Announcing Boolean Operators in Conditions

Over the years, Mergify users wish they could be more expressive in the way they write their pull request rules. As those rules are a combination of conditions, being able to use or and and operators inside those expressions is a must-have.

We are pleased to announce that this long-awaited feature is now generally available.

Combining Conditions

Without those operators, many of the constraints are difficult to express with Mergify pull request rules conditions. If you wanted to apply an action for only a couple of author, you had to duplicate your rule and write something along the line:

pull_request_rules:
  - name: Queue for merge pull request for alice
    conditions:
      - author=alice
    actions:
      queue:
 
  - name: Queue for merge pull request for bob
    conditions:
      - author=bob
    actions:
      queue:

This ruleset works fine, but is verbose and duplicates a single rule. It's a little cumbersome to manage.

With the new or operator, it becomes easy to merge the two rules into a single one:

pull_request_rules:
  - name: Queue for merge pull request for alice or bob
    conditions:
      - or:
        - author=bob
        - author=alice
    actions:
      queue:

You can combine multiple operators, and nest them up to 3 levels.

pull_request_rules:
  - name: Queue for merge pull request for alice or bob or sam if urgent
    conditions:
      - or:
        - author=bob
        - author=alice
        - and:
          - author=sam
          - label=urgent
    actions:
      queue:

Combining works on any conditions and allows you to fully express the rule as you wish.

With this feature being generally available, we hope that every user will now be able to express their rules in a simple and more maintainable manner.