bitbucket-pipelines.yml validator should correctly handle the bash test command

Problem

The Bitbucket bitbucket-pipelines.yml validator is not properly validating a command if it starts with the bash test command ”[[ expression ]]”.

Steps to reproduce

Create a a pipeline with a test like shown in the image above

Workaround

Wrap up the test command with an IF command like described below.

The command:

{{[ $BITBUCKET_BRANCH =~ [A-Z][a-z]+-[0-9]

{2,} ] && export BRANCH = $BASH_REMATCH[0]}}

Will become:

{{if [ $BITBUCKET_BRANCH =~ [A-Z][a-z]+-[0-9]{2,}

]; then export BRANCH = $BASH_REMATCH[0]; fi}}