migrated to actions

.github/actions/libmp3lame/action.yml

@@ -0,0 +1,32 @@
+name: libmp3lame
+
+inputs:
+  env:
+    type: string
+    required: true
+  config:
+    type: string
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+  - name: Set up MSYS2
+    uses: msys2/setup-msys2@v2
+    with:
+      install: base-devel binutils autotools automake mingw-w64-x86_64-cmake nasm svn
+      path-type: inherit
+  - name: Build LAME
+    shell: cmd
+    env:
+      vsPath: C:\Program Files\Microsoft Visual Studio\2022\Enterprise\
+      cFlags: ${{ inputs.config == 'release' && '-MD' || '-MDd' }}
+    run: |
+      call "${{ env.vsPath }}VC\Auxiliary\Build\vcvars64.bat"
+      md build dist
+      D:\a\_temp\setup-msys2\msys2.cmd -c 'svn co https://svn.code.sf.net/p/lame/svn/trunk/lame@6474 lame ; cd lame ; autoreconf -i ; CC=cl.exe CXX=cl.exe CXXFLAGS=${{ env.cFlags }} ./configure --prefix=$(realpath ../build) --enable-nasm --disable-frontend --disable-shared --enable-static ; make -j ; make install ; cd ../build ; tar czf ../dist/libmp3lame.tgz *
+  - name: Publish artifact
+    uses: actions/upload-artifact@v2
+    with:
+      name: libmp3lame-${{ inputs.env }}-${{ inputs.config }}
+      path: dist/libmp3lame.tgz