Support alternative branch download for tests

gitlab/install.sh

@@ -4,11 +4,18 @@
 # Installation script for our build tools
 
 if [ "${#}" -ne 1 ]; then
-  echo "usage: ${0} <ci-support-directory>"
+  echo "usage: ${0} <ci-support-directory> [<branch>]"
   echo "example: ${0} _ci"
+  echo "example: ${0} _ci staging"
   exit 1
 fi
 
+if [ -n "$2" ]; then
+  BRANCH=$2;
+else
+  BRANCH=master;
+fi
+
 
 # Functions for coloring echo commands
 log_info() {
@@ -34,7 +41,7 @@ run_cmd() {
 
 
 get_script() {
-  local url="https://gitlab.idiap.ch/bob/bob.admin/raw/master/gitlab/${2}"
+  local url="https://gitlab.idiap.ch/bob/bob.admin/raw/${BRANCH}/gitlab/${2}"
   local curlopt="--location --silent --show-error --output ${1}/${2}"
   if [ -e ${1}/${2} ]; then
     rm -f ${1}/${2}