From 271023c5e11ec5fc8be39a2161c43b2ffd034ce6 Mon Sep 17 00:00:00 2001
From: Martin Afanasjew <martin@afanasjew.de>
Date: Wed, 29 Jun 2016 14:05:40 +0200
Subject: [PATCH] analytics: handle UUID generation errors

Avoid writing an empty UUID to the Git configuration file and disable
analytics temporarily to avoid sending bogus data with an invalid UUID.
---
 Library/Homebrew/utils/analytics.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Library/Homebrew/utils/analytics.sh b/Library/Homebrew/utils/analytics.sh
index 37148dd43f..f0ec2c46e2 100644
--- a/Library/Homebrew/utils/analytics.sh
+++ b/Library/Homebrew/utils/analytics.sh
@@ -36,6 +36,13 @@ setup-analytics() {
   if [[ -z "$HOMEBREW_ANALYTICS_USER_UUID" ]]
   then
     HOMEBREW_ANALYTICS_USER_UUID="$(uuidgen)"
+
+    if [[ -z "$HOMEBREW_ANALYTICS_USER_UUID" ]]
+    then
+      # Avoid sending bogus analytics if no UUID could be generated.
+      export HOMEBREW_NO_ANALYTICS_THIS_RUN="1"
+      return
+    fi
     git config --file="$git_config_file" --replace-all homebrew.analyticsuuid "$HOMEBREW_ANALYTICS_USER_UUID"
   fi