add quick-CI

.github/workflows/ci-quick.yml

@@ -0,0 +1,66 @@
+name: Quick CI
+
+# A short version of the CI, designed to run in seconds (<200s) on every push.
+# Runs lints & basic tests on ALL branches EXCEPT main.
+
+on:
+  push:
+    branches-ignore:
+      - main
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - run: python -m pip install --upgrade pip && pip install nox
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+      - name: Check python formatting and lints (ruff)
+        run: nox -s ruff
+      - name: Check rust formatting (rustfmt)
+        run: nox -s rustfmt
+
+  semver-checks:
+    if: github.ref != 'refs/heads/main'
+    needs: [fmt]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: obi1kenobi/cargo-semver-checks-action@v2
+
+  clippy:
+    needs: [fmt]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy,rust-src
+      - uses: actions/setup-python@v5
+      - uses: Swatinem/rust-cache@v2
+        with:
+          save-if: ${{ github.event_name != 'merge_group' }}
+      - run: python -m pip install --upgrade pip && pip install nox
+      - run: nox -s clippy
+
+  tests:
+    name: test rust skip-full
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: Swatinem/rust-cache@v2
+        with:
+          save-if: ${{ github.event_name != 'merge_group' }}
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rust-src
+      - run: python -m pip install --upgrade pip && pip install nox
+      - run: nox -s test-rust -- skip-full

Contributing.md

@@ -42,6 +42,10 @@ The main nox commands we have implemented are:
 * `nox -s codspeed` will run our suite of rust and python performance tests
 * `nox -s coverage` will analyse test coverage and output `coverage.json` (alternatively: `nox -s coverage lcov` outputs `lcov.info`)
 
+### Github workflow
+
+In addition to the larger CI workflow which runs on each Pull Request, we provide a short CI workflow which runs on every push to github. This workflow runs the nox sessions: `fustfmt`, `ruff`, `clippy` and `test-rust -- skip-full` and is designed to run in under 200s to provide feedback within a reasonable timeframe and not use all your github actions minutes.
+
 ## Ways to help
 
 ### Help users identify bugs