A bash script that counts go function and method lines of code (including whitespace and comments)

count_functions_loc.sh

#!/bin/bash
#
# Usage: bash count_functions_loc.sh some/directory

set -euo pipefail

main() {
  for f in $(find $1 -name '*.go' -not -name 'test_*.go'); do
    count_funcs < "$f" | awk "{ print \"$f\", \$1, \$2 }"
  done
}

count_funcs() {
  ruby -e 'STDIN.read.scan(/(^func\s*(?:\([^)]+\))?\s*(\w+)\(.+?^})/m) {|whole, name| puts("#{name}\t#{whole.scan(/\n/).length}")}; nil'
}

main $@