "$TMPPREFIX"
 fi
 
+#
+# Zsh
+#
+
+ZDOTDIR="${ZDOTDIR:-$HOME}"
+PREZTO="$ZDOTDIR/.zprezto"
+

runcoms/zshrc

@@ -6,8 +6,8 @@
 #
 
 # Source Prezto.
-if [[ -s "${ZDOTDIR:-$HOME}/.zprezto/init.zsh" ]]; then
-  source "${ZDOTDIR:-$HOME}/.zprezto/init.zsh"
+if [[ -s "$PREZTO/init.zsh" ]]; then
+  source "$PREZTO/init.zsh"
 fi
 
 # Customize to your needs...