add CI coverage for all 3 OSs; add CI banner in README

Author: kzhdev

.github/workflows/ci.yml

@@ -11,39 +11,58 @@ permissions:
 
 jobs:
   build-and-test:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+      fail-fast: false
+
+    runs-on: ${{ matrix.os }}
+
+    defaults:
+      run:
+        shell: bash
 
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
       - name: Set up vcpkg
         run: |
-          git clone https://github.com/microsoft/vcpkg.git ${{ github.workspace }}/vcpkg
-          ${{ github.workspace }}/vcpkg/bootstrap-vcpkg.sh -disableMetrics
-          echo "VCPKG_ROOT=${{ github.workspace }}/vcpkg" >> $GITHUB_ENV
+          git clone https://github.com/microsoft/vcpkg.git "$GITHUB_WORKSPACE/vcpkg"
+          mkdir -p "$GITHUB_WORKSPACE/vcpkg-binary-cache"
+          echo "VCPKG_ROOT=$GITHUB_WORKSPACE/vcpkg" >> $GITHUB_ENV
+          echo "VCPKG_DEFAULT_BINARY_CACHE=$GITHUB_WORKSPACE/vcpkg-binary-cache" >> $GITHUB_ENV
+
+      - name: Bootstrap vcpkg (Unix)
+        if: runner.os != 'Windows'
+        run: "$VCPKG_ROOT/bootstrap-vcpkg.sh" -disableMetrics
+
+      - name: Bootstrap vcpkg (Windows)
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: .\vcpkg\bootstrap-vcpkg.bat -disableMetrics
 
       - name: Cache vcpkg packages
         uses: actions/cache@v4
         with:
           path: |
             ${{ github.workspace }}/vcpkg/installed
-            ~/.cache/vcpkg
+            ${{ github.workspace }}/vcpkg-binary-cache
           key: vcpkg-${{ runner.os }}-${{ hashFiles('CMakeLists.txt') }}
           restore-keys: vcpkg-${{ runner.os }}-
 
       - name: Install dependencies
         run: |
-          $VCPKG_ROOT/vcpkg install nlohmann-json openssl gtest slick-net
+          "$VCPKG_ROOT/vcpkg" install nlohmann-json openssl gtest slick-net
 
       - name: Configure
         run: |
           cmake -S . -B build \
-            -DCMAKE_TOOLCHAIN_FILE=$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake \
+            -DCMAKE_TOOLCHAIN_FILE="$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake" \
             -DCMAKE_BUILD_TYPE=Release
 
       - name: Build
-        run: cmake --build build --config Release -j $(nproc)
+        run: cmake --build build --config Release --parallel
 
       - name: Unit tests
         run: ctest --test-dir build -R hyperliquid_tests --output-on-failure

README.md

@@ -2,6 +2,7 @@
 
 A C++20 SDK for the [Hyperliquid](https://hyperliquid.xyz) DEX API — REST market data, authenticated trading, and real-time WebSocket subscriptions, with native EIP-712 signing.
 
+[![CI](https://github.com/SlickQuant/hyperliquid-cpp/actions/workflows/ci.yml/badge.svg)](https://github.com/SlickQuant/hyperliquid-cpp/actions/workflows/ci.yml)
 ![C++20](https://img.shields.io/badge/C%2B%2B-20-blue)
 ![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey)
 ![License](https://img.shields.io/badge/license-MIT-green)