Can I set a Style Tweak setting by directory ?

[chatteleyn]

I would like to edit directory_defaults.lua to set the setting paragraph_web_browser_style to True to have a specific paragraph style for only one directory. I copied the value that I found in a metadata_default.lua file but I can't make it work and I don't know if this is because my file is wrong or because this is not currently supported by Koreader.
Here is the content of directory_defaults.lua

return {
    ["/mnt/onboard/Articles"] = {
        style_tweaks = {
            paragraph_web_browser_style = true,
        },
    },
}

Do you find an error in the file content or do you know if style tweak by directory is not supported in Koreader ?

[poire-z]

No real idea (not using that plugin).
Looks like there is no filtering of settings in the plugin https://github.com/koreader/koreader/blob/master/plugins/docsettingtweak.koplugin/main.lua , so everything should just be copied into the empty doc_settings of a newly opened document.
And this is how I get it in my metadata.epub.lua when I select that tweak:

    ["style_tweaks"] = {
        ["paragraph_web_browser_style"] = true,
    },

May be try using that format ["stuff"] (although I don't know why yours would not be supported).

Also, once opened, look in the book.sdr/metadata.epub.lua if that setting is copied.

[chatteleyn]

I've edited my initial directory_defaults.lua file with the format you suggested but it still gives me no result. When I check the content of a newly opened book metadata.epub.lua, the style tweak is not copied.

I also tried to simply add a classic setting like ["copt_font_size"] = 34 as it is in the documentation examples but even this simple setting is not applied to newly opened books. I suppose my issue is not directly linked to style tweaks and that the plugin is not correctly working on my ereader, or that I am doing something wrong somewhere else.

[EastEriq]

I'm also affected by this. In my case I'd like that all the epubs downloaded from a certain news feed receive the style tweak appropriate for them. I have also set, as @chatteleyn, my lines in directory_defaults.lua; they look as valid lua, but when the epub is opened they are not applied, and are not included in metadata.epub.lua in the sdr dir. In my case the customization I attemp in directory_defaults.lua is

[[
    ["/ext1/news/שיחה%20מקומית"] = {
        ["inverse_reading_order"] = true,
        ["font_face"] = "Shofar",
        ["style_tweaks"] = { ["mekomit.css"] = true },
    }
]]

Shall we open a bug issue on this?

[EastEriq]

(even removing [[ ]], after #11539 (comment) did not help)

[poire-z]

Does it fail just for style_tweaks ? If you set any other font related setting, it works ?

[EastEriq]

To remove the doubt about that, and also about spaces and nonASCII chars in the path and in the filename, I've tried now

    ["/ext1/Ebookgratuits"] = {
        ["font_size"] = 60,
        ["line_space_percent"] = 130,
    },

which didn't seem to work either. I've also tried to quit KR and reopen the book. (when are changes to directory_default supposed to work btw? immediately? After the book is closed and reopened? at the next restart of KR? If metadata.lua is cleared?)

In the issues I have found this confirmation that at least for someone, something worked in 2024. So maybe a regression, or a platform dependence?

[poire-z]

@mergen3107 @yparitcher : does this plugin still work for you these days ?
(If not, in advance also pinging @hius07 , in case some docsettings lifecycle possible changes made over the last years have this plugin don't inject these where it should.)

[chatteleyn]

I personally did what I wanted to do with koreader profiles, seems to be easier to set and more powerful anyway

[yparitcher]

Works for me running version 2026-03-13

[yparitcher]

style tweaks and hebrew in keys both work

[hius07]

Shouldn't the folder with the book be under the Home folder?

[EastEriq]

How can I help debugging then?

I'm on 2026-03-13 as well.

Shouldn't the folder with the book be under the Home folder?

This is a pocketbook PB631 (FW 5.x). /ext1 is the base dir. ETA: it's /mnt/ext1 in reality. But still can't make it work.

[hius07]

I mean KOReader Home folder.
Can you set /ext1 as Home folder (long press on it) and try.
UPD: while in /ext1, press the Plus (upper right) and Set as Home folder.

[EastEriq]

If you mean in the file browser, I did it now. I don't see that it changes things. The style tweak is not applied on epubs in the intended dir, neither previously opened ones, nor never opened ones.

[hius07]

I think something wrong with paths.
Can you replace \koreader\plugins\docsettingtweak.koplugin\main.lua with the attached file (remove txt extension) and open a new file. (If the file has been opened previously, long-press on it and choose Reset). Then share the crash.log.
main.lua.txt

[EastEriq]

Here you go. On one account I must correct myself, the paths have to be really to be /mnt/ext1/... and not just /ext1/..., I realized later on. But even having corrected it, it doesn't seem to work for me. Is it perhaps

ERROR An error occurred while executing handler pocketbooksync:onFlushSettings:
 plugins/pocketbooksync.koplugin/main.lua:35: attempt to index field 'view' (a nil value)

or is that a red herring about another plugin (pocketbooksync)?
crash.log

[hius07]

You have set two folders with special settings:
/mnt/ext1/Ebookgratuits
/mnt/ext1/news/שיחה%20מקומית

But the book is not in any of these folders or their subfolders.

[EastEriq]

I don't understand.
/mnt/ext1/news/שיחה מקומית/26-04-23_11-34_החשבון שאחרי_ הלקחים של מדינות המפרץ מהמלחמה עם איראן.epub
is inside

/mnt/ext1/news/שיחה%20מקומית

(mind bidi display)
Later on I can see to get crash.log for something within /mnt/ext1/Ebookgratuits, which I confirm doesn't work for me either.

[hius07]

mind bidi display

Maybe that's the reason. The plugin just compares the strings, not bidi paths:

koreader/plugins/docsettingtweak.koplugin/main.lua

Lines 95 to 100 in 41c9e02

	local base = G_reader_settings:readSetting("home_dir") or filemanagerutil.getDefaultDir()
	local absolute_path = FFIUtil.realpath(document.file)
	local directory = FFIUtil.dirname(absolute_path)
	-- check if folder matches our defaults to override
	while directory:sub(1, #base) == base do
	if directory_defaults:has(directory) then

[EastEriq]

Aren't strings compared as UTF? bidi is only presentational here.
Anyway that should not be an issue with /mnt/ext1/Ebookgratuits, I'll substantiate that later.

[EastEriq]

Ok, I think I've sorted that out, once I looked with a bit more attention in the metadata.epub.lua files of the sdr dir. Feel a bit stupid about. So:

• ["/ext1/news/שיחה%20מקומית"] --> ["/ext1/news/שיחה מקומית"] (inside the string the space doesn't need to be represented as html entity, I don't know where I got that from);
• ["copt-font_size"] --> ["copt_font_size"] (my typo probably, it was just POC anyway)

Sorry for the noise then, and thanks for the feedback...