ci(check): Check the library function

.github/workflows/check.yml

@@ -0,0 +1,23 @@
+name: Check
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: cachix/install-nix-action@v23
+      with:
+        extra_nix_config: |
+          accept-flake-config = true
+
+    - name: Smoke-test the library function
+      run: nix develop -c just check-function

justfile

@@ -4,3 +4,6 @@ update:
     mkdir -p generated
     rm -f generated/*.nix
     install -m 644 $(nix build . --print-out-paths)/*.nix generated/
+
+check-function:
+    nix eval .\#lib.builtinLibrariesOfEmacsVersion --apply 'f: f "29.1"'