ci: add code coverage badge with cargo-llvm-cov

Author: EchoBT

.github/workflows/ci.yml

@@ -41,12 +41,19 @@ jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
 
       - name: Cache cargo
         uses: actions/cache@v4
@@ -59,8 +66,17 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-cargo-test-
 
-      - name: Run tests
-        run: cargo test --verbose --workspace
+      - name: Run tests with coverage
+        run: cargo llvm-cov --workspace --json --output-path coverage.json --summary-only
+
+      - name: Convert coverage to json-summary format
+        run: |
+          COVERAGE=$(cat coverage.json | jq '.data[0].totals.lines.percent')
+          echo "{\"total\":{\"lines\":{\"pct\":$COVERAGE}}}" > coverage-summary.json
+
+      - name: Update Coverage Badge
+        if: github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
+        uses: we-cli/coverage-badge-action@main
 
   clippy:
     name: Clippy

README.md

@@ -5,6 +5,7 @@
 **Distributed validator network for decentralized AI evaluation on Bittensor**
 
 [![CI](https://github.com/PlatformNetwork/platform/actions/workflows/ci.yml/badge.svg)](https://github.com/PlatformNetwork/platform/actions/workflows/ci.yml)
+[![Coverage](https://platformnetwork.github.io/platform/badges/coverage.svg)](https://github.com/PlatformNetwork/platform/actions)
 [![License](https://img.shields.io/github/license/PlatformNetwork/platform)](https://github.com/PlatformNetwork/platform/blob/main/LICENSE)
 [![GitHub stars](https://img.shields.io/github/stars/PlatformNetwork/platform)](https://github.com/PlatformNetwork/platform/stargazers)
 [![Rust](https://img.shields.io/badge/rust-1.90+-orange.svg)](https://www.rust-lang.org/)