add build script for nuget packages

Author: bodewig

.gitignore

@@ -13,3 +13,4 @@ obj
 /.nuget/NuGet.Config
 /.nuget/NuGet.exe
 /.nuget/NuGet.targets
+*.cache

scripts/build-and-package.ps1

@@ -0,0 +1,58 @@
+# Requires -Version 7
+
+param(
+    [Parameter(Mandatory = $true)]
+    [string]
+    $Version
+)
+
+function BuildAll {
+    param(
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Version,
+
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Configuration
+    )
+
+    msbuild /p:Configuration=$Configuration XMLUnit.NET.NetFramework.sln
+    msbuild /p:Configuration=$Configuration src/main/net-constraints-nunit4/NetFramework/XMLUnit.NUnit4.Constraints.NetFramework.csproj
+
+    dotnet build XMLUnit.NET.sln -c $Configuration
+    dotnet build src/main/net-constraints-nunit4/XMLUnit.NUnit4.Constraints.csproj -c $Configuration
+}
+
+function BuildNugetPackage {
+    param(
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Version,
+
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Spec
+    )
+
+    nuget pack $Spec -Symbols -OutputDirectory build\ -Properties "version=$Version"
+}
+
+$env:DOTNET_ROLL_FORWARD = "Major"
+
+dotnet restore XMLUnit.NET.sln
+
+BuildAll -Version $Version -Configuration Debug
+
+dotnet test src/tests/net-core/XMLUnit.Core.Tests.csproj
+dotnet test src/tests/net-constraints-nunit3/XMLUnit.NUnit3.Constraints.Test.csproj
+dotnet test src/tests/net-placeholders/XMLUnit.Placeholders.Tests.csproj
+dotnet test src/tests/net-constraints-nunit4/XMLUnit.NUnit4.Constraints.Test.csproj
+
+BuildAll -Version $Version -Configuration Release
+
+BuildNugetPackage -Version $Version -Spec src\main\net-core\XMLUnit.Core.nuspec
+BuildNugetPackage -Version $Version -Spec src\main\net-constraints-nunit2\XMLUnit.NUnit2.Constraints.nuspec
+BuildNugetPackage -Version $Version -Spec src\main\net-constraints-nunit3\XMLUnit.NUnit3.Constraints.nuspec
+BuildNugetPackage -Version $Version -Spec src\main\net-constraints-nunit4\XMLUnit.NUnit4.Constraints.nuspec
+BuildNugetPackage -Version $Version -Spec src\main\net-placeholders\XMLUnit.Placeholders.nuspec