BUILD: Add GitHub CI & CD workflows #1

	# Provide continuous delivery (CD).
	#
	# CD deliverables currently include:
	# - Cuba shared library (built from C sources);
	#
	name: continuous-delivery

	on:
	push:
	tags:
	- 'v[0-9]+.[0-9]+.[0-9]+'
	- 'v[0-9]+.[0-9]+.[0-9]+.post[0-9]+'
	- 'v[0-9]+.[0-9]+.[0-9]+.dev[0-9]+'
	paths:
	- .github/workflows/cd.yml
	workflow_dispatch:
	inputs:
	rebuild_sharedlib:
	description: 'Rebuild shared library'
	type: boolean
	default: false
	required: false
	version_tag:
	description: 'Version tag for delivery'
	type: string
	required: false

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build_sharedlib:
	name: Build shared library

	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest]
	compiler: [gcc, llvm]
	exclude:
	- os: ubuntu-latest
	compiler: llvm

	runs-on: ${{ matrix.os }}

	timeout-minutes: 20

	if: >
	github.event_name != 'workflow_dispatch' \|\|
	github.event.inputs.rebuild_sharedlib == 'true'

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Override compiler (macOS)
	if: runner.os == 'macOS'
	run: \|
	if [ "${{ matrix.compiler }}" == 'gcc' ]; then
	export CC=$(find $(brew --prefix gcc)/bin -type f -name 'gcc*')
	fi
	if [ "${{ matrix.compiler }}" == 'llvm' ]; then
	export CC=$(brew --prefix llvm@15)/bin/clang
	fi

	- name: Build shared library
	run: ./make_sharedlib.sh

	- name: Upload shared library
	uses: actions/upload-artifact@v4
	with:
	name: libcuba-${{ github.ref_name }}
	path: dist/libcuba.*

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