Expose states to the subprocesses via environment variables about fzf HOT 1 CLOSED

I'd like to expose more information to the subprocesses to facilitate the development of sophisticated applications.

pro (environment variables)

• can take advantage of Parameter Expansion

#!/usr/bin/env bash
set -o allexport -o errexit -o nounset -o pipefail
# https://www.gnu.org/software/bash/manual/bash.html#The-Set-Builtin

SHELL=$(which bash)
show_port() {
	echo "${FZF_PORT?:"no port"}"
}

fzf --bind 'start:change-preview:show_port'

• can easily see all the available variables and their corresponding values

: | fzf --listen --preview-window 90% --preview 'typeset | grep FZF'

cons (environment variables)

• Could it be confusing to have an $FZF_ACTION environment variable? It might be mistaken for the $FZF_DEFAULT_COMMAND, or some users might assign the $FZF_PROMPT and wonder why nothing changes on their prompt when they start up fzf.

So, $FZF_TOTAL_COUNT or {fzf:total-count}?

I'm indifferent and can live with either option. If you need a short version for the total placeholder, parallel¹ uses {##}.

# {#} the sequence number of the job
# {##} is the total number of jobs
parallel --plus echo Job {#} of {##} ::: {1..5}
# Job 1 of 5
# Job 2 of 5
# Job 3 of 5
# Job 4 of 5
# Job 5 of 5

I'd like to expose more information to the subprocesses to facilitate the development of sophisticated applications.

Thank you.

from fzf.