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#!/bin/bash
# Install nightly Rust with a given component.
#
# If the component is unavailable on the latest nightly,
# use the latest toolchain with the component available.
#
# When using stable Rust, this script is basically unnecessary as almost components available.
#
# Refs: https://github.com/rust-lang/rustup-components-history#the-web-part
set -euo pipefail
package="${1:?}"
target="${2:-x86_64-unknown-linux-gnu}"
date=$(curl -sSf https://rust-lang.github.io/rustup-components-history/"${target}"/"${package}")
# shellcheck disable=1090
"$(cd "$(dirname "${0}")" && pwd)"/install-rust.sh nightly-"${date}"
rustup component add "${package}"
case "${package}" in
rustfmt) "${package}" -V ;;
*) cargo "${package}" -V ;;
esac
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