Check minimum versions in CI (#5437)

* check minimum versions

* fix min lockfile

* fix clippy

* Delete .codex

* fix toml min version

* add cache to min-deps

---------

Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

.github/workflows/main.yml

@@ -580,6 +580,34 @@ jobs:
         run: |
           ${{ env.RUST_CARGO_COMMAND }} ${{ matrix.platform.command }} ${{ matrix.platform.args }} --target ${{ matrix.platform.target }}
 
+  # Verify that declared minimum dependency versions actually compile.
+  # Catches issues like https://github.com/DioxusLabs/dioxus/issues/5433 where
+  # the code uses APIs not available in the declared minimum version.
+  min-deps:
+    needs: check-paths
+    if: github.event.pull_request.draft == false && needs.check-paths.outputs.rust == 'true'
+    name: "Check | Minimum dependency versions"
+    runs-on: warp-ubuntu-latest-x64-4x
+    steps:
+      - uses: actions/checkout@v5
+      - uses: awalsh128/cache-apt-pkgs-action@latest
+        with:
+          packages: libwebkit2gtk-4.1-dev libgtk-3-dev libasound2-dev libudev-dev libayatana-appindicator3-dev libxdo-dev libglib2.0-dev
+          version: 1.0
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          toolchain: ${{ env.rust_nightly }}
+      - uses: dtolnay/rust-toolchain@1.88.0
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-all-crates: "true"
+          cache-workspace-crates: "true"
+          cache-provider: "warpbuild"
+      - name: Generate minimal-version lockfile
+        run: cargo +${{ env.rust_nightly }} update -Zdirect-minimal-versions
+      - name: Check workspace with minimum versions
+        run: cargo +1.88.0 check --workspace
+
   nix:
     needs: check-paths
     if: github.event.pull_request.draft == false && needs.check-paths.outputs.rust == 'true'