How to run a script inside gitlab ci docker executor?

Question

I am trying to run a script inside the docker container.

I tried using docker cp but it does not work as there are no running containers. docker container ls is empty.

Locally I am able to docker cp my-custom-image:my_script.py my_script.py so the problem is not with my docker image.

stage-name:
  image: "my-custom-image:0.1.0"
  stage: my-stage
  script:
    - python3 my_script.py

Answer 1

I finally found the solution

In the dockerfile of my-custom-image , I added these lines

COPY ./my_script.py /usr/local/bin/my_script.py
RUN chmod +x /usr/local/bin/my_script.py

I added python3 shebang in my_script.py

#!/usr/local/bin/python3

Then I am able to execute the script in the CI

stage-name:
  image: "my-custom-image:0.1.0"
  stage: my-stage
  script:
    - my_script.py