Add GitHub Actions workflow for building firmware

Author: Jason2866

.github/workflows/build.yml

@@ -0,0 +1,162 @@
+name: Build ESP-Hosted Firmware
+
+on:
+  push:
+    branches: [main]
+    tags: ['v*']
+  pull_request:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'ESP-Hosted-MCU version to build'
+        type: string
+        default: '2.7.3'
+      release:
+        description: 'Create a release'
+        type: boolean
+        default: true
+
+env:
+  ESP_IDF_VERSION: v5.5.1
+  ESP_HOSTED_VERSION: ${{ inputs.version || '2.7.3' }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: espressif/idf:v5.5.1
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - esp32
+          - esp32s2
+          - esp32s3
+          - esp32c2
+          - esp32c3
+          - esp32c5
+          - esp32c6
+          - esp32c61
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Create project from esp_hosted slave example
+        run: |
+          . $IDF_PATH/export.sh
+          idf.py create-project-from-example "espressif/esp_hosted==${{ env.ESP_HOSTED_VERSION }}:slave"
+
+      - name: Build firmware
+        working-directory: slave
+        run: |
+          . $IDF_PATH/export.sh
+          idf.py set-target ${{ matrix.target }}
+          idf.py build
+
+      - name: Prepare artifacts
+        run: |
+          mkdir -p artifacts
+          cp slave/build/network_adapter.bin artifacts/network_adapter_${{ matrix.target }}.bin
+          sha256sum artifacts/network_adapter_${{ matrix.target }}.bin > artifacts/network_adapter_${{ matrix.target }}.bin.sha256
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: firmware-${{ matrix.target }}
+          path: artifacts/
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/v') || inputs.release
+    permissions:
+      contents: write
+
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: firmware
+          merge-multiple: true
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: v${{ env.ESP_HOSTED_VERSION }}
+          files: firmware/*
+          generate_release_notes: true
+
+  manifest:
+    needs: release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    strategy:
+      matrix:
+        target:
+           - esp32
+           - esp32s2
+           - esp32s3
+           - esp32c2
+           - esp32c3
+           - esp32c5
+           - esp32c6
+           - esp32c61
+
+    steps:
+      - name: Generate manifest
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          TARGET="${{ matrix.target }}"
+          REPO="${{ github.repository }}"
+
+          # Get all release tags
+          TAGS=$(gh release list --repo "$REPO" --json tagName -q '.[].tagName')
+
+          # Build manifest using jq
+          echo '{"versions":[]}' > manifest.json
+
+          for TAG in $TAGS; do
+            # Skip manifest tag
+            if [ "$TAG" = "manifest" ]; then
+              continue
+            fi
+
+            VERSION="${TAG#v}"
+            SHA256_FILE="network_adapter_${TARGET}.bin.sha256"
+
+            # Download SHA256 file using gh CLI (handles auth properly)
+            if gh release download "$TAG" --repo "$REPO" --pattern "$SHA256_FILE" --clobber 2>/dev/null; then
+              SHA256=$(awk '{print $1}' "$SHA256_FILE")
+              rm -f "$SHA256_FILE"
+
+              if [ -n "$SHA256" ] && [ ${#SHA256} -eq 64 ]; then
+                BIN_URL="https://github.com/${REPO}/releases/download/${TAG}/network_adapter_${TARGET}.bin"
+
+                # Add to manifest using jq
+                jq --arg ver "$VERSION" --arg url "$BIN_URL" --arg sha "$SHA256" \
+                  '.versions += [{"version": $ver, "url": $url, "sha256": $sha}]' \
+                  manifest.json > tmp.json && mv tmp.json manifest.json
+              fi
+            fi
+          done
+
+          # Sort versions descending (newest first)
+          jq '.versions |= sort_by(.version | split(".") | map(tonumber)) | .versions |= reverse' \
+            manifest.json > ${TARGET}.json
+
+      - name: Upload manifest to release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          # Create manifest release if it doesn't exist
+          gh release view manifest --repo "${{ github.repository }}" >/dev/null 2>&1 || \
+            gh release create manifest --repo "${{ github.repository }}" --title "Firmware Manifests" --notes "JSON manifests listing all firmware versions for each target."
+
+          gh release upload manifest \
+            --repo "${{ github.repository }}" \
+            --clobber \
+            ${{ matrix.target }}.json
+