workflows: add a independent workflow for wikiupdater

.github/workflows/testbuild.yml

@@ -1,6 +1,6 @@
 ---
 name: Test Build
-on: [pull_request] # yamllint disable-line rule:truthy
+on: [pull_request]  # yamllint disable-line rule:truthy
 
 jobs:
   build:

.github/workflows/wikiupdate.yml

@@ -0,0 +1,35 @@
+---
+name: Wikiupdate
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches:
+      - master
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install dependencies
+        run: sudo apt install python3
+
+      - name: Install dependencies
+        run: pip3 install -r requirements.txt --upgrade pip
+
+      - name: Determine changed locations
+        run: |
+            CHANGED_LOCATIONS=$(git diff ${{ github.event.before }}..${{ github.event.after }} --diff-filter=d --name-only | grep 'locations/' | sed 's/locations\/\(.*\)\.yml/location_\1/' | sed -z 's/-/_/g;s/\n/,/g;s/,$//')
+            echo "Updating for changed locations: $CHANGED_LOCATIONS"
+            echo "CHANGED_LOCATIONS=$CHANGED_LOCATIONS" >> "$GITHUB_ENV"
+
+      - name: Update wiki.freifunk.net
+        run: |
+          if [ -n "${CHANGED_LOCATIONS}" ]; then
+            ansible-playbook play.yml --tags wiki --limit "$CHANGED_LOCATIONS" ||true
+          else
+            echo "No locations were changed. Skipping update"
+          fi