How to invoke bash, run commands inside the new shell, and then give control back to user?

Question

This must either be really simple or really complex, but I couldn't find anything about it... I am trying to open a new bash instance, then run a few commands inside it, and give the control back to the user inside that same instance.

I tried:

$ bash -lic "some_command" 

but this executes some_command inside the new instance, then closes it. I want it to stay open.

One more detail which might affect answers: if I can get this to work I will use it in my .bashrc as alias(es), so bonus points for an alias implementation!

Answer 1

bash --rcfile <(echo '. ~/.bashrc; some_command') 

dispenses the creation of temporary files. Question on other sites:

• https://serverfault.com/questions/368054/run-an-interactive-bash-subshell-with-initial-commands-without-returning-to-the
• https://unix.stackexchange.com/questions/123103/how-to-keep-bash-running-after-command-execution