Add coverity scan to CI and fix warnings #5

	name: coverity-linux

	on: [push, pull_request]

	permissions:
	contents: read

	jobs:
	coverity_scan:
	if: github.event_name == 'pull_request'
	runs-on: ubuntu-latest
	name: Coverity Scan
	steps:
	- uses: actions/checkout@v4

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y curl build-essential cmake pkg-config libsystemd-dev

	- name: Download Coverity Tool
	run: \|
	curl -s -L --output coverity_tool.tgz "https://scan.coverity.com/download/linux64?token=${{ secrets.COVERITY_TOKEN }}&project=gabime%2Fspdlog"
	mkdir coverity_tool
	tar -C coverity_tool --strip-components=1 -xf coverity_tool.tgz
	echo "$PWD/coverity_tool/bin" >> $GITHUB_PATH

	- name: Build with Coverity
	run: \|
	mkdir build && cd build
	cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_STANDARD=17
	cd ..
	cov-build --dir cov-int make -C build -j4

	- name: Submit results to Coverity
	run: \|
	tar czf cov-int.tgz cov-int
	curl --form token="${{ secrets.COVERITY_TOKEN }}" \
	--form [email protected] \
	--form version="GitHub PR #${{ github.event.pull_request.number }}" \
	--form description="CI run for PR" \
	https://scan.coverity.com/builds?project=gabime%2Fspdlog

Provide feedback