fold-security-update-branches: Add check for env

To have early warnings add a check for env variables.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

release-scripts/fold-security-update-branches

@@ -23,6 +23,19 @@ CLEAN_REPREPRO=0
 CLEAN_OBS_REPREPRO=0
 RUN=
 
+check-env(){
+
+    [ -z "$GITLAB_TOKEN" ] && ( echo "No token specified, use GITLAB_TOKEN env var to specify it" >&2 ; exit 1 )
+
+    [ -z "$CI_SERVER_HOST" ] && ( echo "No server host specified, use CI_SERVER_HOST env var to specify it" >&2 ; exit 1 )
+
+    [ -z "$OSNAME" ] && ( echo "No OS name specified, use OSNAME env var to specify it" >&2 ; exit 1 )
+
+    [ -z "$RELEASE" ] && ( echo "No release specified, use RELEASE env var to specify it" >&2 ; exit 1 )
+
+    return 0
+}
+
 function get_packages ()
 {
     for comp in $COMPONENTS
@@ -185,6 +198,8 @@ usage() {
     echo "Example: RELEASE='v2021' $0 fold [components...] 2>&1 | tee -a console.log" >&2
 }
 
+check-env
+
 #If the env var NOACT = 1 set dry run mode
 if [ "${NOACT}" = "1" ]
 then