From 0ca697ad2f5e937f5cd613b1a17a90b126a1a00b Mon Sep 17 00:00:00 2001
From: Zhiming Wang <zmwangx@gmail.com>
Date: Sun, 30 Oct 2016 20:11:45 -0400
Subject: [PATCH] brew.sh: communicate when autoupdate runs for long

This will ease user anxiety when `brew install foo' is typed but nothing
seems to happen.
---
 Library/Homebrew/brew.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index f3bb605bb8..8a6ceff8fd 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -296,6 +296,13 @@ source "$HOMEBREW_LIBRARY/Homebrew/utils/analytics.sh"
 setup-analytics
 report-analytics-screenview-command
 
+# Let user know we're still updating Homebrew if brew update --preinstall
+# exceeds 3 seconds.
+update-preinstall-timer() {
+  sleep 3
+  echo 'Updating Homebrew...' >&2
+}
+
 update-preinstall() {
   [[ -z "$HOMEBREW_HELP" ]] || return
   [[ -z "$HOMEBREW_NO_AUTO_UPDATE" ]] || return
@@ -306,7 +313,19 @@ update-preinstall() {
 
   if [[ "$HOMEBREW_COMMAND" = "install" || "$HOMEBREW_COMMAND" = "upgrade" || "$HOMEBREW_COMMAND" = "tap" ]]
   then
+    if [[ -z "$HOMEBREW_VERBOSE" ]]
+    then
+      update-preinstall-timer &
+      timer_pid=$!
+    fi
+
     brew update --preinstall
+
+    if [[ -n "$timer_pid" ]]
+    then
+      kill "$timer_pid" 2>/dev/null
+      wait "$timer_pid" 2>/dev/null
+    fi
   fi
 
   # If brew update --preinstall did a migration then export the new locations.