Cannot work for less?

[Freed-Wu]

$ zstyle ':fzf-tab:complete:*' fzf-preview 'echo 1 && less $realpath'
$ echo $LESSOPEN
|/usr/bin/lesspipe.sh %s
$ pacman -Qi lesspipe | rg Version
Version         : 2.07-1
$ pacman -Qi less | rg Version
Version         : 1:633-1

less /mnt/flicker_2W_images.7z:

less /mnt/<TAB> to call fzf-tab:

Why it only 1 not the result of less?

[xfzv]

@Freed-Wu

I'm having the same issue. I've been trying to fix this for several hours now, to no avail.

Previews with file contents as per described in the wiki was working fine for me before, but now they're broken.

I'm using lesspipe 2.07-1 on Arch Linux and 2.08 on Gentoo. I tried to downgrade to version 2.02 but it doesn't make any difference.

Other previews code snippets from the wiki work fine (kill ; systemd units ; tealdeer ; commands...)

I'm also using

zstyle ':fzf-tab:complete:cd:*' fzf-preview 'lsd -al --color=always --icon=always --tree $realpath'

which still works for cd.

But for anything else like ls less ; cat ; cp etc., all I get is an empty preview pane, or in some directories a random character like 0 or G. I have no idea where it's coming from.

My lessfilter.sh script works as expected. Just like you,

less "$FILE"

does exactly what it's supposed to do. Only the preview with fzf-tab is broken.

Have you ever found a solution?

@Aloxaf any idea?

---

For reference

• My lessfilter.sh:

#! /usr/bin/env bash

check_deps() { hash "$1" 2>/dev/null; }

MIME="$(file -bL --mime-type "$1")"
CATEGORY="${MIME%%/*}"

if [[ -d "$1" ]]; then
	check_deps exa && exa -a --color=always -l -g --git --group-directories-first --icons "$1"
	check_deps lsd && lsd -al --color=always --icon=always "$1"
elif [[ "$CATEGORY" == "image" ]]; then
	check_deps chafa && chafa -f symbols "$1"
	check_deps exiftool && exiftool "$1"
elif [[ "$CATEGORY" == "text" ]]; then
	check_deps bat && bat --color=always --line-range :200 "$1"
elif [[ "$CATEGORY" == "video" ]]; then
	check_deps mediainfo && mediainfo "$1"
else
	lesspipe.sh "$1" | bat --color=always --line-range :200
fi

❯ echo $LESSOPEN
# It's available in my $PATH
|lessfilter.sh %s

❯ less --version
less 633 (PCRE2 regular expressions)

• My fzf-tab relevant zstyle options:

# cd
[[ -v commands[exa] ]] && zstyle ':fzf-tab:complete:cd:*' fzf-preview 'exa --color=always -l -a -g --git --group-directories-first --icons $realpath'
[[ -v commands[lsd] ]] && zstyle ':fzf-tab:complete:cd:*' fzf-preview 'lsd -al --color=always --icon=always --tree $realpath'

# Environment variables
zstyle ':fzf-tab:complete:(-command-|-parameter-|-brace-parameter-|export|unset|expand):*' fzf-preview 'echo ${(P)word}'

# kill
zstyle ':completion:*:*:*:*:processes' command 'ps -u $USER -o pid,user,comm -w -w'
zstyle ':fzf-tab:complete:(kill|ps):argument-rest' fzf-preview '[[ $group == "[process ID]" ]] && ps --pid=$word -o cmd --no-headers -w -w'
zstyle ':fzf-tab:complete:(kill|ps):argument-rest' fzf-flags --preview-window=down:3:wrap

# systemd units status
zstyle ':fzf-tab:complete:systemctl-*:*' fzf-preview 'SYSTEMD_COLORS=1 systemctl status $word'

# Tealdeer
zstyle ':fzf-tab:complete:tldr:argument-1' fzf-preview 'tldr --color always $word'

# Previews with lessfilter.sh
zstyle ':fzf-tab:complete:*:*' fzf-preview 'less ${(Q)realpath}'
zstyle ':fzf-tab:complete:*:*' fzf-flags --height=100% --preview-window=right:wrap

# Switch group with ',' and '.'
zstyle ':fzf-tab:*' switch-group ',' '.'

# Commands
zstyle ':fzf-tab:complete:-command-:*' fzf-preview \
    '(out=$(tldr --color always "$word") 2>/dev/null && echo $out) || (out=$(MANWIDTH=$FZF_PREVIEW_COLUMNS man "$word" | bat --color=always -plman) 2>/dev/null && echo $out) || (out=$(which "$word") && echo $out) || echo "${(P)word}"'

# Disable previews for commands options and arguments
zstyle ':fzf-tab:complete:*:options' fzf-preview
zstyle ':fzf-tab:complete:*:argument-1' fzf-preview
zstyle ':fzf-tab:complete:chezmoi:*' fzf-preview
zstyle ':fzf-tab:complete:kitty:*' fzf-preview
zstyle ':fzf-tab:complete:rclone:*' fzf-preview

# Git
zstyle ':fzf-tab:complete:git-(add|diff|restore):*' fzf-preview \
    'git diff $word | delta'
zstyle ':fzf-tab:complete:git-log:*' fzf-preview \
    'git log --color=always $word'
zstyle ':fzf-tab:complete:git-help:*' fzf-preview \
    'git help $word | bat -p -l man --color=always'
zstyle ':fzf-tab:complete:git-show:*' fzf-preview \
    'case "$group" in
      "commit tag") git show --color=always $word ;;
	    *) git show --color=always $word | delta ;;
esac'
zstyle ':fzf-tab:complete:git-checkout:*' fzf-preview \
    'case "$group" in
      "modified file") git diff $word | delta ;;
      "recent commit object name") git show --color=always $word | delta ;;
      *) git log --color=always $word ;;
esac'