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path: root/src/tools/miri/.github/workflows/setup/action.yml
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name: "Miri CI setup"
description: "Sets up Miri CI"
inputs:
  toolchain_flags:
    description: extra flags to pass to rustup-toolchain-install-master
    required: false
    default: ''
runs:
  using: "composite"
  steps:
      - name: Show Rust version (stable toolchain)
        run: |
          rustup show
          rustc -Vv
          cargo -V
        shell: bash

      # Cache the global cargo directory, but NOT the local `target` directory which
      # we cannot reuse anyway when the nightly changes (and it grows quite large
      # over time).
      - name: Add cache for cargo
        id: cache
        uses: actions/cache@v4
        with:
          path: |
            # Taken from <https://doc.rust-lang.org/nightly/cargo/guide/cargo-home.html#caching-the-cargo-home-in-ci>.
            # Cache package/registry information
            ~/.cargo/registry/index
            ~/.cargo/registry/cache
            ~/.cargo/git/db
            # Cache installed binaries
            ~/.cargo/bin
            ~/.cargo/.crates.toml
            ~/.cargo/.crates2.json
          # Bump the version when something here changes that needs a cache reset.
          key: cargo-${{ runner.os }}-${{ runner.arch }}-${{ hashFiles('**/Cargo.lock') }}-v1
          restore-keys: cargo-${{ runner.os }}-${{ runner.arch }}

      - name: Install the tools we need
        if: steps.cache.outputs.cache-hit != 'true'
        run: cargo install -f rustup-toolchain-install-master hyperfine
        shell: bash

      - name: Install "master" toolchain
        run: |
          if [[ ${{ github.event_name }} == 'schedule' ]]; then
            echo "Building against latest rustc git version"
            git ls-remote https://github.com/rust-lang/rust/ HEAD | cut -f 1 > rust-version
          fi
          ./miri toolchain ${{ inputs.toolchain_flags }}
        shell: bash

      - name: Show Rust version (miri toolchain)
        run: |
          rustup show
          rustc -Vv
          cargo -V
        shell: bash