MMTk 0.29.0 #29

	name: Publish to crates.io

	on:
	# Triggered when we tag a release (including a prerelease)
	release:
	types: [published]

	concurrency:
	# Cancels pending runs when a PR gets updated.
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	cargo-publish:
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4

	# Show the Rust toolchain we are actually using
	- run: rustup show
	- run: cargo --version

	- name: Cargo login
	run: cargo login ${{ secrets.CI_CARGO_LOGIN }}
	- name: Publish sub crates
	run: \|
	cargo publish --manifest-path=macros/Cargo.toml
	# Publish MMTk core.
	# As mmtk-core depends on the crate we just publish above, in practice there could be
	# a delay before we can find the exact version for the dependent crate on crates.io.
	# The script will retry publish for 5 times with 60 seconds between the retries.
	- name: Public mmtk-core
	run: \|
	success=false

	for n in {1..5}; do
	echo "Attempt #"$n
	cargo publish && { success=true; break; }
	echo "Wait for Retry #"$n
	sleep 60
	done

	if [ "$success" = false ]; then
	echo "All attempts to publish failed."
	exit 1
	fi

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