mono: switch to MSBuild

Mono version coming with Ubuntu 22.04 is an outdated
and have bugs like inability to handle escaped
semicolons (https://github.com/mono/mono/pull/1580/files).

Bump to Mono 6.12 and switch to MSBuild (since xbuild is outdated).

Signed-off-by: Lev Stipakov <[email protected]>

Author: lstipakov

.github/workflows/build.yml

@@ -6,13 +6,30 @@ on:
 
 jobs:
   ubuntu:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v3
-    - name: Install dependencies
-      run: sudo apt-get update && sudo apt-get install mono-devel
-    - name: Build
-      run: ./build.sh
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Install Latest Mono & MSBuild
+        run: |
+          sudo apt update
+          sudo apt install -y gnupg ca-certificates
+
+          sudo gpg --homedir /tmp --no-default-keyring \
+            --keyring /usr/share/keyrings/mono-official-archive-keyring.gpg \
+            --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+
+          echo \
+            "deb [signed-by=/usr/share/keyrings/mono-official-archive-keyring.gpg] https://download.mono-project.com/repo/ubuntu stable-focal main" | \
+            sudo tee /etc/apt/sources.list.d/mono-official-stable.list
+
+          # Update and install Mono & MSBuild
+          sudo apt update
+          sudo apt install -y mono-devel msbuild
+
+      - name: Build
+        run: ./build.sh
 
   win:
     runs-on: windows-latest

build.sh

@@ -2,10 +2,8 @@
 
 set -eux
 
-xbuild /p:Configuration=Release "/p:Platform=Any CPU" OpenVpnService.sln
-xbuild /p:Configuration=Release "/p:Platform=x86" OpenVpnService.sln
-xbuild /p:Configuration=Release "/p:Platform=x64" OpenVpnService.sln
-
-xbuild /p:Configuration=Debug "/p:Platform=Any CPU" OpenVpnService.sln
-xbuild /p:Configuration=Debug "/p:Platform=x86" OpenVpnService.sln
-xbuild /p:Configuration=Debug "/p:Platform=x64" OpenVpnService.sln
+for config in Release Debug; do
+  for platform in "Any CPU" x86 x64; do
+    msbuild /p:Configuration=$config /p:Platform="$platform" OpenVpnService.sln
+  done
+done