How to run precached images

[og900aero]

My problem is that when I want to look at new pictures, the drawing of the preview picture is a bit lengthy due to the code below:

image/*)
      orientation="$(identify -format '%[EXIF:Orientation]\n' -- "$file")"
      if [ -n "$orientation" ] && [ "$orientation" != 1 ]; then
        cache="$(hash "$file").jpg"
        cache "$cache" "$@"
        convert -- "$file" -auto-orient "$cache"
        draw "$cache" "$@"
      else
        draw "$file" "$@"
      fi
      ;;

What slows it down is part of the orientation instruction. I don't want to take it out, because it's a useful control function anyway.
Does anyone know of a method or script that, if I enter a path, caches the images for lf on the specified path?
I was thinking of something like, for example, using find to search for all the images, and for each result, it would somehow run the cache mechanism:
find /path/to/pictures -type f -name "*.jpg" -exec ???

[DusanLesan]

You mean something like this? https://github.com/LukeSmithxyz/voidrice/blob/master/.config/lf/scope

[og900aero]

Unfortunately, this doesn't work properly for me:

1. that line still doesn't work in on-cd
2. it doesn't clear the preview image if I go to an item that doesn't have a preview because it's not configured or a directory
3. it shows that it is not cached for all of them, even though I manually started caching on one of the folders

If I modify SetCache function to:

setCache() {
	cache="$(readlink -f "$1" | sha256sum)"
	cache="$XDG_CACHE_HOME/lf/thumb.${cache%% *}.jpg"
	notify-send "$1"
			notify-send "$cache"
}

Even then, I can see that the cache file generated by the previewer received a different value than the one generated by the find... line in lfrc.

[DusanLesan]

that line still doesn't work in on-cd

Did you try taking commands apart?
Try this change and go to directory with images:

cmd on-cd &{{
	[ "$PWD" = "$XDG_CACHE_HOME/lf" ] && exit 0
	mkdir -p "$XDG_CACHE_HOME/lf"
	find "$PWD" -maxdepth 1 -type f \( -iname \*.jpg -o -iname \*.jpeg -o -iname \*.png \) |
		parallel 'cache="$XDG_CACHE_HOME/lf/thumb.$(sha256sum <<< "{}" | cut -d " " -f 1).jpg"; notify-send "Cache:" ">$cache<"'
}}

and it should display a notification for each jpeg or png. If that is not ok, move to previous peace of command and see if it is executed.

it doesn't clear the preview image if I go to an item that doesn't have a preview because it's not configured or a directory

Not sure if your cleaner script is working, I did not notice any issues

it shows that it is not cached for all of them, even though I manually started caching on one of the folders

If on-cd (make sure it is called exactly like that) is not working for you, then the value you hash is not the same. Make sure it is the same with notify-send or logging it to a file.

cmd on-cd &{{
	[ "$PWD" = "$XDG_CACHE_HOME/lf" ] && exit 0
	mkdir -p "$XDG_CACHE_HOME/lf"
	find "$PWD" -maxdepth 1 -type f \( -iname \*.jpg -o -iname \*.jpeg -o -iname \*.png \) |
		parallel 'notify-send "File name to cache:" ">{}<"'
}}

setCache() {
	notify-send "$1"
	notify-send "$(readlink -f "$1")"
}

Compare what you get for some file an make sure they match exactly

Did you try minimal setup like mine? So nothing else in these files. Same content like I had.

[og900aero]

I try minimal setup. The only settings have in lfrc:

set shell sh
set previewer ~/.config/lf/previewer
set cleaner ~/.config/lf/cleaner
set shellopts '-eu'
set ifs "\n"

cmd on-cd &{{
	[ "$PWD" = "$XDG_CACHE_HOME/lf" ] && exit 0
	mkdir -p "$XDG_CACHE_HOME/lf"
	find "$PWD" -maxdepth 1 -type f \( -iname \*.jpg -o -iname \*.jpeg -o -iname \*.png \) |
		parallel 'cache="$XDG_CACHE_HOME/lf/thumb.$(sha256sum <<< "{}" | cut -d " " -f 1).jpg"; [ -f "$cache" ] || convert -- "{}" -auto-orient "$cache"'
}}

Previewer file:

#!/bin/sh

image() {
	if [ -n "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ]; then
		printf '{"action": "add", "identifier": "PREVIEW", "x": "%s", "y": "%s", "width": "%s", "height": "%s", "scaler": "contain", "path": "%s"}\n' "$4" "$5" "$(($2-1))" "$(($3-1))" "$1" > "$FIFO_UEBERZUG"
		exit 1
	else
		chafa "$1" -s "$4x"
	fi
}

setCache() {
	cache="$(readlink -f "$1" | sha256sum)"
	cache="$XDG_CACHE_HOME/lf/thumb.${cache%% *}.jpg"
	notify-send "$1"
			notify-send "$cache"
}

case "$(file --dereference --brief --mime-type -- "$1")" in
	image/*)
		setCache "$1"
		if [ ! -f "${cache}" ]; then
			cache="$1"
			notify-send "Cache not found"
		fi
		image "${cache}" "$2" "$3" "$4" "$5" ;;
	*)
		bat -p --color=always "$1" --theme 'Visual Studio Dark+' --tabs 2 ;;
esac
exit 0

But the hash generated by lfrc (manually run in example directory) and previewer is still different.

When on-cd command contains only the following, then run properly

cmd on-cd &{{
	[ "$PWD" = "$XDG_CACHE_HOME/lf" ] && exit 0
	mkdir -p "$XDG_CACHE_HOME/lf"
	find "$PWD" -maxdepth 1 -type f \( -iname \*.jpg -o -iname \*.jpeg -o -iname \*.png \) |
		parallel 'notify-send "File name to cache:" ">{}<"'
}}

[DusanLesan]

Is the notification from on-cd the same for some file as when you preview it and print value to be hashed? For hash to be different, the value that is hashed must be different. Either path is included in one and not other, or extension is not added properly, or your shell handles preview code differently (#!/bin/sh for me is zsh). Make sure they are the same before caching in both places.

[og900aero]

Thanks for the help, but I'd rather give up on this. It's not worth as much as it is worth.
Thanks again for everything.