add jq-cleanup script for JSON cleanup

1 files changed, 50 insertions, 0 deletions

diff --git a/jq-cleanup b/jq-cleanup
new file mode 100755
index 0000000..119bf1e
--- /dev/null
+++ b/jq-cleanup
@@ -0,0 +1,50 @@
+#!/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 "$0" "$@")"