lib/command_duration: rename theme/command_duration.theme

Rename the `theme/command_duration.theme` file as it's not really got anything to do with theming or SCM.

lib/command_duration.bash

@@ -0,0 +1,56 @@
+# shellcheck shell=bash
+#
+# Functions for measuring and reporting how long a command takes to run.
+
+: "${COMMAND_DURATION_START_SECONDS:=${EPOCHREALTIME:-$SECONDS}}"
+: "${COMMAND_DURATION_ICON:=🕘}"
+: "${COMMAND_DURATION_MIN_SECONDS:=1}"
+
+function _command_duration_pre_exec() {
+	COMMAND_DURATION_START_SECONDS="${EPOCHREALTIME:-$SECONDS}"
+}
+
+function _dynamic_clock_icon {
+	local -i clock_hand=$(((${1:-${SECONDS}} % 12) + 90))
+	printf -v 'COMMAND_DURATION_ICON' '%b' "\xf0\x9f\x95\x$clock_hand"
+}
+
+function _command_duration() {
+	[[ -n "${BASH_IT_COMMAND_DURATION:-}" ]] || return
+
+	local command_duration=0 command_start="${COMMAND_DURATION_START_SECONDS:-0}"
+	local -i minutes=0 seconds=0 deciseconds=0
+	local -i command_start_seconds="${command_start%.*}"
+	local -i command_start_deciseconds=$((10#${command_start##*.}))
+	local current_time="${EPOCHREALTIME:-$SECONDS}"
+	local -i current_time_seconds="${current_time%.*}"
+	local -i current_time_deciseconds="$((10#${current_time##*.}))"
+
+	if [[ "${command_start_seconds:-0}" -gt 0 ]]; then
+		# seconds
+		command_duration="$((current_time_seconds - command_start_seconds))"
+
+		if ((current_time_deciseconds >= command_start_deciseconds)); then
+			deciseconds="$((current_time_deciseconds - command_start_deciseconds))"
+		else
+			((command_duration -= 1))
+			deciseconds="$((10 - (command_start_deciseconds - current_time_deciseconds)))"
+		fi
+	else
+		command_duration=0
+	fi
+
+	if ((command_duration > 0)); then
+		minutes=$((command_duration / 60))
+		seconds=$((command_duration % 60))
+	fi
+
+	_dynamic_clock_icon "${command_duration}"
+	if ((minutes > 0)); then
+		printf "%s%s%dm %ds" "${COMMAND_DURATION_ICON:-}" "${COMMAND_DURATION_COLOR:-}" "$minutes" "$seconds"
+	elif ((seconds >= COMMAND_DURATION_MIN_SECONDS)); then
+		printf "%s%s%d.%01ds" "${COMMAND_DURATION_ICON:-}" "${COMMAND_DURATION_COLOR:-}" "$seconds" "$deciseconds"
+	fi
+}
+
+safe_append_preexec '_command_duration_pre_exec'