Generate assembly metadata during build

Instead of having version number in multiple places,
keep it in one place and generate AssemblyInfo.cs on the fly.

While on it, add git commit hash to product version
and bump version to 2.0.0.0.

GitHub: #25

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

Author: lstipakov

.gitignore

@@ -1,2 +1,6 @@
 obj
 /bin
+.vs
+.vscode
+AssemblyInfo.cs
+git_hash.txt

AssemblyInfo.cs

@@ -15,7 +15,7 @@
     </TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
     <IsWebBootstrapper>false</IsWebBootstrapper>
-    <ReleaseVersion>1.4.0.1</ReleaseVersion>
+    <ReleaseVersion>2.0.0.0</ReleaseVersion>
     <PublishUrl>publish\</PublishUrl>
     <Install>true</Install>
     <InstallFrom>Disk</InstallFrom>
@@ -143,4 +143,34 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+<Target Name="GenerateAssemblyInfo" BeforeTargets="BeforeBuild">
+  <!-- Run git command and store output in a temporary file -->
+  <Exec Command="git rev-parse --short HEAD > $(ProjectDir)git_hash.txt 2>nul || echo unknown > $(ProjectDir)git_hash.txt" ContinueOnError="true" />
+
+  <!-- Read the Git hash from the file and store it in a property -->
+  <ReadLinesFromFile File="$(ProjectDir)git_hash.txt">
+    <Output TaskParameter="Lines" PropertyName="GitHash"/>
+  </ReadLinesFromFile>
+
+  <!-- Default to 'unknown' if Git hash could not be read -->
+  <PropertyGroup>
+    <GitHash Condition="'$(GitHash)' == ''">unknown</GitHash>
+  </PropertyGroup>
+
+  <Message Text="Git Commit Hash: $(GitHash)" Importance="high"/>
+
+  <!-- Generate AssemblyInfo.cs dynamically -->
+  <WriteLinesToFile File="AssemblyInfo.cs"
+                    Lines="using System.Reflection%3B
+[assembly: AssemblyTitle(&quot;Openvpnserv2&quot;)]
+[assembly: AssemblyDescription(&quot;Windows service for running OpenVPN connections in the background&quot;)]
+[assembly: AssemblyProduct(&quot;Openvpnserv2&quot;)]
+[assembly: AssemblyVersion(&quot;$(ReleaseVersion)&quot;)]
+[assembly: AssemblyFileVersion(&quot;$(ReleaseVersion)&quot;)]
+[assembly: AssemblyInformationalVersion(&quot;$(ReleaseVersion)+$(GitHash)&quot;)]
+[assembly: AssemblyCompany(&quot;The OpenVPN project&quot;)]
+[assembly: AssemblyCopyright(&quot;Copyright © OpenVPN project 2025&quot;)]"
+                    Overwrite="true"
+                    Encoding="UTF-8"/>
+</Target>
+</Project>