This snippet contains error - all aliases must be defined before they used. In fact, now it's not a valid yaml.

But if we define alias jobs first, and then define test, everything works.

stages:
  - test

# aliases must be defined before they used
.script-1: &script-1 |
  # This is a shell multi-line script to be included
  export S1_RANDOM=$(cat /dev/urandom | LC_TYPE=C tr -dc "[:alpha:]" | head -c 16)
  echo "random: $S1_RANDOM"

.script-2: &script-2 |
  # This is a shell multi-line script to be included
  export S2_RANDOM=$(cat /dev/urandom | LC_TYPE=C tr -dc "[:alpha:]" | head -c 16)
  echo "random: $S2_RANDOM"

test:
  stage: test
  image: alpine
  script:
    - *script-1
    - *script-2

Is it possible to use something like this inside multiline script.

if [[ ! -z "$DEBUG" ]] && [[ "$DEBUG" == "true" ]]; then
	JPDA="jpda"
  export JPDA_SUSPEND=y
  export JPDA_ADDRESS=0.0.0.0:8000
fi```