add: stardust-gravity-nightly (#9112) (#9134)

(cherry picked from commit bef6eb2ad3)

Signed-off-by: Owen-sz <owen@fyralabs.com>
Co-authored-by: Owen Zimmerman <123591347+Owen-sz@users.noreply.github.com>

anda/stardust/gravity/nightly/anda.hcl

@@ -0,0 +1,8 @@
+project pkg {
+    rpm {
+        spec = "stardust-gravity-nightly.spec"
+    }
+    labels {
+       nightly = 1
+    }
+ }

anda/stardust/gravity/nightly/stardust-gravity-nightly.spec

@@ -0,0 +1,43 @@
+%global commit 3283bf8b352cdcb04ef3e0edb5155c4ca8c5c97c
+%global commit_date 20251130
+%global shortcommit %(c=%{commit}; echo ${c:0:7})
+# Exclude input files from mangling
+%global __brp_mangle_shebangs_exclude_from ^/usr/src/.*$
+
+Name:           stardust-xr-gravity-nightly
+Version:        0~%{commit_date}git.%{shortcommit}
+Release:        1%?dist
+Summary:        Utility to launch apps and Stardust XR clients spatially
+URL:            https://github.com/StardustXR/gravity
+Source0:        %url/archive/%commit/gravity-%commit.tar.gz
+License:        MIT
+BuildRequires:  cargo cmake anda-srpm-macros cargo-rpm-macros mold
+
+Provides:       gravity-nightly stardust-gravity-nightly
+Conflicts:      stardust-xr-gravity
+Packager:       Owen Zimmerman <owen@fyralabs.com>
+
+%description
+%summary.
+
+%prep
+%autosetup -n gravity-%commit
+%cargo_prep_online
+
+%build
+
+%install
+%define __cargo_common_opts %{?_smp_mflags} -Z avoid-dev-deps --locked
+%cargo_install
+%cargo_license_summary_online
+%{cargo_license_online} > LICENSE.dependencies
+
+%files
+%_bindir/gravity
+%license LICENSE
+%license LICENSE.dependencies
+%doc README.md
+
+%changelog
+* Sun Jan 11 2026 Owen Zimmerman <owen@fyralabs.com>
+- Initial commit (port from stable)

anda/stardust/gravity/nightly/update.rhai

@@ -0,0 +1,5 @@
+rpm.global("commit", gh_commit("StardustXR/gravity"));
+if rpm.changed() {
+  rpm.release();
+  rpm.global("commit_date", date());
+}