github-actions: use them (#45)

Author: v1v

.buildkite/scripts/verify.sh

@@ -5,7 +5,7 @@ set -euo pipefail
 echo "--- Pre install"
 source .buildkite/scripts/pre-install-command.sh
 add_bin_path
-go install mvdan.cc/gofumpt@latest
+go install mvdan.cc/gofumpt@v0.4.0
 go install github.com/elastic/go-licenser@latest
 
 echo "--- verify"

.github/CODEOWNERS

@@ -0,0 +1,2 @@
+# CI workflows
+/.github/workflows/ @elastic/observablt-ci

.github/dependabot.yml

@@ -0,0 +1,14 @@
+---
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directories:
+      - "/"
+    schedule:
+      interval: "weekly"
+      day: "sunday"
+      time: "22:00"
+    groups:
+      github-actions:
+        patterns:
+          - "*"

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+---
+name: ci
+
+on:
+  push:
+    branches: 
+      - main
+  pull_request:
+  merge_group:
+
+# limit the access of the generated GITHUB_TOKEN
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: |
+          go install mvdan.cc/gofumpt@v0.4.0
+          go install github.com/elastic/go-licenser@latest
+      - run: |
+          go mod verify
+          go-licenser -d
+          [ "$(gofumpt -l $(find . -name "*.go") | wc -l)" -gt 0 ] && exit 1 || echo "passed"
+
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ['ubuntu-22.04', 'windows-2022']
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+      - run: go test -v ./...