ci: add coverage action

.github/workflows/main.yml

@@ -88,6 +88,16 @@ jobs:
         git fetch -f origin ${{ github.ref }}:${{ github.ref }} ;
         echo git describe now reports $(git describe --always)
 
+    - name: coverage setup
+      env: ${{matrix.env}}
+      if: matrix.coverage
+      run: |
+        # Use python3 coverage to match version in flux docker image
+        sudo apt update ; \
+        sudo apt install -yy python3-pip ; \
+        pip3 install --upgrade pip ;
+        pip3 install --upgrade --force-reinstall coverage ;
+
     - name: docker buildx
       uses: docker/setup-buildx-action@v3
       if: matrix.needs_buildx
@@ -101,6 +111,15 @@ jobs:
       if: failure() || cancelled()
       run: src/test/checks-annotate.sh
 
+    - name: coverage report
+      if: success() && matrix.coverage
+      env:
+        DOCKER_REPO:
+      uses: codecov/codecov-action@v4
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        flags: ${{matrix.coverage_flags}}
+
     - name: create release
       id: create_release
       if: |

codecov.yml

@@ -0,0 +1,21 @@
+coverage:
+ round: down
+ range: "65...100"
+ ignore:
+ - "^t/.*"
+ - ".*/test/.*"
+
+ # Allow coverage to drop up to 0.1%
+ status:
+  project:
+   default:
+    threshold: .1
+
+comment:
+ layout: "header, diff, changes, tree"
+ behavior: new
+ after_n_builds: 2
+
+codecov:
+ notify:
+  after_n_builds: 2

src/test/docker/docker-run-checks.sh

@@ -159,6 +159,7 @@ export DISTCHECK
 export RECHECK
 export BUILD_DIR
 export chain_lint
+export COVERAGE
 
 if [[ "$INSTALL_ONLY" == "t" ]]; then
     docker run --rm \

src/test/generate-matrix.py

@@ -208,6 +208,13 @@ def __str__(self):
         DISTCHECK="t",
     ),
 )
+# coverage
+matrix.add_build(
+    name="coverage",
+    image="el9",
+    coverage_flags="ci-basic",
+    coverage=True,
+)
 
 
 print(matrix)