[fix] only write out the plugin build metadata if at least one plugin… #564

	name: build_sample_plugins
	on: [push]
	jobs:
	build:
	strategy:
	matrix:
	runs-on: [ubuntu-latest, windows-latest]
	runs-on: ${{ matrix.runs-on }}
	steps:
	- name: "Checkout repository"
	uses: actions/checkout@v4
	with:
	submodules: true
	- name : "Build plugins"
	run: \|
	cd iolite_c_api/sample_plugins
	cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
	cmake --build build --config Release
	- name : "Archive plugins"
	uses: actions/upload-artifact@v4
	with:
	name: sample_plugins-${{ matrix.runs-on }}
	path: \|
	iolite_c_api/sample_plugins/linux/*.so
	iolite_c_api/sample_plugins/windows/*.dll
	merge:
	needs: build
	runs-on: ubuntu-latest
	steps:
	- name: "Download artifacts"
	uses: actions/download-artifact@v4
	with:
	path: sample_plugins
	pattern: sample_plugins-*
	merge-multiple: true
	- name : "Archive plugins"
	uses: actions/upload-artifact@v4
	with:
	name: sample_plugins
	path: \|
	sample_plugins/*/

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