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(-)

diff --git a/iotas/exporter.py b/iotas/exporter.py
index 313d877..64e3a83 100644
--- a/iotas/exporter.py
+++ b/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.html_generator import HtmlGenerator
 from iotas.note import Note
@@ -122,16 +125,23 @@ class Exporter(GObject.Object):
 
     def __export_pandoc(self, out_format: str) -> None:
         self.__active = True
-        try:
-            pypandoc.convert_text(
-                self.__note.content, out_format, format="gfm", outputfile=self.__location
-            )
-        except (RuntimeError, OSError) as e:
-            logging.warning(f"Failed to export {out_format} to {self.__location}: %s", e)
-            self.emit("failed", self.__out_format, str(e))
+        if pypandoc:
+            try:
+                pypandoc.convert_text(
+                    self.__note.content, out_format, format="gfm", outputfile=self.__location
+                )
+            except (RuntimeError, OSError) as e:
+                logging.warning(f"Failed to export {out_format} to {self.__location}: %s", e)
+                self.emit("failed", self.__out_format, str(e))
+            else:
+                logging.info(f"Exported {self.__out_format} to {self.__location}")
+                self.emit("finished", self.__out_format, self.__location)
         else:
-            logging.info(f"Exported {self.__out_format} to {self.__location}")
-            self.emit("finished", self.__out_format, 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:
-- 
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