Use buf-action in CI (#14)

This PR updates CI to use the new `buf-action` replacing `buf-setup`,
`buf-lint`, `buf-breaking` and `buf-push` unifying these tasks as one.
The new behaviour is as follows:
- On pull requests: run build, lint, format and breaking change
detection checks.
- On push: build and then push the changes of the latest commit with the
label of the current branch (e.g. main).
- On delete: archive the label associated with the delete (e.g. the
branch name of the PR).

Changes in behaviour:
- Checks no longer block pushes of commits to the BSR.
- Formatting check has been added in addition to lint and breaking.

.github/workflows/buf-ci.yaml

@@ -0,0 +1,32 @@
+name: Buf CI
+on:
+ push:
+ paths:
+ - buf.yaml
+ - buf.lock
+ - README.md
+ - LICENSE
+ - 'proto/**'
+ - '.github/workflows/buf-ci.yaml'
+ pull_request:
+ paths:
+ - buf.yaml
+ - buf.lock
+ - README.md
+ - LICENSE
+ - 'proto/**'
+ - '.github/workflows/buf-ci.yaml'
+ types: [opened, synchronize, reopened, labeled, unlabeled]
+ delete:
+permissions:
+ contents: read
+ pull-requests: write
+jobs:
+ buf:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+ - uses: bufbuild/[email protected]
+ with:
+ version: "1.32.2"
+ token: ${{ secrets.BUF_TOKEN }}