ci: fix cross testing #2829

Workflow file for this run

	name: ci
	on:
	pull_request:
	push:
	branches:
	- master
	schedule:
	- cron: '00 01 * * *'

	# The section is needed to drop write-all permissions that are granted on
	# `schedule` event. By specifying any permission explicitly all others are set
	# to none. By using the principle of least privilege the damage a compromised
	# workflow can do (because of an injection or compromised third party tool or
	# action) is restricted. Currently, the workflow doesn't need any additional
	# permission except for pulling the code. Adding labels to issues, commenting
	# on pull-requests, etc. may need additional permissions:
	#
	# Syntax for this section:
	# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
	#
	# Reference for how to assign permissions on a job-by-job basis:
	# https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs
	#
	# Reference for available permissions that we can enable if needed:
	# https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token
	permissions:
	# to fetch code (actions/checkout)
	contents: read

	jobs:
	# This job does our basic build+test for supported platforms.
	test:
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	include:
	- build: stable
	os: ubuntu-latest
	rust: stable
	- build: beta
	os: ubuntu-latest
	rust: beta
	- build: nightly
	os: ubuntu-latest
	rust: nightly
	- build: macos
	os: macos-latest
	rust: stable
	- build: win-msvc
	os: windows-latest
	rust: stable
	- build: win-gnu
	os: windows-latest
	rust: stable-x86_64-gnu
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	- name: Show CPU info for debugging
	if: matrix.os == 'ubuntu-latest'
	run: lscpu
	- name: Basic build
	run: cargo build --verbose
	- name: Build docs
	run: cargo doc --verbose
	- name: Run subset of tests
	run: cargo test --verbose --test integration
	- name: Build regex-syntax docs
	run: cargo doc --verbose -p regex-syntax
	- name: Run subset of regex-syntax tests
	run: cargo test --verbose -p regex-syntax
	- name: Build regex-automata docs
	run: cargo doc --verbose -p regex-automata
	- name: Run subset of regex-automata tests
	if: matrix.build != 'win-gnu' # Just horrifically slow.
	run: cargo test --verbose -p regex-automata
	- name: Run regex-lite tests
	run: cargo test --verbose -p regex-lite
	- name: Run regex-cli tests
	run: cargo test --verbose -p regex-cli

	# This job runs tests on cross compiled targets.
	#
	# We used to just have one test and do the same thing on normal targets and
	# cross targets, but cross tests can take an obscenely long time. Especially
	# the doc tests, where each one is compiled individually. (We haven't moved
	# to Rust 2024 yet.)
	cross:
	env:
	# Bump this as appropriate. We pin to a version to make sure CI
	# continues to work as cross releases in the past have broken things
	# in subtle ways.
	CROSS_VERSION: v0.2.5
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	target:
	- i686-unknown-linux-gnu
	- aarch64-unknown-linux-gnu
	- powerpc-unknown-linux-gnu
	- powerpc64-unknown-linux-gnu
	- s390x-unknown-linux-gnu
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install and configure Cross
	run: \|
	# In the past, new releases of 'cross' have broken CI. So for now, we
	# pin it. We also use their pre-compiled binary releases because cross
	# has over 100 dependencies and takes a bit to compile.
	dir="$RUNNER_TEMP/cross-download"
	mkdir "$dir"
	echo "$dir" >> $GITHUB_PATH
	cd "$dir"
	curl -LO "https://github.com/cross-rs/cross/releases/download/$CROSS_VERSION/cross-x86_64-unknown-linux-musl.tar.gz"
	tar xf cross-x86_64-unknown-linux-musl.tar.gz
	- name: Basic build
	run: cross build --all --verbose --target ${{ matrix.target }}
	- name: Run subset of tests
	run: cross test --verbose --test integration --target ${{ matrix.target }}
	- name: Run subset of regex-syntax tests
	run: cross test --verbose -p regex-syntax --lib --target ${{ matrix.target }}
	- name: Run subset of regex-automata tests
	run: cross test --verbose -p regex-automata --lib --target ${{ matrix.target }}
	- name: Run regex-lite tests
	run: cross test --verbose -p regex-lite --lib --target ${{ matrix.target }}
	- name: Run regex-cli tests
	run: cross test --verbose -p regex-cli --lib --target ${{ matrix.target }}

	# This job runs a stripped down version of CI to test the MSRV. The specific
	# reason for doing this is that the regex crate's dev-dependencies tend to
	# evolve more quickly. There isn't as tight of a control on them because,
	# well, they're only used in tests and their MSRV doesn't matter as much.
	#
	# It is a bit unfortunate that our MSRV test is basically just "build it"
	# and pass if that works. But usually MSRV is broken by compilation problems
	# and not runtime behavior. So this is in practice good enough.
	msrv:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: 1.65.0
	- name: Basic build
	run: cargo build --verbose
	- name: Build docs
	run: cargo doc --verbose

	# This job runs many more tests for the regex crate proper. Basically,
	# it repeats the same test suite for a bunch of different crate feature
	# combinations. There are so many features that exhaustive testing isn't
	# really possible, but we cover as much as is feasible.
	#
	# If there is a feature combo that should be tested but isn't, you'll want to
	# add it to the appropriate 'test' script in this repo.
	testfull-regex:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	- name: Run full test suite
	run: ./test

	# Same as above, but for regex-automata, which has even more crate features!
	testfull-regex-automata:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	- name: Run full test suite
	run: ./regex-automata/test

	# Same as above, but for regex-syntax.
	testfull-regex-syntax:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	- name: Run full test suite
	run: ./regex-syntax/test

	# Same as above, but for regex-capi.
	testfull-regex-capi:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	- name: Run full test suite
	run: ./regex-capi/test

	# Runs miri on regex-automata's test suite. This doesn't quite cover
	# everything. Many tests are disabled when building with miri because of
	# how slow miri runs. But it still gives us decent coverage.
	miri-regex-automata:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	# We use nightly here so that we can use miri I guess?
	# It caught me by surprise that miri seems to only be
	# available on nightly.
	toolchain: nightly
	components: miri
	- name: Run full test suite
	run: cargo miri test -p regex-automata

	# Tests that everything is formatted correctly.
	rustfmt:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Install Rust
	uses: dtolnay/rust-toolchain@master
	with:
	toolchain: stable
	components: rustfmt
	- name: Check formatting
	run: \|
	cargo fmt --all -- --check

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ci: fix cross testing #2829

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ci: fix cross testing #2829

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