File iotas-optional-pypandoc.patch of Package iotas

From 2dccbf2b1b10b7dea0f2c2dbe12ece4abd7daa72 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ball=C3=B3=20Gy=C3=B6rgy?= <ballogyor@gmail.com>
Date: Mon, 14 Apr 2025 18:44:54 +0200
Subject: [PATCH] feat: Make pypandoc optional

Pypandoc is a huge dependency and it's needed only for ODT and custom
defined export formats, while exporting to HTML and PDF still works without
it.
---
 iotas/exporter.py | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

Index: iotas-0.12.0/iotas/exporter.py
===================================================================
--- iotas-0.12.0.orig/iotas/exporter.py
+++ iotas-0.12.0/iotas/exporter.py
@@ -8,7 +8,10 @@ import shutil
 from typing import Optional
 import unicodedata
 
-import pypandoc
+try:
+    import pypandoc
+except ModuleNotFoundError:
+    pypandoc = None
 
 from iotas.attachment_helpers import (
     AttachmentsCopyOutcome,
@@ -157,20 +160,24 @@ class Exporter(GObject.Object):
         content = get_note_export_content(self.__note, prefix_note_id=True)
         working_dir = os.path.abspath(os.path.join(get_attachments_dir(), os.pardir))
 
-        try:
-            pypandoc.convert_text(
-                content,
-                out_format,
-                format="gfm+attributes+implicit_figures",
-                outputfile=self.__location,
-                cworkdir=working_dir,
-            )
-        except (RuntimeError, OSError) as e:
-            logging.warning(f"Failed to export {out_format} to {self.__location}: {e}")
-            self.emit("failed", str(e))
+        if pypandoc:
+            try:
+                pypandoc.convert_text(
+                    content,
+                    out_format,
+                    format="gfm+attributes+implicit_figures",
+                    outputfile=self.__location,
+                    cworkdir=working_dir,
+                )
+            except (RuntimeError, OSError) as e:
+                logging.warning(f"Failed to export {out_format} to {self.__location}: {e}")
+                self.emit("failed", str(e))
         else:
-            logging.info(f"Exported {self.__out_format} to {self.__location}")
-            self.emit("finished", self.__location)
+            logging.warning(
+                f"Failed to export {out_format} to {self.__location}: "
+                "Pypandoc is not installed on your system."
+            )
+            self.emit("failed", self.__out_format, "Pypandoc is not installed on your system.")
         self.__active = False
 
     def __export_pdf(self) -> None: