add CI colors, comment on speedups #792

	name: Build sample material

	env:
	CARGO_TERM_COLOR: always # We want colors in our CI output
	CARGO_INCREMENTAL: 0 # Don't waste time writing out incremental build files
	CARGO_PROFILE_TEST_DEBUG: 0 # These are thrown away anyways, don't produce them

	on:
	push:
	pull_request:

	jobs:
	deploy:
	runs-on: ubuntu-20.04
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	steps:
	- uses: actions/checkout@v4

	- name: Install tools
	uses: taiki-e/install-action@v2
	with:
	tool: [email protected],[email protected],[email protected],[email protected]

	# `minimal` profile avoids downloading `rustdocs`, `clippy`, etc.
	- name: Install targets
	run: \|
	rustup set profile minimal
	rustup target add thumbv7em-none-eabihf
	rustup component add rust-src
	rustup component add rustfmt

	- name: Find slug name
	run: \|
	slug=$(./describe.sh "${GITHUB_REF}")
	echo "Building with slug '${slug}'"
	echo "slug=${slug}" >> "${GITHUB_ENV}"

	- name: Build and test
	env: # Or as an environment variable
	HIDDEN_MESSAGE: ${{ secrets.HIDDEN_MESSAGE }}
	run: \|
	./build.sh "./rust-exercises-${{ env.slug }}"

	- name: Upload Artifacts
	uses: actions/upload-artifact@v4
	if: ${{success()}}
	with:
	name: Artifacts
	if-no-files-found: error
	path: \|
	./rust-exercises-*

	- name: Create and Upload Release
	if: github.event_name == 'push' && startswith(github.ref, 'refs/tags/')
	id: create_release
	uses: ncipollo/release-action@v1
	with:
	artifacts: "./rust-exercises-${{ env.slug }}.zip,./rust-exercises-${{ env.slug }}/nrf52-code/boards/dongle-fw/*-fw"
	allowUpdates: true
	updateOnlyUnreleased: true

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