[ci] Move CI to GHA #2

	name: CI

	on:
	push:
	branches:
	- main
	pull_request:
	types: [opened, synchronize, reopened, ready_for_review]

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	# common variable is defined in the workflow
	# repo env variable doesn't work for PR from forks
	env:
	CI_IMAGE: "paritytech/ci-unified:bullseye-1.75.0-2024-01-22-v20240222"

	jobs:
	set-image:
	# This workaround sets the container image for each job using 'set-image' job output.
	# env variables don't work for PR from forks, so we need to use outputs.
	runs-on: ubuntu-latest
	outputs:
	CI_IMAGE: ${{ steps.set_image.outputs.CI_IMAGE }}
	steps:
	- id: set_image
	run: echo "CI_IMAGE=${{ env.CI_IMAGE }}" >> $GITHUB_OUTPUT
	fmt:
	name: Cargo fmt
	runs-on: ubuntu-latest
	needs: [set-image]
	container:
	image: ${{ needs.set-image.outputs.CI_IMAGE }}
	steps:
	- name: Checkout sources
	uses: actions/checkout@v4

	- name: Rust Cache
	uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2.7.3
	with:
	cache-on-failure: true
	cache-all-crates: true

	- name: Cargo fmt
	run: cargo +nightly fmt --all -- --check
	build-test-linux:
	name: Build Linux
	runs-on: parity-large
	needs: [set-image]
	container:
	image: ${{ needs.set-image.outputs.CI_IMAGE }}
	steps:
	- name: Checkout sources
	uses: actions/checkout@v4

	- name: Rust Cache
	uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2.7.3
	with:
	cache-on-failure: true
	cache-all-crates: true

	- name: Build and Test Linux
	run: \|
	cargo build --release
	cargo test --release --all

Provide feedback