Sending back exit signal to gitlab pipeline

Question

Is there any way to send back exit signal from the bash script to the GitLab pipeline script?

What I'm trying to do simple looks like:

install:
  stage: install
  
  script:
    - |
       echo "Dummy dry-run installation"
       chmod +x ./install-dry-run.sh
       ./install-dry-run.sh $SA_EMAIL $PROJECT_ID
  rules:
    - when: never

and bash script:

gcloud compute ssh ${instance_name} \
--quiet --tunnel-through-iap --zone=us-east4-c --ssh-key-expire-after=30s \
--project=${PROJECT_ID} \
--impersonate-service-account=${SA_EMAIL} \
--command="\
  if [ -f "/path/to/my/file.txt" ]; then echo 'Process successful'; else echo 'Process failed'; exit 1 > /dev/null; fi \
  " \
  -- -n

but that will not fail when the file is not present.

PS. Proposed solution didn't worked:

Process failed
$ if [ $? -ne 0 ]; then # collapsed multi-line command
Installation successful

it's better to use the `exit` command with a specific exit code to indicate success or failure! — Freeman, Aug 29 '23 at 16:51

Freeman · Answer 1 · 2023-08-29T19:34:33.603

change the last line of your code to exit with code 1 when the file is not present, then in your GitLab pipeline, check the exit code by using the $? variable and if the exit code is non-zero, it means the script failed!

so in your bash script do like this:

if [ -f "/path/to/my/file.txt" ]; then
  echo 'Process successful'
else
  echo 'Process failed'
  exit 1
fi

and in your GitLab script do like this

install:
  stage: install
  script:
    - |
       echo "Dummy dry-run installation"
       chmod +x ./install-dry-run.sh
       ./install-dry-run.sh $SA_EMAIL $PROJECT_ID
       EXIT_CODE=$?
       if [ $EXIT_CODE -ne 0 ]; then
         echo "Installation failed"
         # Handle failure
         exit $EXIT_CODE
       else
         echo "Installation successful"
         # Handle success
       fi
  rules:
    - when: never

update
as you see the output variable captures the output of the gcloud command and then, using the [[ $output == *"failure"* ]] condition, it checks if the output contains the word failure. If it does, it indicates a failure and the script exits with code 1. Otherwise, it considers the installation successful!

output=$(gcloud compute ssh ${instance_name} \
--quiet --tunnel-through-iap --zone=us-east4-c --ssh-key-expire-after=30s \
--project=${PROJECT_ID} \
--impersonate-service-account=${SA_EMAIL} \
--command="\
  if [ -f "/path/to/my/file.txt" ]; then echo 'success'; else echo 'failure'; fi; \
" \
-- -n)

if [[ $output == *"failure"* ]]; then
   echo "Installation failed"
   exit 1
else 
   echo "Installation successful"
fi

@JackTheKnife I changed my code,now it captures the exit code of the `install-dry-run.sh` script immediately after execution using `$?`! — Freeman, Aug 29 '23 at 18:49
still can't get it to work. Posted below something which works for me but is kind of "dirty" solution — JackTheKnife, Aug 29 '23 at 19:16

score 0 · Answer 2 · answered Aug 29 '23 at 19:02

Working but kind of "dirty" solution for install-dry-run.sh :

gcloud compute ssh ${instance_name} \
--quiet --tunnel-through-iap --zone=us-east4-c --ssh-key-expire-after=30s \
--project=${PROJECT_ID} \
--impersonate-service-account=${SA_EMAIL} \
--command="\
  if [ -f "/path/to/my/file.txt" ]; then echo 'success'; else echo 'failure'; fi; \
  " \
-- -n > status.txt

if grep -q failure status.txt; then
   echo "Installation failed"
   exit 1
else 
   echo "Installation successful"
fi

Sending back exit signal to gitlab pipeline

2 Answers2