prompt: improve tmux compatibility (3/3)

etc/over/env/prompt.cfg

@@ -11,3 +11,6 @@
 
 # Indicators of free space (storage, memory and swap) will turn red when there's at most this fraction of free space left.
 #OVER_PROMPT_FREESPACE_YELL=0.05
+
+# Bell when a command completes (0 to disable)
+#OVER_PROMPT_BELL=1

lib/prompt-init

@@ -3,33 +3,39 @@
 zmodload zsh/datetime
 
 OVER_PROMPT_CFG="/etc/over/env/prompt.cfg"
+OVER_PROMPT_TITLE=""
 
 if [[ -a "$OVER_PROMPT_CFG" ]]; then
 	source "$OVER_PROMPT_CFG"
 fi
 
-# emits garbage on tmux, where it's not really needed anyway
-if [[ -n "$TMUX" ]]; then
-	function __over_prompt_set_title {
-		if [[ ${TERM} =~ "screen" ]]; then
-			print -Pn "\033k\033${@}\033\134"
-		fi
-	}
-else
-	function __over_prompt_set_title { }
-fi
+function __over_prompt_set_title {
+	if [[ -n "${OVER_PROMPT_TITLE}" ]]; then
+		print -Pn "\033k${OVER_PROMPT_TITLE}\033\134"
+	else
+		print -Pn "\033k${@}\033\134"
+	fi
+}
+
+function set_title {
+	OVER_PROMPT_TITLE="$1"
+}
 
 function __over_prompt_preexec {
-	__over_prompt_set_title "${USER}: ${PWD} -> ${1}"
+	__over_prompt_set_title "${1:0:8}"
 	OVER_PROMPT_CMD_START=${EPOCHSECONDS}
 }
 
 function __over_prompt_precmd {
-	__over_prompt_set_title "${USER}: ${PWD}"
+	__over_prompt_set_title "${USER}"
 	python3 /usr/share/over-env/prompt.py "${COLUMNS}" "${PWD}" "${OVER_PROMPT_LAST_REFRESH}" "${OVER_PROMPT_SYSLOAD_WARN:=1.25}" "${OVER_PROMPT_SYSLOAD_YELL:=3.0}" "${OVER_PROMPT_FREESPACE_WARN:=0.15}" "${OVER_PROMPT_FREESPACE_YELL:=0.05}" "${OVER_PROMPT_CMD_START}"
 	PS1="$(print "%(?.%{\e[1;36m%}.%{\e[1;31m%}%?%{\e[0m%}:%{\e[1;31m%})%(\!.#.$)%{\e[0m%} ")"
 	OVER_PROMPT_LAST_REFRESH=${EPOCHSECONDS}
 	OVER_PROMPT_CMD_START=0
+	
+	if [[ "${OVER_PROMPT_BELL:=1}" == "1" ]]; then
+		print -Pn "\007"
+	fi
 }
 
 unset OVER_PROMPT_CFG