From ee53bd3124c7c2c9e5348aa7ceeb1bf2a5d01113 Mon Sep 17 00:00:00 2001
From: "Tim St. Clair" <stclair@google.com>
Date: Mon, 19 Sep 2016 14:56:27 -0700
Subject: [PATCH] Better release failure messages

---
 build/build.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/build/build.sh b/build/build.sh
index 7c7ba7dc..7263bc74 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -34,13 +34,17 @@ if [ "$RELEASE" == "true" ]; then
   # Only allow releases of tagged versions.
   TAGGED='^v[0-9]+\.[0-9]+\.[0-9]+(-(alpha|beta)[0-9]*)?$'
   if [[ ! "$version" =~ $TAGGED ]]; then
-    echo "Only tagged versions are allowed for releases" >&2
+    echo "Error: Only tagged versions are allowed for releases" >&2
     echo "Found: $version" >&2
     exit 1
   fi
 
   # Don't include hostname with release builds
-  build_user="$(git config --get user.email)"
+  if ! build_user="$(git config --get user.email)"; then
+    echo "Error: git user not set, use:"
+    echo "git config user.email <email>"
+    exit 1
+  fi
   build_date=$( date +%Y%m%d ) # Release date is only to day-granularity
 
   # Don't use cached build objects for releases.