From f86b963120c8b09c00508bf1a0d787fa7d1888eb Mon Sep 17 00:00:00 2001
From: Till Höppner
Date: Sun, 11 Mar 2018 15:52:48 +0100
Subject: Prettier duration printing

---
 conf.d/60-prompt.zsh | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/conf.d/60-prompt.zsh b/conf.d/60-prompt.zsh
index 1ae2531..66146a5 100644
--- a/conf.d/60-prompt.zsh
+++ b/conf.d/60-prompt.zsh
@@ -1,6 +1,9 @@
 bindkey -e # emacs-style keybindings
 
 setopt autocd
+# last line without newline terminator
+# is swallowed if this is absent
+setopt prompt_sp
 
 autoload -U zmv
 
@@ -21,6 +24,25 @@ elapsed() {
   echo $(($(timestamp) - $command_start_time))
 }
 
+humanize_duration() {
+  # ORS= disables the trailing newline
+  command awk -v ORS= '
+    function hmTime(time, stamp) {
+      split("h:m:s:ms", units, ":")
+      for (i = 2; i >= -1; i--) {
+        if (t = int( i < 0 ? time % 1000 : time / (60 ^ i * 1000) % 60 )) {
+          stamp = stamp t units[sqrt((i - 2) ^ 2) + 1] " "
+        }
+      }
+      if (stamp ~ /^ *$/) {
+        return "0ms"
+      }
+      return substr(stamp, 1, length(stamp) - 1)
+    }
+    { print hmTime($0) }
+  '
+}
+
 duration=0
 command_start_time=$(timestamp)
 # called just before line is evaluated
@@ -64,6 +86,16 @@ left_prompt() {
     echo -n "@$(hostname | tr -d '\n') "
   fi
 
+  if test -n "$IN_NIX_SHELL"; then
+    zcol "$fg[cyan]"
+    echo -n "nix "
+  fi
+
+  if test -n "$IN_BWRAP"; then
+    zcol "$fg[cyan]"
+    echo -n "bwrap "
+  fi
+
   if test -n "$DOCKER_HOST"; then
     zcol "$fg[cyan]"
     echo -n "$(basename "$DOCKER_HOST") "
@@ -91,7 +123,7 @@ right_prompt() {
   command_start_time=$(timestamp)
   if (($duration > 0.99)); then
     zcol "$fg_bold[cyan]"
-    printf "%.1fs" "$duration"
+    humanize_duration <<<"$(( $duration * 1000 ))"
   fi
 
   zcol "$reset_color"
-- 
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