add a github workflow to report branch coverage

Signed-off-by: Ramkumar Chinchani <rchincha@cisco.com>

.github/workflows/branch-cov.yml

@@ -0,0 +1,46 @@
+name: "Branch coverage"
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [main]
+
+permissions: read-all
+
+jobs:
+  branch-cov:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [linux]
+        arch: [amd64]
+    name: coverage
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18.x
+      - name: Install dependencies
+        run: |
+          cd $GITHUB_WORKSPACE
+          sudo apt-get update
+          sudo apt-get install -y libgpgme-dev libassuan-dev libbtrfs-dev libdevmapper-dev pkg-config
+          mkdir -p test/data
+          cd test/data
+          ../scripts/gen_certs.sh
+          htpasswd -bBn test test123 > htpasswd
+          go install github.com/rillig/gobco@latest
+      - name: Check for branch coverage
+        continue-on-error: true
+        run: |
+          cd $GITHUB_WORKSPACE
+          for i in $(find . -type f \( -name "*.go" -not -name "*_test.go" -not -name "generated.go" \)); do
+            echo $i;
+            gobco -test '-tags=sync,search,scrub,metrics,ui_base,containers_image_openpgp' $i;
+            gobco -test '-tags=minimal,containers_image_openpgp' $i;
+          done
+        env:
+          OS: ${{ matrix.os }}
+          ARCH: ${{ matrix.arch }}