Fix: Stirling-PDF > LibreOffice/unoconv Integration Issues (#1322)

* Modify install script to install core libreoffice components. Configure a running libreoffice service and setup env variables so they are accessible to StirlingPDF. Modify stirlingPDF service to wait for libreoffice service to start. Enable and explicitly start libreoffice and stirlingPDF services.

* Apply suggestions from code review

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* Update stirling-pdf-install.sh

---------

Co-authored-by: Michel Roegl-Brunner <michel.roegl-brunner@htl-braunau.at>

install/stirling-pdf-install.sh

@@ -36,7 +36,11 @@ msg_info "Installing LibreOffice Components"
 $STD apt-get install -y \
   libreoffice-writer \
   libreoffice-calc \
-  libreoffice-impress
+  libreoffice-impress \
+  libreoffice-core \
+  libreoffice-common \
+  libreoffice-base-core \
+  python3-uno
 msg_ok "Installed LibreOffice Components"
 
 msg_info "Installing Python Dependencies"
@@ -75,8 +79,8 @@ msg_ok "Installed Language Packs"
 
 msg_info "Installing Stirling-PDF (Additional Patience)"
 RELEASE=$(curl -s https://api.github.com/repos/Stirling-Tools/Stirling-PDF/releases/latest | grep "tag_name" | awk '{print substr($2, 3, length($2)-4) }')
-wget -q https://github.com/Stirling-Tools/Stirling-PDF/archive/refs/tags/v$RELEASE.tar.gz
+wget -q https://github.com/Stirling-Tools/Stirling-PDF/archive/refs/tags/v${RELEASE}.tar.gz
-tar -xzf v$RELEASE.tar.gz
+tar -xzf v${RELEASE}.tar.gz
 cd Stirling-PDF-$RELEASE
 chmod +x ./gradlew
 $STD ./gradlew build
@@ -86,37 +90,66 @@ mv ./build/libs/Stirling-PDF-*.jar /opt/Stirling-PDF/
 mv scripts /opt/Stirling-PDF/
 ln -s /opt/Stirling-PDF/Stirling-PDF-$RELEASE.jar /opt/Stirling-PDF/Stirling-PDF.jar
 ln -s /usr/share/tesseract-ocr/5/tessdata/ /usr/share/tessdata
-msg_ok "Installed Stirling-PDF v$RELEASE"
+msg_ok "Installed Stirling-PDF"
 
 msg_info "Creating Service"
-cat <<EOF >/etc/systemd/system/stirlingpdf.service
+# Create LibreOffice listener service
+cat <<EOF >/etc/systemd/system/libreoffice-listener.service
 [Unit]
-Description=Stirling-PDF service
+Description=LibreOffice Headless Listener Service
-After=syslog.target network.target
+After=network.target
 
 [Service]
-SuccessExitStatus=143
+Type=simple
-
 User=root
 Group=root
-
+ExecStart=/usr/lib/libreoffice/program/soffice --headless --invisible --nodefault --nofirststartwizard --nolockcheck --nologo --accept="socket,host=127.0.0.1,port=2002;urp;StarOffice.ComponentContext"
-Type=simple
+Restart=always
-EnvironmentFile=/opt/Stirling-PDF/.env
-WorkingDirectory=/opt/Stirling-PDF
-ExecStart=/usr/bin/java -jar Stirling-PDF.jar
-ExecStop=/bin/kill -15 %n
 
 [Install]
 WantedBy=multi-user.target
 EOF
-systemctl enable -q --now stirlingpdf.service
+
+# Set up environment variables
+cat <<EOF >/opt/Stirling-PDF/.env
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/libreoffice/program
+UNO_PATH=/usr/lib/libreoffice/program
+PYTHONPATH=/usr/lib/python3/dist-packages:/usr/lib/libreoffice/program
+LD_LIBRARY_PATH=/usr/lib/libreoffice/program
+EOF
+
+cat <<EOF >/etc/systemd/system/stirlingpdf.service
+[Unit]
+Description=Stirling-PDF service
+After=syslog.target network.target libreoffice-listener.service
+Requires=libreoffice-listener.service
+
+[Service]
+SuccessExitStatus=143
+Type=simple
+User=root
+Group=root
+EnvironmentFile=/opt/Stirling-PDF/.env
+WorkingDirectory=/opt/Stirling-PDF
+ExecStart=/usr/bin/java -jar Stirling-PDF.jar
+ExecStop=/bin/kill -15 %n
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# Enable and start services
+systemctl enable -q --now libreoffice-listener
+systemctl enable -q --now stirlingpdf
 msg_ok "Created Service"
 
 motd_ssh
 customize
 
 msg_info "Cleaning up"
-rm -rf v$RELEASE.tar.gz /zulu-repo_1.0.0-3_all.deb
+rm -rf v${RELEASE}.tar.gz /zulu-repo_1.0.0-3_all.deb
 $STD apt-get -y autoremove
 $STD apt-get -y autoclean
 msg_ok "Cleaned"