github ci workflow

rust.yml

name: Rust

on: [push, pull_request]

jobs:
  test:
    name: ${{ matrix.rust }} on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [macOS-latest, ubuntu-latest] # windows-latest, macOS-latest
        rust: [nightly]
    steps:
    - uses: actions/checkout@v1
    - name: Install rustup
      if: matrix.os == 'macOS-latest'
      run: |
        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain=${{ matrix.rust }} -y
        export PATH="$HOME/.cargo/bin:$PATH"
    - name: Set toolchain
      run: |
        export PATH="$HOME/.cargo/bin:$PATH"
        rustup override set ${{ matrix.rust }}
        rustup update
        rustup component add rustfmt
        rustc --version
        cargo --version
        rustup --version
    - name: Cargo check
      run: |
        export PATH="$HOME/.cargo/bin:$PATH"
        cargo check --all --benches --bins --examples --tests
      # env:
      #   RUSTFLAGS: "-D warnings"
    - name: Cargo test
      run: |
        export PATH="$HOME/.cargo/bin:$PATH"
        cargo test --all --verbose
    - name: Cargo fmt
      run: |
        export PATH="$HOME/.cargo/bin:$PATH"
        cargo fmt --all -- --check

I couldn't get the export PATH stuff to properly persist. If I add it to bashrc and then source it, nvm apparently trips up. This was the best way to make things work on the short term (though it's not pretty).