We have a special Jira setup so that 1 Epic in our master project = 1 Jira project full of stories/bugs/etc (Governance/compliance wanted this)
Each Issue type has a custom column called 'Ideal days'
For each Epic to get the total estimated days we have a custom function that Sums all 'Ideal days' of issues linked to that Epic that are in the backlog (we manually do this).
With Groovy Runner can I auto-link all issues in a project (in the backlog) to an Epic? Thanks