Correctly wrap the colors

Makefile

@@ -1,6 +0,0 @@
-install:
-	mkdir -p ~/bin/dotlib
-	cp -r dotlib/* ~/bin/dotlib
-	cp -f .bash_profile ~/.bash_profile
-	cp -f .bashrc ~/.bashrc
-	cp -f .hushlogin ~/.hushlogin

dotlib/pre/prompt.sh

@@ -1,26 +1,44 @@
-prompt-init() {
-  local last_res=$? color=$PS1_color_success
-  PS1="\w "
+###
+# Setup and decorate the prompt.
+###
 
-  if [[ -d .git ]]; then
-    PS1+="$(command git branch --show-current) "
-  fi
+prompt_symbol=λ
+prompt_color_fail=(204 80 83)
+prompt_color_pass=(48 92 161)
 
-  if [[ -v SSH_CLIENT ]]; then
-    PS1+="$PS1_hostname "
-  fi
+if hash git 2>/dev/null; then
+  prompt_has_git=true
+fi
 
-  if (( last_res )); then
-    color=$PS1_color_fail
-  fi
+prompt_color_reset=$(tput sgr0)
 
-  PS1+="\[$color\][$last_res]\[$PS1_color_reset\] $PS1_prompt_sym "
+symbol-decorate() {
+  local -n prompt_colors=$1
+  local r=${prompt_colors[0]} g=${prompt_colors[1]} b=${prompt_colors[2]}
+  printf '\[\e[38;2;%d;%d;%dm\]%s\[%s\]' "$r" "$g" "$b" "$prompt_symbol" "$(tput sgr0)"
 }
 
-PROMPT_COMMAND+=(prompt-init)
+prompt-decorate() {
+  local res=$? prompt_str
 
-PS1_prompt_sym=λ
-PS1_hostname=${HOSTNAME-"$(hostname)"}
-PS1_color_fail=$(tput setaf 1)
-PS1_color_success=$(tput setaf 2)
-PS1_color_reset=$(tput sgr0)
+  # prepend the 
+  if [[ -v SSH_CLIENT && -v HOSTNAME ]]; then
+    prompt_str+=$HOSTNAME:
+  fi
+
+  prompt_str+="\w "
+
+  if [[ -v prompt_has_git && -d .git ]]; then
+    prompt_str+="$(command git branch --show-current) "
+  fi
+
+  if (( res )); then
+    prompt_str+=$(symbol-decorate prompt_color_fail)
+  else
+    prompt_str+=$(symbol-decorate  prompt_color_pass)
+  fi
+
+  PS1="$prompt_str "
+}
+
+PROMPT_COMMAND+=(prompt-decorate)