Merge pull request #7 from arduino/lint-docs-workflow

Add CI workflow to lint documentation files

Author: per1234

.github/workflows/lint-documentation.yml

@@ -0,0 +1,43 @@
+name: Lint documentation files
+
+on:
+  push:
+    paths:
+      - ".github/workflows/lint-documentation.yml"
+      - "Taskfile.yml"
+      # Recognized license files. See: https://github.com/licensee/licensee/blob/master/docs/what-we-look-at.md#detecting-the-license-file
+      - "COPYING*"
+      - "LICENCE*"
+      - "LICENSE*"
+  pull_request:
+    paths:
+      - ".github/workflows/lint-documentation.yml"
+      - "Taskfile.yml"
+      - "COPYING*"
+      - "LICENCE*"
+      - "LICENSE*"
+
+jobs:
+  check-license:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout local repository
+        uses: actions/checkout@v2
+
+      - name: Install Taskfile
+        uses: arduino/actions/setup-taskfile@master
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ruby  # Install latest version
+
+      - name: Install licensee
+        run: gem install licensee
+
+      # See: https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/licensing-a-repository
+      - name: Check license file
+        run: task --silent docs:check-license