how to run a command in host before entering docker container in github ci

Question

Im trying to install a package on the host system i.e (ubuntu-latest) before entering the docker container (arch linux)

I tried a lot of syntax but Im getting it wrong

on: [push]
jobs:
  update-aur:
    runs-on: ubuntu-latest
    steps:
      - run : sudo apt-get install runc
    container: archlinux
    steps:
      - run: |
          pacman --noconfirm -Syu 
          pacman --noconfirm -S base-devel 

this gives an error of steps is already defined

Answer 1

If the running machine configuration is important for the build, try using self-hosted runner.

1. You can create VM in some of the cloud providers (ex. AWS, Azure, etc.) and register it with GitHub-CI.
2. Install the GitHub-CI service
3. Install all the utilities you need
4. Register the runner to the repository
5. Change the build script for run-on to point to the self-hoster runner

You can find more information in the GitHub-CI Docs