Create a spawn shell in Makefile - linux

Question

I want to create a makefile target in Ubuntun to spawn a poetry shell. Here are the things I want to do if I were in the command shell:
type poetry shell, which is going to spawn a shell within the virtual environment.
do something in the poetry shell, such as executing a python script using command python ...
To facilitate the process, I want to create a makefile looking something like below
# if I can set SHELL in a specific way
# SHELL = ?????
foo:
poetry shell
echo "Success"
# many lines to be executed in the poetry shell, here is an example
python <a_python_file>
The problem as I found is that the execution will be hanging after poetry shell and will not execute echo "Success"
I know this could be a general question on spawning a shell from command shell, and it is not limited to poetry. Any comments/suggestions would be appreciated.
As a comment pointed out, what I really want is python ... instead of poetry run python .... I edited it.
As a comment pointed out, I added some pseudo code in the makefile.

Answer 1

I think there's some misunderstanding. I'd never heard of poetry before but a quick look at its manual makes clear how it works.
If you run poetry shell then you get an interactive shell which you are expected to type commands into from your keyboard. The reason it "hangs" is that it started a poetry shell and is now waiting for you to enter commands. It's not hung, it's waiting for some input.
You don't want to run an interactive set of poetry commands, you have a predefined set of poetry commands you want to run. For that, you would use poetry run as mentioned in the comments above:
foo:
poetry run python <first command>
poetry run python <second command>
...
echo "Success"
If you want to run all the commands within a single instance of poetry, you have to combine them all into a single invocation, maybe something like this (I didn't try this so the quoting might be wrong):
foo:
poetry run 'python <first command> && python <second command> ...'
echo "Success"
You could do this:
foo:
poetry run $(MAKE) in-poetry
echo "Success"
in-poetry:
python <command1>
python <command2>
Now if you run make foo all the commands in the in-poetry target are run within the poetry environment, because poetry run runs a make program in its environment, and that make program runs a bunch of python.
But if someone ran make in-poetry directory (not via the foo target) then those python operations would not be run inside a poetry environment (unless the user set it up before they ran make).