workflow updates

.forgejo/workflows/ci.yaml

@@ -0,0 +1,44 @@
+on: [push, pull_request]
+
+name: Continuous integration
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: https://codeberg.org/icewind/attic-action
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: "${{ secrets.ATTIC_TOKEN }}"
+      - run: nix flake check --keep-going
+
+  miri-tests:
+    runs-on: ubuntu-latest
+    needs: [checks]
+    strategy:
+      fail-fast: false
+      matrix:
+        toolchain:
+          ["x86_64-unknown-linux-musl", "mips64-unknown-linux-gnuabi64"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: https://codeberg.org/icewind/attic-action
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: "${{ secrets.ATTIC_TOKEN }}"
+      - run: nix run .#miri -- test --target ${{ matrix.target }}
+
+  semver:
+    runs-on: ubuntu-latest
+    needs: checks
+    steps:
+      - uses: actions/checkout@v4
+      - uses: https://codeberg.org/icewind/attic-action
+        with:
+          name: ci
+          instance: https://cache.icewind.me
+          authToken: "${{ secrets.ATTIC_TOKEN }}"
+      - run: nix run .#semver-checks