script to run a command and preview the results using fzf

preview.zsh

#!/usr/bin/env zsh
# Opens the FZF preview in full-screen mode, and re-runs a command with any
# given arguments while allowing paging.
#
# Arguments:
#     $1 = command to preview. 
#
# Example:
#     preview nix-search
#
# Notes:
#     - **Only** use this with commands that are non-destructive.
#     - Won't run the command until you give it some input.
#
FZF_DEFAULT_COMMAND='echo ""' \
  fzf \
  --phony \
  --disabled \
  --print-query \
  --preview "echo {q} | xargs $1" \
  --preview-window=down,wrap,99%