#!/bin/bash

REP_CC=cc
REP_CXX=c++
REP_INCLUDE='-I$(HOME)/projects/include -I/usr/include'
REP_LIBRARIES=
REP_TARGET=target

SMAKE_DIR=~/dev/bash/smake/etc/smake
ENV_FILE=$SMAKE_DIR/env.smk
BUILD_FILE=$SMAKE_DIR/build.smk
RULES_FILE=$SMAKE_DIR/rules.smk

# Debug
DEBUG=1

# Parameters processing
TEMP=`getopt -o c:x:i:l:t: --long cc:,cxx:,include:,libraries:,target: -- "$@"`
eval set -- "$TEMP"

while true ; do
	case "$1" in
		-c|--cc) REP_CC=$2 ; echo "CC=$REP_CC" ; shift 2 ;;
		-x|--cxx) REP_CXX=$2 ; echo "CXX=$REP_CXX" ; shift 2 ;;
		-i|--include) REP_INCLUDE=$2 ; echo "INCLUDE=$REP_INCLUDE"; shift 2 ;;
		-l|--libraries) REP_LIBRARIES=$2 ; echo "LIBRARIES=$REP_LIBRARIES"; shift 2 ;;
		-t|--target) REP_TARGET=$2 ; echo "TARGET=$REP_TARGET"; shift 2 ;;
		--) shift ; break ;;
		*) echo "Internal error!" ; exit 1 ;;
	esac
done

# --- Environment ---
sed "s~REP_CC~$REP_CC~ ; s~REP_CXX~$REP_CXX~ ; \
     s~REP_LIBRARIES~$REP_LIBRARIES~ ; s~REP_TARGET~$REP_TARGET~" $ENV_FILE > Makefile

# INCLUDE0, INCLUDE1, INCLUDE2, ...
REP_INCLUDE=`echo $REP_INCLUDE | sed "s~-I~~g ; s~\\$(HOME)~${HOME}~"`

i=1
for d in $REP_INCLUDE; do
	echo "INCLUDE$i=$d" >> Makefile
	i=$((i+1))
done

for d in $REP_INCLUDE; do
	echo -n ' $(INCLUDE'$j')' >> Makefile
done
echo >> Makefile

echo >> Makefile

# --- Build ---
cat $BUILD_FILE >> Makefile

echo >> Makefile

# --- Rules ---
cat $RULES_FILE >> Makefile

all_dep_lst=`grep ^\#include\ \" $REP_TARGET.c | sed 's~[^"]*"\([^"]*\)"~\1~' | sort -u`

while [[ "$all_dep_lst" != "$old_all_dep_lst" ]]; do
	old_all_dep_lst=$all_dep_lst
	for f in $all_dep_lst; do
		F=""
		for d in . $REP_INCLUDE; do
			#echo "$d/$f" # | sed "s~^${HOME}~$\(HOME\)~"
			if [ -f "$d/$f" ]; then
				F="$d/$f"
				break
			fi
		done
		if [ "$F" == "" ]; then
			echo "file \"$f\" not found"
			exit -1
		fi
		#echo "F=$F"
		all_dep_lst="$all_dep_lst "`grep ^\#include\ \" $F | sed 's~[^"]*"\([^"]*\)"~\1~'`
		all_dep_lst=`echo $all_dep_lst | sed 's~ ~\n~g' | sort -u`
	done
done

echo "all_dep_lst=$all_dep_lst"