simple sourcecode preprocessor-file-import-include bundler using awk

bundle.sh

#!/bin/sh
awk '/^#include *".*"$/ {      
  i = index($0, "\"");         
  file = substr($0, i + 1, length() - i - 1); 
  while ((getline < file) == 1) print;  
  close(file);                 
  next; 
} 1' myfile.txt > myfile.bundled.txt

foo.txt

other content

myfile.txt

hello
#import "foo.txt"