CICD

tac: fix Windows stdin by returning None from mmap when empty #432

	name: CICD

	# spell-checker:ignore (shell/tools) nextest sccache taiki Swatinem dtolnay

	on:
	pull_request:
	push:
	branches:
	- '*'

	permissions:
	contents: read

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

	jobs:
	test_tac_windows_flaky:
	name: Test/tac-windows-${{ matrix.batch }}
	runs-on: windows-latest
	timeout-minutes: 30
	strategy:
	fail-fast: false
	matrix:
	batch: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
	env:
	SCCACHE_GHA_ENABLED: "true"
	RUSTC_WRAPPER: "sccache"
	CARGO_INCREMENTAL: 0
	steps:
	- uses: actions/checkout@v6
	with:
	persist-credentials: false
	- uses: dtolnay/rust-toolchain@stable
	- uses: taiki-e/install-action@nextest
	- uses: Swatinem/rust-cache@v2
	- name: Run sccache-cache
	uses: mozilla-actions/sccache-action@v0.0.9
	- name: Run tac tests 20 times (batch ${{ matrix.batch }}/10)
	shell: bash
	run: \|
	for i in $(seq 1 20); do
	echo "=== Batch ${{ matrix.batch }}, Run $i/20 ==="
	cargo nextest run --hide-progress-bar --features feat_os_windows -E 'test(test_tac)' \|\| exit 1
	done
	env:
	RUST_BACKTRACE: "1"

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