steps:
  - bash: |
      set -e
      toolchain=$TOOLCHAIN
      if [ "$toolchain" = "" ]; then
        toolchain=stable
      fi
      if command -v rustup; then
        rustup update $toolchain
        rustup default $toolchain
      else
        curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $toolchain
        echo "##vso[task.prependpath]$HOME/.cargo/bin"
      fi
    displayName: Install rust (unix)
    condition: ne( variables['Agent.OS'], 'Windows_NT' )

  - powershell: |
      if (!$env:TOOLCHAIN) {
        $env:TOOLCHAIN = "stable-${env:TARGET}";
      }
      if ($env:RUSTUP_HOME) {
        rustup update --no-self-update $env:TOOLCHAIN
        rustup default $env:TOOLCHAIN
      } else {
        curl.exe -sSf -o rustup-init.exe https://win.rustup.rs
        ./rustup-init.exe -y --default-toolchain $env:TOOLCHAIN
      }
    displayName: Install rust (windows)
    condition: eq( variables['Agent.OS'], 'Windows_NT' )

  - script: |
        rustc -Vv
        cargo -V
    displayName: Query rust and cargo versions