## Filter predicate `BranchUpdated`

_Want:_ We can allow an event for a branch having been updated.

_Why:_ We want to constrain CI to only updated branches, as distinct

from new branches.

~~~scenario

given a Radicle node, with CI configured with broker.yaml and adapter dummy.sh

given a Git repository xyzzy in the Radicle node

given file config.yaml from filter-branchupdated.yaml

when I run cibtool --db ci-broker.db event add --repo xyzzy --ref main --commit HEAD --kind branch-updated --base main

when I run cibtool --db ci-broker.db event add --repo xyzzy --ref oksa --commit HEAD --kind branch-created

when I run ./env.sh cib --config config.yaml queued

when I run cibtool --db ci-broker.db run list --json

then stdout contains "main"

then stdout doesn't contain "oksa"

~~~

~~~{#filter-branchupdated.yaml .file .json}

db: ci-broker.db

adapters:

  default:

    command: ./adapter.sh

triggers:

  - adapter: default

    filters:

      - !BranchUpdated

~~~