Add retries to downloading the gerrit war file(s).

testing_support/gerrit-init.sh

 #!/bin/bash
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 set -e
 
 http_port=8080
 ssh_port=29418
 
@@ skipping 35 matching lines @@
 password='test-password'
 preferred_email="test-username@test.org"
 registered_on=$(date '+%Y-%m-%d %H:%M:%S.000%:::z')
 username='test-username'
 
 # The python code below for picking the "latest" gerrit release is cribbed and
 # ported from the javascript at:
 #
 #     http://gerrit-releases.storage.googleapis.com/index.html
 url='https://www.googleapis.com/storage/v1beta2/b/gerrit-releases/o?projection=noAcl'
-curl --ssl-reqd -s $url | python <(cat <<EOF
+curl --retry 30 --ssl-reqd -s $url | python <(cat <<EOF
 # Receives Gerrit version via command line and reads json-encoded
 # text from stdin in the format:
 #
 #    {
 #     "items": [
 #      {
 #       "name": "gerrit-<version>.war",
 #       "md5Hash": "<base64 encoded md5sum>",
 #      },
 #      {
@@ skipping 48 matching lines @@
             sed 's/ //g')
   if [ -f "$target" ]; then
     file_sum=$(md5sum "$target" | awk '{print $1}' | xargs)
     if [ "$file_sum" = "$net_sum" ]; then
       ln -sf "$name" "$gerrit_exe"
       break
     else
       rm -rf "$target"
     fi
   fi
-  curl --ssl-reqd -s -o "$target" \
+  curl --retry 30 --ssl-reqd -s -o "$target" \
       "https://gerrit-releases.storage.googleapis.com/$name"
   file_sum=$(md5sum "$target" | awk '{print $1}' | xargs)
   if [ "$file_sum" != "$net_sum" ]; then
     echo "ERROR: md5sum mismatch when downloading $name" 1>&2
     rm -rf "$target"
     exit 1
   else
     ln -sf "$name" "$gerrit_exe"
   fi
 done
@@ skipping 63 matching lines @@
 To use SSH API:
   ssh ${username}@localhost -p ${ssh_port} -i ${rundir}/tmp/id_rsa gerrit
 
 To enable 'git push' without a password prompt:
   git config credential.helper 'store --file=${rundir}/tmp/.git-credentials'
 
 To stop the server:
   ${rundir}/bin/gerrit.sh stop
 
 EOF