#!/bin/sh

CPROTO=cproto 
CPROTO_FLAGS="-I. -I./include -I./include/zori -I./include/tr -D CPROTO"
c_files=$(find src -iname "*.c" | tr "\n" ' ')

for each in $c_files
do
  dir=$(dirname "$each")
  cfile=$(basename "$each")
  hdir=include${dir#src}
  bfile="${cfile%.c}"
  haid="${bfile}_proto.h"
  guard="${bfile}_proto_included"
  hfile="$hdir/$haid"
  # printf "%s: %s->%s\n" "$each" "$dir" "$hfile $guard"

  if grep -q '@generate_cproto@' $each
  then 
    mkdir -p "$hdir"
    temp=$(mktemp)
    if [ -e "$hfile" ]
    then
      if [ "$each" -ot "$hfile" ]
      then
        printf "Skipping file: $hfile: up to date.\n" 
        continue
      fi
    else  
      # create file if it doesn't exist to avoid chicken and egg problems. 
      touch "$hfile" 
    fi
    printf "Generating $hfile from $each. ${CPROTO_PATH} \n"

    printf "/* This file was generated by runcprotoall */\n" > "$temp"
    printf "\n#ifndef CPROTO /* Needed to protect cproto from itself. */\n#ifndef ${guard}\n" >> "$temp"
    if cproto $CPROTO_FLAGS -I"$hdir" "$each" >> "$temp" 
    then
      printf "\n#endif /* ${guard} */ \n#endif /* CPROTO */" >> "$temp"
      mv -f "$temp" "$hfile"
      git add "$hfile" 
    else
      printf "cproto failed\n"
      exit 1
    fi
  fi
done