Rust

Added `vfs::readdir` syscall and fixed UB in the `syscall` crate #98

	name: Rust

	on:
	push:
	branches: [ "master" ]
	pull_request:
	branches: [ "master" ]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- uses: awalsh128/cache-apt-pkgs-action@latest
	with:
	packages: ninja-build lld libssl-dev qemu-system-x86
	version: 1.0

	- name: Restore rust compiler artifacts
	id: restore-rust-artifacts
	uses: actions/cache/restore@v3
	with:
	path: bin/src/rust-1.73.0-patched
	key: ${{ runner.os }}-rust-${{ hashFiles('patch/rust.diff') }}

	# Build rust compiler if cache miss
	# After building, remove all unnecessary files to reduce the cache size
	- name: Build rust compiler
	if: steps.restore-rust-artifacts.outputs.cache-hit != 'true'
	run: \|
	chmod +x ./scripts/*
	./scripts/first_build.sh
	rm -rf bin/src/rust-1.73.0/src
	rm -rf bin/src/rust-1.73.0/tests
	rm -rf bin/src/rust-1.73.0/build
	rm -rf bin/src/rust-1.73.0/target
	rm -rf bin/src/rust-1.73.0/library
	rm -rf bin/src/rust-1.73.0/compiler

	- name: Save rust compiler artifacts
	if: steps.restore-rust-artifacts.outputs.cache-hit != 'true'
	id: save-rust-artifacts
	uses: actions/cache/save@v3
	with:
	path: bin/src/rust-1.73.0-patched
	key: ${{ runner.os }}-rust-${{ hashFiles('patch/rust.diff') }}

	- name: Add x86_64-unknown-helium target
	if: steps.restore-rust-artifacts.outputs.cache-hit != 'false'
	run: ./scripts/add_user_toolchain.sh

	- name: Build kernel and userland
	run: make build

	- name: Virtualized integration tests
	run: make run-test

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