ci: set up swift on ubuntu without setup-swift

Author: ensan-hcl

.github/workflows/swift.yml

@@ -33,18 +33,13 @@ jobs:
         os: [ubuntu-22.04]
         swift-version: ["6.1"]
     steps:
-      - name: Setup Swift toolchain (action)
-        id: swift_setup_action
-        continue-on-error: true
-        uses: swift-actions/setup-swift@v3
-        with:
-          swift-version: ${{ matrix.swift-version }}
-      - name: Setup Swift toolchain (fallback)
-        if: ${{ steps.swift_setup_action.outcome != 'success' }}
+      - name: Setup Swift toolchain
         run: |
           curl -sL "https://download.swift.org/swift-${{ matrix.swift-version }}-release/ubuntu22.04/swift-${{ matrix.swift-version }}-RELEASE/swift-${{ matrix.swift-version }}-RELEASE-ubuntu22.04.tar.gz" -o swift-toolchain.tar.gz
           tar xf swift-toolchain.tar.gz
-          TOOLCHAIN=$PWD/swift-${{ matrix.swift-version }}-RELEASE-ubuntu22.04/usr
+          TOOLCHAIN_DIR=$(ls -d swift-${{ matrix.swift-version }}-RELEASE-*/usr | head -n 1)
+          echo "Resolved toolchain: $TOOLCHAIN_DIR"
+          TOOLCHAIN=$PWD/${TOOLCHAIN_DIR%/usr}
           echo "TOOLCHAIN=$TOOLCHAIN" >> "$GITHUB_ENV"
           echo "$TOOLCHAIN/bin" >> "$GITHUB_PATH"
       - name: Verify swift toolchain