## Filter predicate `Branch`

_Want:_ We can allow an event that is about a specific branch.

_Why:_ We want to constrain CI to specific branches, such as the

`main` branch.

~~~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 a Git repository other in the Radicle node

given file config.yaml from filter-branch.yaml

when I run cibtool --db ci-broker.db trigger --repo xyzzy

when I run cibtool --db ci-broker.db trigger --repo other --ref oksa

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

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

then stdout contains ""repo_name": "xyzzy""

then stdout doesn't contain ""repo_name": "other""

~~~

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

db: ci-broker.db

adapters:

  default:

    command: ./adapter.sh

triggers:

  - adapter: default

    filters:

      - !Branch "main"

~~~