Is it possible to loop a Github Actions step? - github-actions

Question

I have a Github Actions workflow dealing with new releases. Some last steps build the application for different platforms. Instead of creating multiple steps where each one builds for a different platform or creating a step running multiple commands I'm looking for a way to loop a step for each item in an array.
I know there is a matrix for jobs so this is my pseudo implementation to show what I'm looking for
jobs:
do_it:
runs-on: ubuntu-latest
steps:
- name: For each entry in the array...
strategy:
matrix:
target: [ this, that, something ]
run: echo ${{ matrix.target }}
Is it possible to create something similiar to a matrix so it will loop the step multiple times?
As a sidenote, I know there is a similiar question Using an array of values to repeat a step in GitHub Actions workflow but I don't want to split the job into multiple jobs because then I have to deal with all the build artifacts.

Answer 1

To loop the step multiple times, try something like this:
jobs:
do_it:
runs-on: ubuntu-latest
steps:
- name: For each entry in the array...
env:
PLATFORMS: [ linux, macOs, windows ]
run: |
platform_list=$(echo "${{ env.PLATFORMS }}" | tr -d '[],')
for target in $platform_list; do
echo "Building for $target platform..."
# make $target done
done
Here -- basically, the env step sets an environment variable PLATFORMS to an array of values, and the run step uses a shell for loop to iterate through the values in the array.