Add dummy plugin, plain theme, allow plugins to override themes

plugins/dummy.sh

@@ -0,0 +1,26 @@
+function wish_dummy_start() {
+	return 0
+}
+
+function wish_dummy_end() {
+	return 0
+}
+
+function wish_dummy_set_colors() {
+	WISH_DUMMY_FG=${WISH_DUMMY_FG:-$WISH_DEFAULT_FG}
+	WISH_DUMMY_BG=${WISH_DUMMY_BG:-$WISH_DEFAULT_BG}
+}
+
+function wish_dummy_main() {
+	if [[ $fg -eq -1 ]]; then
+		local fg="\[\033[0;5;0m\]"
+	else
+		local fg="\[\033[38;5;${WISH_DUMMY_FG}m\]"
+	fi
+	if [[ $bg -eq -1 ]]; then
+		local bg="\[\033[0;5;0m\]"
+	else
+		local bg="\[\033[48;5;${WISH_DUMMY_BG}m\]"
+	fi
+	PS1="$PS1$bg${fg}dummy"
+}

themes/plain.sh

@@ -0,0 +1,2 @@
+WISH_DEFAULT_BG=-1
+WISH_DEFAULT_FG=-1

wish.sh

@@ -18,6 +18,11 @@ function wish_init() {
 	done
 
 	[[ $? -ne 0 ]] && echo "Theme $WISH_THEME not found." >&2
+
+	# Call plugins to set colors
+	for i in ${WISH_PLUGINS[@]}; do
+		eval wish_$(echo $i)_set_colors $prev
+	done
 }