pipes inside a miltiline script in Bitbucket Pipeline

[Agastya Bisht]

Hi

I was trying to run a pipe based on a specific condition in the script. The condition is multiline scripts.
I want to implement something like the below but I am getting errors. Please guide.

script:
   - >- if [ "$Var" = True ]; then
            - pipe: atlassian/aws-code-deploy:1.1.1
                variables:
                       <A>
         fi
   - >- if [ "$Var" = False ]; then
            - pipe: atlassian/aws-code-deploy:1.1.1
                variables:
                       <B>
         fi

[Patrik S · Accepted solution]

Hello @Agastya Bisht ,

Welcome to Atlassian Community!

I'm afraid it's currently not possible to condition the execution of pipes in Bitbucket Pipelines, as bash does not recognize the "pipe" as a valid command. We have a feature request to implement that functionality, which you can check in the following link : 

•  https://jira.atlassian.com/browse/BCLOUD-20555

I would suggest you to add your vote there, since this helps both developers and product managers to understand the interest. Also, make sure you add yourself as a watcher in case you want to receive first-hand updates from that ticket. Please note that all features are implemented with this policy in mind.

While this feature is not implemented, one workaround I can think of is separating the conditions into multiple steps, and finishing the step early with an exit 0 in case the condition is not met. Please refer to the example below : 

image: atlassian/default-image:3
pipelines:
  default:
    - step: 
       name: "Execute when the variable is true"
       script: 
         - if [ "$VAR" != true ]; then exit 0 ; fi # Finish the step if the $VAR value is not true
         - pipe: atlassian/aws-code-deploy:1.1.1 
           variables: <A>

    - step: 
       name: "Execute when the variable is false"
       script: 
         - if [ "$VAR" != false ]; then exit 0 ; fi # Finish the step if the $VAR value is not false
         - pipe: atlassian/aws-code-deploy:1.1.1 
           variables: <B>

Hope that helps! Let me know in case you have any questions.

Thank you, @Agastya Bisht .

Kind regards,

Patrik S

[François Collins]

FWIW, I found there is a way to achieve some limited conditional logic following this syntax:

image: atlassian/default-image:4

pipelines:

  default:

    - step: 

       name: "Execute when the variable is true"

       script: 

         - if [ "$VAR" != true ]; then 

         - pipe: atlassian/aws-code-deploy:1.1.1 

           variables: 

             SOME_VARIABLE: BlahBlah

         - fi

         - echo "Done."

In order for it to work, the pipe statement must immediately follow the "then", if, pipe and fi statements must be separate elements of the script array (no code block using - | or - >) and one downside is that the step logging becomes weird. It will output one log item for the condition, and one log item for pipe: that will actually contain what comes after (echo "Done.").

But it does work.

[Agastya Bisht]

Thank you, Patrik
Your provided solution worked for me.