feat(ci): add coverage checks

Signed-off-by: Riccardo Gallo <[email protected]>

.github/codecov.yaml

@@ -0,0 +1,28 @@
+# This file is part of Astarte.
+#
+# Copyright 2024 SECO Mind Srl
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# ref: https://docs.codecov.com/docs/codecovyml-reference
+coverage:
+  range: 60..100
+  round: down
+  precision: 1
+  status:
+    # ref: https://docs.codecov.com/docs/commit-status
+    project:
+      default:
+        # Avoid false negatives
+        threshold: 1%
+
+# Test files aren't important for coverage
+ignore:
+  - "tests"
+  - "e2e-test"
+  - "benches"
+
+# Make comments less noisy
+comment:
+  layout: "files"
+  require_changes: yes

.github/workflows/coverage.yaml

@@ -0,0 +1,40 @@
+# This file is part of Astarte.
+#
+# Copyright 2024 SECO Mind Srl
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: coverage
+defaults:
+  run:
+    shell: bash
+on:
+  workflow_run:
+    workflows: ["ci"]
+    types: [completed]
+permissions:
+  contents: read
+  actions: read
+jobs:
+  upload:
+    runs-on: ubuntu-latest
+    # Run only if originated from a PR
+    if: ${{ github.event.workflow_run.event == 'pull_request' }}
+    steps:
+      - name: Download coverage artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: coverage
+          github-token: ${{ github.token }}
+          run-id: ${{ github.event.workflow_run.id }}
+      - name: Get PR number
+        run: |
+          echo "PR_NUMBER=$(cat ./pr_number)" >> "$GITHUB_ENV"
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+          fail_ci_if_error: true
+          override_branch: ${{ github.event.workflow_run.head_branch }}
+          override_commit: ${{ github.event.workflow_run.head_sha }}
+          override_pr: ${{ env.PR_NUMBER }}

.github/workflows/test.yaml

@@ -65,3 +65,43 @@ jobs:
         run: cargo generate-lockfile
       - name: cargo test
         run: cargo test --locked --all-features --all-targets --workspace
+  coverage:
+    runs-on: ubuntu-latest
+    name: ubuntu / stable / coverage
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+      - name: Install sccache-cache
+        uses: mozilla-actions/[email protected]
+      - name: cargo install cargo-tarpaulin
+        uses: taiki-e/install-action@cargo-tarpaulin
+      - name: cargo generate-lockfile
+        if: hashFiles('Cargo.lock') == ''
+        run: cargo generate-lockfile
+      - name: Run cargo-tarpaulin with xml output
+        run: cargo tarpaulin --engine llvm --locked --all-features --ignore-tests --lib --out xml -- --test-threads 1
+      # Upload the coverage if we are not a PR from a fork, see ".github/workflows/coverage.yaml"
+      - name: Upload to codecov.io
+        if: ${{ github.event_name == 'push' }}
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+          fail_ci_if_error: true
+      # Save data to use in workflow_run
+      - name: Save PR number
+        if: ${{ github.event_name == 'pull_request' }}
+        env:
+          PR_NUMBER: ${{ github.event.number }}
+        run: |
+          echo "$PR_NUMBER" > ./pr_number
+      - name: Upload coverage artifact
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage
+          path: |
+            pr_number
+            cobertura.xml

src/lib.rs

@@ -0,0 +1,5 @@
+// This file is part of Astarte.
+//
+// Copyright 2024 SECO Mind Srl
+//
+// SPDX-License-Identifier: Apache-2.0