chore: improve error message for 'dfx deploy'. #6792

	name: Format

	on: [pull_request]

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

	env:
	# When getting Rust dependencies, retry on network error:
	CARGO_NET_RETRY: 10
	# Use the local .curlrc
	CURL_HOME: .

	jobs:
	changes:
	runs-on: ubuntu-latest
	permissions:
	pull-requests: read
	outputs:
	sources: ${{ steps.filter.outputs.sources }}
	steps:
	- uses: actions/checkout@v4
	if: github.event_name == 'push'
	- uses: dorny/paths-filter@v3
	id: filter
	with:
	filters: \|
	sources:
	- .github/workflows/fmt.yml
	- src/**
	- Cargo.lock
	- Cargo.toml
	- rust-toolchain.toml

	test:
	name: fmt
	if: needs.changes.outputs.sources == 'true'
	needs: changes
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Cache Cargo
	uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	target
	key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}-1

	- name: Run Cargo Fmt
	run: cargo fmt --all -- --check
	env:
	RUST_BACKTRACE: 1

	aggregate:
	name: fmt:required
	if: always() && needs.changes.outputs.sources == 'true'
	needs: [changes, test]
	runs-on: ubuntu-latest
	steps:
	- name: check step result directly
	if: ${{ needs.test.result != 'success' }}
	run: exit 1

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