Use `cargo tree` to determine feature dependent optional deps (#2636) #5

	---
	name: Release Cargo-bazel
	on:
	workflow_dispatch:
	push:
	branches:
	- main
	paths:
	- crate_universe/version.bzl

	defaults:
	run:
	shell: bash

	jobs:
	validation:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v3
	# TODO: Unfortunately it's not obvious how to restrict `workflow_dispatch` to a particular branch
	# so this step ensures releases are always done off of `main`.
	- name: Ensure branch is 'main'
	run: \|
	git fetch origin &> /dev/null
	branch="$(git rev-parse --abbrev-ref HEAD)"
	if [[ "${branch}" != "main" ]]; then
	echo "The release branch must be main. Got '${branch}'' instead." >&2
	exit 1
	else
	echo "Branch is '${branch}'"
	fi
	builds:
	needs: validation
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v3
	- name: Install rust toolchains for host
	run: \|
	# Detect the current version of rust
	version="$(grep 'DEFAULT_RUST_VERSION =' ./rust/private/common.bzl \| grep -o '[[:digit:].]\+')"
	rustup override set "${version}"
	rustup update stable && rustup default stable
	- name: Publish to crates.io
	run: cargo publish --token ${CRATES_TOKEN}
	working-directory: ./crate_universe
	env:
	CRATES_TOKEN: ${{ secrets.CRATES_TOKEN }}

Provide feedback