ci(test): improve test execution and workflow robustness

- Add GPU detection to disable parallel tests when GPU packages (jax, torch, warp) are present
- Remove benchmark and test detection jobs to simplify workflows
- Add --suppress-no-test-exit-code to prevent failures when no tests exist
- Exclude marimo directories from ruff linting

These changes ensure proper test execution for GPU-accelerated projects and prevent workflow failures when no tests are present, making the CI pipeline more robust and adaptable to different project configurations.

Author: liblaf

template/.config/copier/mise-tasks/test.sh

@@ -5,27 +5,42 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-function is-true() {
-  case "${1,,}" in
+function is-in-ci() {
+  case "${CI,,}" in
     1 | on | true | y | yes) return 0 ;;
     0 | off | false | n | no | "") return 1 ;;
     *)
-      echo "Invalid boolean: $1." >&2
+      echo "Invalid boolean: $CI." >&2
       exit 1
       ;;
   esac
 }
 
+function needs-gpu() {
+  for pkg in jax torch warp; do
+    if python -c "import $pkg"; then
+      return 0
+    fi
+  done
+  return 1
+}
+
 # ref: <https://github.com/scientific-python/lazy-loader#early-failure>
 export EAGER_IMPORT=1
 
-if is-true "${CI-}"; then
+if needs-gpu; then
+  numprocesses='0'
+else
+  numprocesses='auto'
+fi
+
+if is-in-ci; then
   # ref: <https://docs.codecov.com/docs/test-analytics#1-output-a-junit-xml-file-in-your-ci>
   pytest \
     --junit-xml='junit.xml' --override-ini junit_family=legacy \
     --cov --cov-branch \
-    --numprocesses 'auto' \
+    --numprocesses "$numprocesses" \
     "$@"
 else
-  pytest --numprocesses 'auto' "$@"
+  pytest --numprocesses "$numprocesses" "$@"
 fi

template/.github/workflows/bench.yaml

@@ -23,29 +23,11 @@ jobs:
         with:
           cancel-others: true
 
-  detect:
-    name: Detect
-    needs:
-      - skip-duplicate
-    if: needs.skip-duplicate.outputs.should-skip != 'true'
-    runs-on: ubuntu-latest
-    outputs:
-      bench: ${{ steps.bench.outcome == 'success' }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v5
-      - id: bench
-        name: Detect Benches
-        run: |-
-          find "benches" -name "test_*.py" -type f -print -quit |
-            grep --quiet "benches"
-        continue-on-error: true
-
   bench:
     name: Bench
     needs:
-      - detect
-    if: needs.detect.outputs.bench == 'true'
+      - skip-duplicate
+    if: needs.skip-duplicate.outputs.should-skip != 'true'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

template/.github/workflows/test.yaml

@@ -25,29 +25,11 @@ jobs:
         with:
           cancel-others: true
 
-  detect:
-    name: Detect
-    needs:
-      - skip-duplicate
-    if: needs.skip-duplicate.outputs.should-skip != 'true'
-    runs-on: ubuntu-latest
-    outputs:
-      test: ${{ steps.test.outcome == 'success' }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v5
-      - id: test
-        name: Detect Tests
-        run: |-
-          find "tests" -name "test_*.py" -type f -print -quit |
-            grep --quiet "tests"
-        continue-on-error: true
-
   test:
     name: Test
     needs:
-      - detect
-    if: needs.detect.outputs.test == 'true'
+      - skip-duplicate
+    if: needs.skip-duplicate.outputs.should-skip != 'true'
     permissions:
       id-token: write
     runs-on: ubuntu-latest

template/pyproject.toml.jinja

@@ -94,10 +94,12 @@ addopts = [
   "--showlocals",
   "--strict-config",
   "--strict-markers",
+  "--suppress-no-test-exit-code",
 ]
 testpaths = ["benches", "src", "tests"]
 
 [tool.ruff]
+exclude = ["**/marimo/"]
 extend = ".config/linters/.ruff.toml"
 
 # %% if package_manager == "uv":