ci: Add clippy

.gitlab-ci.yml

@@ -38,6 +38,18 @@ rustfmt:
     - cargo fmt --version
     - cargo fmt --all -- --color=always --check
 
+cargo-clippy:
+  image: 'registry.gitlab.gnome.org/gnome/gnome-runtime-images/rust_bundle:master'
+  stage: test
+  tags:
+    - flatpak
+  variables:
+    MANIFEST_PATH: "build-aux/org.gnome.FractalNext.Devel.json"
+    FLATPAK_MODULE: "fractal"
+  script:
+    - flatpak-builder --keep-build-dirs --user --disable-rofiles-fuse --stop-at=${FLATPAK_MODULE} flatpak_app --repo=repo ${BRANCH:+--default-branch=$BRANCH} ${MANIFEST_PATH}
+    - echo "cargo clippy -- -D warnings" | flatpak-builder --disable-rofiles-fuse --build-shell=${FLATPAK_MODULE} flatpak_app ${MANIFEST_PATH}
+
 pages:
   image: "ghcr.io/gtk-rs/gtk4-rs/gtk4:latest"
   variables: