Paperless-AI: Add RAG chat (#4635)

* Add RAG

* Oops

ct/paperless-ai.sh

@@ -27,6 +27,9 @@ function update_script() {
     msg_error "No ${APP} Installation Found!"
     exit
   fi
+  if ! dpkg -s python3-pip >/dev/null 2>&1; then
+    $STD apt-get install -y python3-pip
+  fi
   RELEASE=$(curl -fsSL https://api.github.com/repos/clusterzx/paperless-ai/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
   if [[ "${RELEASE}" != "$(cat /opt/${APP}_version.txt)" ]] || [[ ! -f /opt/${APP}_version.txt ]]; then
     msg_info "Stopping $APP"
@@ -42,6 +45,25 @@ function update_script() {
     mkdir -p /opt/paperless-ai/data
     cp -a /opt/paperless-ai_bak/data/. /opt/paperless-ai/data/
     cd /opt/paperless-ai
+    if [[ ! -f /etc/systemd/system/paperless-rag.service ]]; then
+      cat <<EOF >/etc/systemd/system/paperless-rag.service
+[Unit]
+Description=PaperlessAI-RAG Service
+After=network.target
+
+[Service]
+WorkingDirectory=/opt/paperless-ai
+ExecStart=/usr/bin/python3 main.py --host 0.0.0.0 --port 8000 --initialize
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+EOF
+      echo "RAG_SERVICE_URL=http://localhost:8000" >>/opt/paperless-ai/data/.env
+      echo "RAG_SERVICE_ENABLED=true" >>/opt/paperless-ai/data/.env
+    fi
+    $STD pip install --no-cache-dir -r requirements.txt
+    mkdir -p data/chromadb
     $STD npm install
     echo "${RELEASE}" >/opt/${APP}_version.txt
     msg_ok "Updated $APP to v${RELEASE}"