ci: expand $CI to nothing
PR put `set -o nounset` in `ci/lib.sh`. It turns out that this
won't work when `$CI` is unset (it is always set in CI). Expand `$CI` to
nothing.
Fixes:
@@ -17,7 +17,7 @@ export branch="${target_branch:-main}"
clone_tests_repo()
{
if [ -d "$tests_repo_dir" ]; then
- [ -n "$CI" ] && return
+ [ -n "${CI:-}" ] && return
pushd "${tests_repo_dir}"
git checkout "${branch}"
git pull
