Create loading file from multiple php class files under lib directory.

make_init.php.bash

#!/bin/bash

THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-${(%):-%N}}")"; pwd)"
files=("$(find ${THIS_DIR-}/lib -type f)")
class_lines=("$(printf '%s\n' "${files[@]}" \
  | xargs -n 1 grep -m 1 -E '^(abstract )?class' \
  | sed -r 's/^.*class ([A-Za-z]+)/\1/')")
class_names=("$(printf '%s\n' "${class_lines[@]}" | awk '{print $1}')")

remove_buildin_classes () {
  sed \
    -e 's/ extends Exception//;' \
    -e 's/ implements ArrayAccess//'
}

breath_first_order () {
  sed 's/class //;s/ extends/:/;s/$/;@echo $@/' \
    | sed '/:/!{s/;/:;/}' \
    | make -f- $* \
    | grep -v make
}

echo "<?php"
printf '%s\n' "${class_lines[@]}" \
  | remove_buildin_classes \
  | breath_first_order "${class_names[@]}" \
  | \
  while read pattern ; do
      printf '%s\n' "${files[@]}" \
        | grep "/${pattern}.php$" \
        | sed "s|${THIS_DIR-}||" \
        | sed "s|.*|require(dirname(__FILE__) . '&');|"
  done