add support for buf (#10112)

* add support for buf

Co-authored-by: Alex McKinney <alexmckinney01@gmail.com>
Signed-off-by: Rémy Léone <rleone@scaleway.com>

.github/workflows/buf.yml

@@ -0,0 +1,20 @@
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  steps:
+    - uses: actions/checkout@v2
+    - uses: bufbuild/buf-setup-action@v0.6.0
+    - uses: bufbuild/buf-lint-action@v1
+      with:
+        input: 'prompb'
+    - uses: bufbuild/buf-breaking-action@v1
+      with:
+        input: 'prompb'
+        against: 'https://github.com/prometheus/prometheus.git#branch=main,ref=HEAD~1,subdir=prompb'
+    - uses: bufbuild/buf-push-action@v1
+      with:
+        input: 'prompb'
+        buf_token: ${{ secrets.BUF_TOKEN }}

prompb/buf.lock

@@ -0,0 +1,10 @@
+# Generated by buf. DO NOT EDIT.
+version: v1
+deps:
+  - remote: buf.build
+    owner: gogo
+    repository: protobuf
+    branch: main
+    commit: 4df00b267f944190a229ce3695781e99
+    digest: b1-sjLgsg7CzrkOrIjBDh3s-l0aMjE6oqTj85-OsoopKAw=
+    create_time: 2021-08-10T00:14:28.345069Z

prompb/buf.yaml

@@ -0,0 +1,4 @@
+version: v1
+name: buf.build/prometheus/prometheus
+deps:
+  - buf.build/gogo/protobuf