diff --git a/support/scripts/generate-gitlab-ci-yml b/support/scripts/generate-gitlab-ci-yml
index 5cef1146e2..51f7de21dd 100755
--- a/support/scripts/generate-gitlab-ci-yml
+++ b/support/scripts/generate-gitlab-ci-yml
@@ -2,16 +2,20 @@
 set -e
 set -o pipefail
 
-input="${1}"
+main() {
+    local template="${1}"
 
-cat "${input}"
+    cat "${template}"
 
-(
-    cd configs
-    LC_ALL=C ls -1 *_defconfig
-) \
+    (
+        cd configs
+        LC_ALL=C ls -1 *_defconfig
+    ) \
     | sed -r -e 's/^(.+)$/\1: { extends: .defconfig }\n\1_check: { extends: .defconfig_check }/'
 
-./support/testing/run-tests -l 2>&1 \
+    ./support/testing/run-tests -l 2>&1 \
     | sed -r -e '/^test_run \((.*)\).*/!d; s//\1: { extends: .runtime_test }/' \
     | LC_ALL=C sort
+}
+
+main "${@}"