https://oksoft.blogspot.com/2024/09/export-to-pdf-using-linux-command.html

create_pdf.py

import uno
import argparse
from com.sun.star.beans import PropertyValue
from com.sun.star.text.ControlCharacter import PARAGRAPH_BREAK

def replace_newline(document):
    search = document.createSearchDescriptor()
    search.SearchString = '\\n'
    search.SearchRegularExpression = True

    search.ReplaceString = '\\n'
    document.replaceAll(search)

def create_file_from_template(template_path, output_path, text_content):
    # Set up the connection to LibreOffice
    local_context = uno.getComponentContext()
    resolver = local_context.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", local_context)
    context = resolver.resolve("uno:pipe,name=libreoffice;urp;StarOffice.ComponentContext")
    desktop = context.ServiceManager.createInstanceWithContext("com.sun.star.frame.Desktop", context)

    # Load the template
    template_url = uno.systemPathToFileUrl(template_path)
    document = desktop.loadComponentFromURL(template_url, "_blank", 0, ())

    text = document.Text
    cursor = text.createTextCursor()

    text.insertString(cursor, text_content.getString(), False)
    text.insertControlCharacter(cursor, PARAGRAPH_BREAK, False)

    output_url = uno.systemPathToFileUrl(output_path)
    replace_newline(document)

    pdf_export = (
        PropertyValue("FilterName", 0, "writer_pdf_Export", 0),
    )
    output_url = uno.systemPathToFileUrl("/workspace/output.pdf")
    document.storeToURL(output_url, pdf_export)
    document.dispose()

def apply_template_and_convert_to_pdf(document_path, template_path):
    # Create the LibreOffice UNO connection
    local_context = uno.getComponentContext()
    resolver = local_context.ServiceManager.createInstanceWithContext("com.sun.star.bridge.UnoUrlResolver", local_context)

    # Connect to LibreOffice
    context = resolver.resolve("uno:pipe,name=libreoffice;urp;StarOffice.ComponentContext")
    desktop = context.ServiceManager.createInstanceWithContext("com.sun.star.frame.Desktop", context)

    # Load the document
    document_url = uno.systemPathToFileUrl(document_path)
    document = desktop.loadComponentFromURL(document_url, "_blank", 0, ())
    x = document.getText()
    create_file_from_template(template_path, '/workspace/output.odt', x)

    # Close the document
    document.dispose()

if __name__ == "__main__":
    # Define command-line arguments
    parser = argparse.ArgumentParser(description="Apply template and convert to PDF")
    parser.add_argument("document", help="Path to the input document (.odt)")
    parser.add_argument("template", help="Path to the template (.ott)")

    # Parse the arguments
    args = parser.parse_args()

    # Call the function with the provided arguments
    apply_template_and_convert_to_pdf(args.document, args.template)