Fix NuGet publish workflow: handle invalid/missing API key gracefully #41

	name: Publish NuGet Package
Check failure on line 1 in .github/workflows/nuget.yml View workflow run for this annotation GitHub Actions / .github/workflows/nuget.yml Invalid workflow file `(Line: 27, Col: 13): Unrecognized named-value: 'secrets'. Located at position 1 within expression: secrets.NUGET_API_KEY`
	on:
	push:
	tags:
	- 'v*' # Trigger on version tags like v1.0.0
	jobs:
	build:
	runs-on: windows-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Setup .NET SDK
	uses: actions/setup-dotnet@v4
	with:
	dotnet-version: '6.0.x'
	- name: Restore dependencies
	run: dotnet restore CADability/CADability.csproj
	- name: Build
	run: dotnet build CADability/CADability.csproj -c Release --no-restore
	- name: List build output
	run: dir CADability\bin\Release\netstandard2.0
	- name: Pack
	run: dotnet pack CADability/CADability.csproj -c Release --no-build -o ./nupkgs
	- name: List nupkg
	run: dir .\nupkgs
	- name: Push NuGet package
	if: ${{ secrets.NUGET_API_KEY }}
	env:
	NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
	run: \|
	$version = "${{ github.ref_name }}" -replace '^v', ''
	$pkg = Get-ChildItem -Path ./nupkgs -Filter "*$version.nupkg" \| Select-Object -First 1
	dotnet nuget push $pkg.FullName --api-key $env:NUGET_API_KEY --source https://api.nuget.org/v3/index.json --skip-duplicate

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