Prototype workflow for uploading nuget packages

Author: GrahamTheCoder

.github/workflows/publish-nuget.yml

@@ -0,0 +1,50 @@
+name: Publish NuGet Packages
+
+on:
+  workflow_dispatch:
+    inputs:
+      buildRunId:
+        description: "Run ID of the build workflow to download artifacts from"
+        required: true
+        type: string
+      nugetApiKey:
+        description: "NuGet API key (scoped to push packages)"
+        required: true
+        type: string
+
+jobs:
+  publish:
+    if: ${{ github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main' }}
+    runs-on: windows-2022
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 10.0.x
+
+    - name: Download NuGet package artifacts
+      uses: actions/download-artifact@v4
+      with:
+        pattern: ICSharpCode.CodeConverter*.nupkg
+        path: release-artifacts
+        merge-multiple: true
+        run-id: ${{ inputs.buildRunId }}
+
+    - name: Publish NuGet packages
+      shell: pwsh
+      env:
+        NUGET_API_KEY: ${{ inputs.nugetApiKey }}
+      run: |
+        Write-Output "::add-mask::$env:NUGET_API_KEY"
+        $source = "https://api.nuget.org/v3/index.json"
+        $packages = @(
+          "release-artifacts/ICSharpCode.CodeConverter.*.nupkg",
+          "release-artifacts/ICSharpCode.CodeConverter.CodeConv.*.nupkg"
+        )
+        foreach ($pattern in $packages) {
+          Get-ChildItem -Path $pattern -File | ForEach-Object {
+            dotnet nuget push $_.FullName -k $env:NUGET_API_KEY -s $source --skip-duplicate
+          }
+        }