How set JUST_CHOOSER for preview syntax highlighting?

[paidhi]

I would like to pimp just --choose to get syntax highlighting in the preview.

fzf is installed on my system but I can't figure out how to set the JUST_CHOOSER environment variable in a way that a tool like bat or highlight is used in conjunction with fzf to show syntax coloring.

My configuration of bat supports Justfile syntax.
If I pipe to bat or highlight manually it works. E.g.:

just --show myrecipe | bat -l just -pp

just --show myrecipe | highlight --out-format=ansi --syntax=makefile

Has anyone ever successfully done this and could give me a hint how to set JUST_CHOOSER?

[laniakea64]

What exact values of JUST_CHOOSER have you tried?
Are you invoking bat with --color=always option?

[jwdeane]

As noted above, the following works for me:

just --choose --chooser "fzf --multi --preview 'just --show {} | bat --color=always -l just -pp'"

My preference is to use a custom choose recipe. This gives me the benefit of including submodules, and allowing all recipes to be previewed/selected, not just those without arguments.

_choose:
    @just --summary | \
        tr ' ' '\n' | \
        sort -r | \
        fzf --multi --preview 'just --show {} | bat --color=always -l just -pp' | \
        xargs just