jazz : list paths from a json input, fuzzy search a node, get its content ; useful with large payloads

jazz.sh

#!/usr/bin/env bash
# Tested with jq 1.6 & fzf 0.42.0
# Inspired by https://github.com/reegnz/jq-zsh-plugin
# Call with `jazz <big_file_with_many_paths>.json` or `<command producing a valid json> | jazz`
# End command with `... | pbcopy` or `... > output.json` to save selection

input=$1

TMP_DIR=$(mktemp -d /tmp/jazz_XXX)
chmod 700 "$TMP_DIR"
if [[ -z $1 ]] || [[ $1 == "-" ]]; then
                input="$TMP_DIR/input"
                cat /dev/stdin > "$TMP_DIR/input"
fi

trap 'rm -rf "$TMP_DIR"' EXIT
echo "[]" > "$TMP_DIR/root"
echo >&2 -n "Generating iterable paths..."
jq -c "paths(iterables)" "$input" > "$TMP_DIR"/iterables
echo >&2 -ne "\r\033[K" # Erase STDERR line
echo >&2 -n "Generating scalar paths..."
jq -c "paths(scalars)" "$input" > "$TMP_DIR"/scalars
echo >&2 -ne "\r\033[K"

# Inspired by this snippet from @dakusui for jq-front https://github.com/jqlang/jq/issues/1949#issuecomment-569278958
PATH_CONVERTER='if length == 0 then "."
else
        reduce .[] as $segment (
          "";
          . + ($segment |if type == "string" then "." + . else "[\(.)]" end)
        )
end'
PATH_CMD="printf %s {} | jq -cr '$PATH_CONVERTER'"

PREVIEW_CMD="cat {+f}" # print content of selected line to escape quotes
PREVIEW_CMD="$PREVIEW_CMD | awk '{print \"getpath(\"\$1\")\"}'" # interpolate quoted path in `getpath()`
PREVIEW_CMD="$PREVIEW_CMD | xargs -0 -I path jq --color-output path $input" # -0 to escape quotes

cat "$TMP_DIR"/{root,iterables,scalars} | fzf \
                --height='50%' \
                --preview-window='right:50%' \
                --preview "$PATH_CMD ; $PREVIEW_CMD" \
                --tiebreak=length \
                --preview-label="Enter to output node, Ctrl-l to output path, Ctrl-c to exit" \
                --bind "enter:become($PREVIEW_CMD)" \
                --bind "ctrl-l:become($PATH_CMD)"

rm -rf "$TMP_DIR"