CI Config Migration Guide

As of May 19, 2021, Flutter has migrated away from using try_builders.json and prod_builders.json to a single .ci.yaml file for CI configuration. Currently, they are more or less equivalent, with only a few differences.

The official source of truth for the new .ci.yaml is scheduler.proto. It specifies default values for fields that have them.

A sample, minimal migration occurred in #82870. In that change, these JSON files:

# dev/prod_builders.json
    {
      "name": "Linux analyze",
      "repo": "flutter",
      "task_name": "linux_analyze",
      "flaky": false
    },

# dev/try_builders.json
    {
      "name": "Linux analyze",
      "repo": "flutter",
      "task_name": "linux_analyze",
      "enabled": true
    },

Became:

# .ci.yaml 
 - name: linux_analyze
    builder: Linux analyze
    scheduler: luci

Field Mappings

What follows are mappings from the field name in the *_builders.json file to the corresponding field in .ci.yaml.

try_builders.json

• name -> builder
• repo is unused in .ci.yaml.
• task_name -> name
• enabled -> presubmit (defaults to true)
• run_if -> run_if

prod_builders.json

• name -> builder
• repo is unused in .ci.yaml.
• task_name -> name
• flaky -> bringup (defaults to false)