ci: publish musl (Alpine) Linux release binaries

.github/workflows/build-koko.yml

@@ -7,10 +7,18 @@ on:
         required: false
         default: 'false'
         type: boolean
+      release_tag:
+        description: "Release tag (pin to match lemonade's kokoro version, e.g. b17)"
+        required: false
+        default: 'b17'
+        type: string
 
 permissions:
   contents: write
 
+env:
+  RELEASE_TAG: ${{ github.event.inputs.release_tag || format('b{0}', github.run_number) }}
+
 jobs:
   build:
     name: Build ${{ matrix.os }}-${{ matrix.target }}
@@ -97,15 +105,15 @@ jobs:
             repo: context.repo.repo
           });
 
-          let releaseId = releases.data.find(r => r.tag_name === `b${{ github.run_number }}`)?.id;
+          let releaseId = releases.data.find(r => r.tag_name === `${{ env.RELEASE_TAG }}`)?.id;
 
           if (!releaseId) {
             // If no release exists, create one (only for Linux)
             const release = await github.rest.repos.createRelease({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              tag_name: `b${{ github.run_number }}`,
-              name: `b${{ github.run_number }}`,
+              tag_name: `${{ env.RELEASE_TAG }}`,
+              name: `${{ env.RELEASE_TAG }}`,
               draft: false,
               prerelease: false
             });
@@ -122,5 +130,94 @@ jobs:
             release_id: releaseId,
             data: assetData
           });
-
+
+          console.log('Uploaded asset:', response.data.browser_download_url);
+
+  # musl (Alpine). Built inside an Alpine container so cargo targets musl
+  # natively (no cross toolchain). arm64 runs on native ARM runners.
+  build-musl:
+    name: Build linux-musl-${{ matrix.arch }}
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - runner: ubuntu-latest
+            arch: x86_64
+          - runner: ubuntu-24.04-arm
+            arch: arm64
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Build (Alpine / musl)
+      run: |
+        docker run --rm -v "$PWD:/src" -w /src alpine:latest sh -euxc '
+          apk add --no-cache build-base cmake git cargo rust opus-dev openssl-dev pkgconf clang clang-dev llvm-dev onnxruntime onnxruntime-dev
+          export LIBCLANG_PATH=/usr/lib
+          # No prebuilt ONNX Runtime exists for musl, so dynamically link the
+          # system libonnxruntime (from the onnxruntime apk) instead of letting
+          # the ort crate download a glibc binary.
+          export ORT_LIB_LOCATION=/usr/lib
+          export ORT_PREFER_DYNAMIC_LINK=1
+          cargo build --release
+          chmod -R a+rwX target
+        '
+
+    - name: Prepare archive
+      run: |
+        mkdir -p archive/linux-musl-${{ matrix.arch }}
+        cp target/release/koko archive/linux-musl-${{ matrix.arch }}/
+        cp -pr espeak-ng-data archive/linux-musl-${{ matrix.arch }}/espeak-ng-data
+
+    - name: Compress archive
+      run: |
+        cd archive
+        tar -czf kokoros-linux-musl-${{ matrix.arch }}.tar.gz linux-musl-${{ matrix.arch }}
+
+    - name: Upload archive
+      uses: actions/upload-artifact@v4
+      with:
+        name: kokoros-build-linux-musl-${{ matrix.arch }}
+        path: archive/linux-musl-${{ matrix.arch }}/
+        retention-days: 7
+
+    - name: Upload release asset
+      if: github.event.inputs.create_release == 'true'
+      uses: actions/github-script@v7
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        script: |
+          const fs = require('fs').promises;
+          const releases = await github.rest.repos.listReleases({
+            owner: context.repo.owner,
+            repo: context.repo.repo
+          });
+
+          let releaseId = releases.data.find(r => r.tag_name === `${{ env.RELEASE_TAG }}`)?.id;
+
+          if (!releaseId) {
+            const release = await github.rest.repos.createRelease({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag_name: `${{ env.RELEASE_TAG }}`,
+              name: `${{ env.RELEASE_TAG }}`,
+              draft: false,
+              prerelease: false
+            });
+            releaseId = release.data.id;
+          }
+
+          const assetData = await fs.readFile('./archive/kokoros-linux-musl-${{ matrix.arch }}.tar.gz');
+          const assetName = 'kokoros-linux-musl-${{ matrix.arch }}.tar.gz';
+
+          const response = await github.rest.repos.uploadReleaseAsset({
+            name: assetName,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            release_id: releaseId,
+            data: assetData
+          });
+
           console.log('Uploaded asset:', response.data.browser_download_url);