Automatically write common files

Home-manager provides the option to write some files at rebuild using the awesome utility home.file

Below is an example of this being used to write out the annoying but always neccesary .ssh/config file.

  home = {
    file = {
      ".ssh/config".text = ''
        Host gitlab.com
          IdentityFile ~/.ssh/gitlab

        Host github.com
          IdentityFile ~/.ssh/gitlab
      '';
    };
  };