Add documentation-workflow

Author: tvdijen

.github/workflows/documentation.yml

@@ -0,0 +1,35 @@
+name: Documentation
+
+on:
+  push:
+    branches: [ master, release-* ]
+    paths:
+      - '**.md'
+  pull_request:
+    branches: [ master, release-* ]
+    paths:
+      - '**.md'
+
+jobs:
+  quality:
+    name: Quality checks
+    runs-on: [ubuntu-latest]
+
+    steps:
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2 #https://github.com/shivammathur/setup-php
+        with:
+          php-version: '8.0'
+          tools: composer:v2
+          extensions: intl, mbstring, xml
+
+      - name: Setup problem matchers for PHP
+        run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
+
+      - uses: actions/checkout@v3
+
+      - name: Lint markdown files
+        uses: nosborn/github-action-markdown-cli@v3.1.0
+        with:
+          files: .
+          ignore_path: .markdownlintignore

.github/workflows/php.yml

@@ -3,8 +3,12 @@ name: CI
 on:
   push:
     branches: [ '**' ]
+    paths-ignore:
+      - '**.md'
   pull_request:
-    branches: [ master, release-* ]
+    branches: [ master, simplesamlphp-* ]
+    paths-ignore:
+      - '**.md'
 
 jobs:
   basic-tests:
@@ -205,9 +209,3 @@ jobs:
       - name: Psalter
         continue-on-error: true
         run: php vendor/bin/psalter --issues=UnnecessaryVarAnnotation --dry-run
-
-      - name: Lint markdown files
-        uses: nosborn/github-action-markdown-cli@v3.0.1
-        with:
-          files: .
-          ignore_path: .markdownlintignore