Update prompt to make time more accurate and faster

Signed-off-by: Aleksandar 'The Cobra' Widulski <thecobra@riseup.net>

.prompt

@@ -1,13 +1,25 @@
 #!/bin/bash
 # shebang for syntax highlighting purposes
 
+# Colors
+_NON="\[\033[0m\]"
+_BLD="\[\033[1m\]" # YEP BALD
+_BLK="\[\033[30m\]"
+_RED="\[\033[31m\]"
+_GRN="\[\033[32m\]"
+_YLW="\[\033[33m\]"
+_BLU="\[\033[34m\]"
+_PRP="\[\033[35m\]"
+_CYN="\[\033[36m\]"
+_WHT="\[\033[37m\]"
+
 __debug_trap() {
 	# Set necessary pre-command variables (PROMPT_COMMAND is a
 	# command so its excluded here)
 	if [[ "$BASH_COMMAND" != "$PROMPT_COMMAND"
 		&& "$LAST_BASH_COMMAND" == "$PROMPT_COMMAND" ]]; then
-		LAST_RT="$EPOCHREALTIME"
 		INC_TIME=1
+		LAST_RT="$EPOCHREALTIME" # This should be the last thing done in this function
 	fi
 	LAST_BASH_COMMAND="$BASH_COMMAND"
 }
@@ -28,6 +40,9 @@ __get_cmd_time() {
 	[[ $CMD_TIME -ge 3600     ]] && printf '%sh ' ${HOUR:-0}
 	[[ $CMD_TIME -ge 60       ]] && printf '%sm ' ${MINS:-0}
 	[[ $CMD_TIME -ge 1        ]] && printf '%ss ' ${SECS:-0}
+	# If you want to have a limit uncomment the next line and replace somenum with
+	# the minimum microseconds
+#	[[ $CMD_US   -ge somenum  ]] &&
 	                                printf '%sμs' ${CMD_US:-0}
 }
 
@@ -92,47 +107,36 @@ __ssh() {
 }
 
 __prompt() {
-	# Get exit code
+	# Get exit code (must be first)
 	local PLC=(${PIPESTATUS[@]})
 
-		# *_RT may not be set
-	LAST_RT="${LAST_RT:-$EPOCHREALTIME}"
-	PROMPT_RT="${PROMPT_RT:-$EPOCHREALTIME}"
-
 	# Reset time when prompt was first displayed after command
 	if [[ ${INC_TIME:-1} != 0 ]]; then 
 		PROMPT_RT="$EPOCHREALTIME"
 		INC_TIME=0
 	fi
 
+	# *_RT may not be set
+	LAST_RT="${LAST_RT:-$EPOCHREALTIME}"
+	PROMPT_RT="${PROMPT_RT:-$EPOCHREALTIME}"
+
 	# Get relative times
 
 	# Remove decimal point, simulating multiplying by 1 million
-	PROMPT_RT1M="${PROMPT_RT%.*}${PROMPT_RT#*.}"
-	LAST_RT1M="${LAST_RT%.*}${LAST_RT#*.}"
-
-	# Subtract and divide by 1 million to get a more accurate difference
-	CMD_TIME="$(((PROMPT_RT1M-LAST_RT1M)/1000000))"
-	CMD_TIME="${CMD_TIME:-0}"
+	PROMPT_RT1M="${PROMPT_RT/.}"
+	LAST_RT1M="${LAST_RT/.}"
 
 	CMD_US="$(($PROMPT_RT1M-$LAST_RT1M))"
+
+	# Subtract and divide by 1 million to get a more accurate difference
+	CMD_TIME="$((CMD_US/1000000))"
+	CMD_TIME="${CMD_TIME:-0}"
+
 	[[ ${#CMD_US} -lt 6 ]] || CMD_US="${CMD_US: -6}"
 	CMD_US="$((10#0$CMD_US))"
 
 	# Set prompt sections
 
-	# Colors
-	_NON="\[\033[0m\]"
-	_BLD="\[\033[1m\]" # YEP BALD
-	_BLK="\[\033[30m\]"
-	_RED="\[\033[31m\]"
-	_GRN="\[\033[32m\]"
-	_YLW="\[\033[33m\]"
-	_BLU="\[\033[34m\]"
-	_PRP="\[\033[35m\]"
-	_CYN="\[\033[36m\]"
-	_WHT="\[\033[37m\]"
-
 	# Text
 
 	# ssh detection and indicator