[Conversion Output] Markdown Output. Test and seek for help.

[The_book]

I create a Markdown Output plugin. This is nothing new, just the function of TXT Output plugin with txt_output_formatting=markdown, and keep_links=True, keep_image_references=True in default. keep_color have been removed for it is a function in textile. I create this, so that I don't need to set them and rename .txt to .md everytime.

I think this can work, but I still have some questions.

1. How to set opts in function convert? I use setattr, am I right?
2. How to create output gui that can be uesd in Calibre?

[The_book]

And, by the way. I think let build-in plugins the same as outer plugin is a better idea. Now they cannot be removed and hard to change.

[kovidgoyal]

1. yes
2. You implement gui_configuration_widget() in your plugin

[The_book]

Originally Posted by kovidgoyal

1. yes
2. You implement gui_configuration_widget() in your plugin

Thanks.
I update this plugin. Now it has gui in convert.
And now it has more questions.

1. It can convert to Markdown when I use ebook-convert.exe try.epub .md but when I use gui, it prints

calibre, version 4.12.0 (win32, embedded-python: True)
Conversion error: Failed: Convert book 1 of 1 (***)

Convert book 1 of 1 (***)
Failed to initialize plugin: u'C:\\Users\\LJT\\AppData\\Roaming\\calibre\\plugi ns\\Markdown Output.zip'
Python function terminated unexpectedly
No plugin to handle output format: md (Error Code: 1)
Traceback (most recent call last):
File "site.py", line 114, in main
File "site.py", line 88, in run_entry_point
File "site-packages\calibre\utils\ipc\worker.py", line 209, in main
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 43, in gui_convert_override
File "site-packages\calibre\gui2\convert\gui_conversion.py", line 25, in gui_convert
File "site-packages\calibre\ebooks\conversion\plumber.py", line 758, in __init__
ValueError: No plugin to handle output format: md

2. I can see gui in convert widget like image_8.png. How to remove formatting and keep text color?

3. Preference->Output options do not have markdown output. What can I do?

[kovidgoyal]

Thats because your plugin is failing initialization

Failed to initialize plugin: u'C:\\Users\\LJT\\AppData\\Roaming\\calibre\\plugi ns\\Markdown Output.zip'

[The_book]

Originally Posted by kovidgoyal

Thats because your plugin is failing initialization

Failed to initialize plugin: u'C:\\Users\\LJT\\AppData\\Roaming\\calibre\\plugi ns\\Markdown Output.zip'

But ebook-convert cli works well. I can not understand why.

[kovidgoyal]

Run calibre in debug mode (right click preferences button) and you will get more information

[The_book]

Originally Posted by kovidgoyal

Run calibre in debug mode (right click preferences button) and you will get more information

After checking, it happens in src\calibre\customize\ui.py line 713

    for zfp in list(external_plugins) + builtin_plugins:
        try:
            if not isinstance(zfp, type):
                # We have a plugin name
                pname = zfp
                zfp = os.path.join(plugin_dir, zfp+'.zip')
                if not os.path.exists(zfp):
                    zfp = external_plugins[pname]
            try:
                plugin = load_plugin(zfp) if not isinstance(zfp, type) else zfp
            except PluginNotFound:
                continue
            if perf:
                st = time.time()
            plugin = initialize_plugin(plugin, None if isinstance(zfp, type) else zfp)
            if perf:
                times[plugin.name] = time.time() - st
            _initialized_plugins.append(plugin)
        except:
            print('Failed to initialize plugin:', repr(zfp))
            traceback.print_exc()
            if DEBUG:
                traceback.print_exc()

with

Traceback (most recent call last):
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\ui.py", line 703, in initialize_plugins
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\ui.py", line 61, in load_plugin
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\zipplugin.py", line 203, in load
File "importlib\__init__.py", line 37, in import_module
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\zipplugin.py", line 185, in load_module
File "calibre_plugins.markdown_output.__init__", line 3, in <module>
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\zipplugin.py", line 185, in load_module
File "calibre_plugins.markdown_output.markdown_outp ut", line 3, in <module>
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\customize\zipplugin.py", line 185, in load_module
File "calibre_plugins.markdown_output.ui", line 1, in <module>
File "D:\workplace\program\open-sourse\calibre-src\src\calibre\gui2\convert\txt_output.py", line 10, in <module>
ImportError: cannot import name Widget

[kovidgoyal]

Move your import
at calibre_plugins.markdown_output.ui", line 1, in <module>

to inside the function where it is actually used.

[The_book]

Originally Posted by kovidgoyal

Move your import
at calibre_plugins.markdown_output.ui", line 1, in <module>

to inside the function where it is actually used.

Thanks. Now it works well. I update it.

[The_book]

By adding

class TXTUIForm(Ui_Form):
    def setupUi(self, Form):
        super(TXTUIForm, self).setupUi(Form)
        def delete(layout, widget):
            layout.removeWidget(widget)
            widget.deleteLater()
        delete(self.gridLayout,self.label_4)
        delete(self.gridLayout,self.opt_txt_output_formatting)
        delete(self.verticalLayout,self.opt_keep_color)

I remove formatting and keep text color in GUI