Split build and pack in CI on push

Author: piksel

.github/workflows/on-push.yml

@@ -75,8 +75,15 @@ jobs:
         dotnet-version: '3.1.x'
         source-url: https://nuget.pkg.github.com/icsharpcode/index.json
 
-    - name: Build and pack
-      run: dotnet build -c Release -o dist /p:ContinuousIntegrationBuild=true /p:EmbedUntrackedSources=true /p:Version=$(git describe --abbrev | % { $_.substring(1) }) src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj
+    - name: Build library for .NET Standard 2.0
+      run: dotnet build -c Release -f netstandard2.0 /p:ContinuousIntegrationBuild=true src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj
+    - name: Build library for .NET Standard 2.1
+      run: dotnet build -c Release -f netstandard2.1 /p:ContinuousIntegrationBuild=true src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj
+    - name: Build library for .NET Framework 4.5
+      run: dotnet build -c Release -f net45 /p:ContinuousIntegrationBuild=true src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj
+
+    - name: Create nuget package
+      run: dotnet pack src/ICSharpCode.SharpZipLib/ICSharpCode.SharpZipLib.csproj --configuration Release --output dist /p:ContinuousIntegrationBuild=true /p:EmbedUntrackedSources=true /p:Version=$(git describe --abbrev | % { $_.substring(1) })
 
     - name: Upload nuget package artifact
       uses: actions/upload-artifact@v2