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#!/usr/bin/env bash
set -euo pipefail
# @describe Remove empty values from JSON
# @meta require-tools jq
# @arg file=- <PATH> input file name
# @flag -n --remove-nulls remove nulls
# @flag -N --keep-nulls keep nulls
# @flag -e --remove-empty-strings remove empty strings
# @flag -E --keep-empty-strings keep empty strings
# @flag -b --remove-blank-strings remove blank strings
# @flag -B --keep-blank-strings keep blank strings
# @flag -a --remove-empty-arrays remove empty arrays
# @flag -A --keep-empty-arrays keep empty arrays
# @flag -o --remove-empty-objects remove empty objects
# @flag -O --keep-empty-objects keep empty objects
# @flag --keep-all keep all
# @flag --print-filter print used JQ filter
join_by() {
local delimiter="$1"
local result
shift
result=$(printf "%s$delimiter" "$@")
result=${result%"$delimiter"}
echo "$result"
}
print_jq_filter() {
local filters
[ "${argc_keep_nulls:-0}" = 0 ] && filters+=(". == null")
[ "${argc_keep_empty_strings:-0}" = 0 ] && filters+=('. == ""')
[ "${argc_keep_blank_strings:-0}" = 0 ] && filters+=('(. | tostring | test("^[[:space:]]*$"))')
[ "${argc_keep_empty_arrays:-0}" = 0 ] && filters+=('. == []')
[ "${argc_keep_empty_objects:-0}" = 0 ] && filters+=('. == {}')
echo "del(..|select($(join_by " or " "${filters[@]}")))"
}
main() {
local jq_filter
jq_filter=$(print_jq_filter)
[ "${argc_print_filter:-}" = 1 ] && echo "JQ Filter: $jq_filter" >&2
jq "$jq_filter" "${argc_file?}"
}
eval "$(argc --argc-eval "$0" "$@")"
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