(Yet another) interactive jq, but it's a bash script using fzf

ijq.sh

#!/usr/bin/env bash

set -euo pipefail

if [ "${1:-}" = "--help" ]; then
  cat << EOF
Usage: ijq [filename]

    A wrapper around jq that uses fzf to interactively build jq filters.

Examples:

    ijq [filename]
    cat file.json | ijq
    curl -s https://api.github.com/users/thomascountz | ijq
EOF
  exit 0
fi

# Create a temporary file
tempfile=$(mktemp)

# Export the tempfile variable so it can be accessed within the fzf context
export tempfile

# Always clean up the temp file on exit, even if script is interrupted
trap 'rm -f "$tempfile"' EXIT

# Read JSON input into the temp file. If a filename is provided as an
#  argument, read from the file. Otherwise, read from stdin.

if [ -n "${1:-}" ]; then
  cat "$1" > "$tempfile"
else
  cat > "$tempfile"
fi

# Set the commands to be bound enter, ctrl-y, and ctrl-f.
fzf_enter_bind_command='enter:become(jq {q} $tempfile)'
fzf_ctrl_y_bind_command='ctrl-y:execute-silent(jq {q} $tempfile | pbcopy)'
fzf_ctrl_f_bind_command='ctrl-f:execute-silent(echo {q} | pbcopy)'

# Start fzf with an empty candidate list, and reference the temp file in preview
# window so you can type jq filters and see the live preview. Press Enter to output
# the filtered JSON to STDOUT, or use ctrl-y and ctrl-f to copy to your clipboard.
echo '' | fzf --print-query \
  --query '.' \
  --prompt 'jq filter: ' \
  --bind "$fzf_enter_bind_command" \
  --bind "$fzf_ctrl_y_bind_command" \
  --bind "$fzf_ctrl_f_bind_command" \
  --preview "jq {q} \"$tempfile\"" \
  --preview-window=top:90%:wrap \
  --header=$'ctrl+y : copy JSON\nctrl+f : copy filter\nenter  : output\nesc    : exit' \
  --header-border \
  --header-label="INSTRUCTIONS" \
  --border