Feature: add lwIP TCP/IP stack to tun listener

.github/workflows/go.yml

@@ -34,6 +34,10 @@ jobs:
           go install honnef.co/go/tools/cmd/staticcheck@latest
           staticcheck -- $(go list ./...)
 
+          # init xgo
+          docker pull techknowlogick/xgo:latest
+          go install src.techknowlogick.com/xgo@latest
+
       - name: SSH connection to Actions
         uses: P3TERX/ssh2actions@v1.0.0
         if: github.actor == github.repository_owner && contains(github.event.head_commit.message, '[ssh]')
@@ -43,15 +47,18 @@ jobs:
         env:
           NAME: clash
           BINDIR: bin
-        run: make -j releases
+        run: |
+          make cleancache && make -j releases
 
       - name: Prepare upload
+        if: startsWith(github.ref, 'refs/tags/') == false
         run: |
           echo "FILE_DATE=_$(date +"%Y%m%d%H%M")" >> $GITHUB_ENV
           echo "FILE_SHA=$(git describe --tags --always 2>/dev/null)" >> $GITHUB_ENV
 
       - name: Upload files to Artifacts
         uses: actions/upload-artifact@v2
+        if: startsWith(github.ref, 'refs/tags/') == false
         with:
           name: clash_${{ env.FILE_SHA }}${{ env.FILE_DATE }}
           path: |
@@ -76,5 +83,6 @@ jobs:
         with:
           keep_latest: 1
           delete_tags: true
+          delete_tag_pattern: premium
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}