How to use bash script from another repository in gitlab pipeline?

Question

I have two projects in Gitlab. In project A, there are Bash scripts (all located in a single folder). Project B contains a pipeline. How can I implement this? I have already tried using Git submodules, but when I try to initialize and update the submodule in the pipeline, I get an error:

Submodule 'a' (https://gitlab-ss.intranet.x.com/a) registered for path 'b'
Cloning into 'a/b'...
fatal: could not read Username for 'https://gitlab-ss.intranet.x.com': No such device or address
fatal: clone of 'https://gitlab-ss.intranet.x.com/b' into submodule path 'a/b' failed
Failed to clone 'b'.

I replaced the real project name by a, b and x

Answer 1

This is one way to do it:

1. Clone only the folder (containing the scripts) from project A to use it in the pipelines of project B using the predefined variable CI_JOB_TOKEN. More details about the predefined CI/CD variables can be found here.

    script:
        - |
          git clone --depth 1 --no-checkout https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab-ss.intranet.x.com/namespace/project_name
          cd project_name
          git sparse-checkout set --no-cone scripts_folder
          git checkout
          cd scripts_folder
          ls -a
   

2. Add execution permission to your scripts (you probably won't need this)

      chmod +x script1.sh script2.sh script3.sh
   

3. Execute the scripts

    ./script1.sh
    ./script2.sh
    ./script3.sh
   

All of the above, combined together, should be something like this:

    script:
        - |
          git clone --depth 1 --no-checkout https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab-ss.intranet.x.com/namespace/project_name
          cd project_name
          git sparse-checkout set --no-cone scripts_folder
          git checkout
          cd scripts_folder
          ls -a
          chmod +x script1.sh script2.sh script3.sh
         ./script1.sh
         ./script2.sh
         ./script3.sh