.github/actions/setup-rustup/action.yaml

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name: Install rustup
description: 'Install rustup and the toolchain from rust-toolchain.toml on a runner without Rust, such as ubuntu-slim'
runs:
  using: "composite"
  steps:
    - name: Install rustup and the toolchain
      shell: bash
      run: |
        RETRY=("ci/scripts/retry" timeout 120)
        "${RETRY[@]}" curl -sSf -o "$RUNNER_TEMP/rustup-init.sh" https://sh.rustup.rs
        sh "$RUNNER_TEMP/rustup-init.sh" -y --no-modify-path --profile minimal --default-toolchain none
        CARGO_BIN="${CARGO_HOME:-$HOME/.cargo}/bin"
        export PATH="$CARGO_BIN:$PATH"
        echo "$CARGO_BIN" >> "$GITHUB_PATH"
        # With no toolchain argument, rustup installs the toolchain and the
        # components that rust-toolchain.toml names.
        "${RETRY[@]}" rustup toolchain install
    - name: Configure rust runtime env
      uses: ./.github/actions/setup-rust-runtime