return string from the textual representations, since nullptr "short-… #735

	name: CI without Conan

	# This workflow is triggered on pushes to the repository.
	on: [push]

	jobs:
	linux:
	name: Linux
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	build_type: [Debug, Release]
	shared_libs: [SHARED_LIBS=ON, SHARED_LIBS=OFF]
	timeout-minutes: 35

	steps:
	- uses: actions/checkout@v4
	- name: Generate Dockerfile
	run: \|
	mkdir /tmp/osp-builder-docker
	cat <<EOF >/tmp/osp-builder-docker/Dockerfile
	FROM debian:bookworm
	RUN apt-get update && apt-get install -y --no-install-recommends \
	cmake \
	build-essential \
	doxygen \
	wget \
	libboost-all-dev \
	libmsgsl-dev \
	libyaml-cpp-dev \
	libxerces-c-dev \
	libzip-dev zipcmp zipmerge ziptool
	RUN wget \
	--no-check-certificate \
	"https://github.com/viproma/debian-fmilib/releases/download/debian%2F2.0.3-1/libfmilib2_2.0.3-1_amd64.deb" \
	"https://github.com/viproma/debian-fmilib/releases/download/debian%2F2.0.3-1/libfmilib2-dev_2.0.3-1_amd64.deb"
	RUN dpkg -i libfmilib2_2.0.3-1_amd64.deb libfmilib2-dev_2.0.3-1_amd64.deb
	COPY entrypoint.sh /
	ENTRYPOINT /entrypoint.sh
	EOF
	- name: Generate entrypoint.sh
	run: \|
	cat <<'EOF' >/tmp/osp-builder-docker/entrypoint.sh
	#!/bin/bash
	mkdir build
	cd build
	cmake -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DBUILD_${{ matrix.shared_libs }} /mnt/source
	cmake --build .
	ctest --output-on-failure
	EOF
	chmod 0755 /tmp/osp-builder-docker/entrypoint.sh
	- name: Build Docker image
	run: docker build -t osp-builder /tmp/osp-builder-docker/
	- name: Build cosim
	run: docker run --rm -v $(pwd):/mnt/source:ro osp-builder

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