lib/theme: don't use date for $THEME_CLOCK_FORMAT

Author: gaelicWizard

themes/base.theme.bash

@@ -512,7 +512,17 @@ function clock_prompt() {
 	local CLOCK_STRING
 
 	if [[ "${SHOW_CLOCK}" == "true" ]]; then
-		CLOCK_STRING=$(date +"${CLOCK_FORMAT}")
+		case "${CLOCK_FORMAT}" in
+			'%H:%M:%S' | '%H:%M:%S'[$IFS])
+				CLOCK_STRING='\t'
+				;;
+			'%I:%M:%S' | '%I:%M:%S'[$IFS])
+				CLOCK_STRING='\T'
+				;;
+			*)
+				CLOCK_STRING="\D{${CLOCK_FORMAT}}"
+				;;
+		esac
 		echo -e "${CLOCK_COLOR}${CLOCK_THEME_PROMPT_PREFIX}${CLOCK_STRING}${CLOCK_THEME_PROMPT_SUFFIX}"
 	fi
 }