Versioning :: RuboCop Docs (original) (raw)

In the early versions of RuboCop a common source of frustration was that new cops were added to pretty much every release, and as they were enabled by default, every upgrade resulted in broken CI builds and trying to figure out what exactly was changed. After considering many options to address this eventually we opted for an approach that limits these type of changes to major RuboCop releases.

Now new cops introduced between major versions are set to a special pending status and are not enabled by default. A warning is emitted if such cops are not explicitly enabled or disabled in the user configuration. Here’s one such message:

The following cops were added to RuboCop, but are not configured. Please set Enabled to either true or false in your .rubocop.yml file:

You can see that 3 new cops were added in RuboCop 0.80 and it’s up to you to decide if you want to enable or disable them.

| | Occasionally, some new cops will be introduced as disabled by default. Usually, this means that we believe that the cop is useful, but not for everyone. Typical cases might be the enforcement of programming styles that are not very common in the wild, or cops that yield too many false positives (so you’d run them manually from time to time, instead of running them all the time). | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Enabling/Disabling Pending Cops in Bulk

To suppress this message set NewCops to either enable or disable in your .rubocop.yml file. You can use following configuration or the --enable-pending-cops command-line option, to enable all pending cops in bulk:

Alternatively, you can use following configuration or the --disable-pending-cops command-line option, to disable all pending cops in bulk:

AllCops:
  NewCops: disable

| | The command-line options takes precedence over .rubocop.yml file. | | -------------------------------------------------------------------- |

Enabling/Disabling Individual Pending Cops

Finally, you can enable/disable individual pending cops by setting their Enabled configuration to either true or false in your .rubocop.yml file:

Style/ANewCop is an example of a newly added pending cop:

Style/ANewCop:
  Enabled: true

or

Style/ANewCop:
  Enabled: false

| | On major RuboCop version updates (e.g. 1.0 → 2.0), all pending cops are enabled in bulk. | | ----------------------------------------------------------------------------------------------- |