#!/bin/sh

###################################################################
# Wrapper around c compilers
# Makes compiling and writing c easier
# for people who write small programs (unfortunately not everyone).
# Mostly made for personal workflow.
# Inspired by the Go compiler.
###################################################################

if [ "$1" = "" ]
then
	echo "$0 [command] (file|foldername)" | sed "s|/.*/||g"
	echo
	echo "commands:"
	echo
	echo "	build	compiles all c files in a directory"
	echo "	mk      compiles a single file using tcc"
	echo "	run	compiles and runs the c file pointed to"
	echo "	clean	removes the binary named after the directory"
	echo

	exit
fi

whatdo="$1"
file="$2" # optional

CC="clang"
while getopts ":c:" c; do
case "$c" in
	c) CC="$OPTARG"; whatdo="$3"; file="$4"
	;;
esac
done
# add all the link options you can think of. 
translate="s|math.h|-lm|; s|xcb/xcb.h|-lxcb|; s|xcb/xcb_util.h|-lxcb-util|;"

stdgone="s/assert.h|ctype.h|dirent.h|errno.h|fcntl.h|inttypes.h|limits.h|locale.h|setjmp.h|signal.h|stdarg.h|stdio.h|string.h|stdlib.h|time.h|unistd.h|sys\/types.h|sys\/wait.h|iostream|vector|string|long|iomanip//g;"

cfiletext="^//cfiles: " # uses grep regex


flags() {
	incflangs=""
	cflags=""
	cfiles="$(grep -h "$cfiletext" *.c | cut -b 11-)"
	include="$(grep -h "^#include <" *.c | uniq | sed "s/#include <//g;s/>//g;$translate;$stdgone")"

	echo $cfiles $cflags $include $incflags
}

singleflags() {
	incflangs=""
	cflags=""
	cfiles="$(grep "$cfiletext" "$file" | cut -c 11-)"
	include="$(grep -h "^#include <" $file $cfiles | uniq | sed -E "s/#include <//g;s/>//g;$translate;$stdgone")"
	
	echo $cfiles $cflags $include $incflags
}

build() {
	[ "$file" != "" ] && [ -d "$file" ] && cd "$file" 
	arecfiles="$(ls -l | grep "\.c")"
	[ "$arecfiles" = "" ] && echo "not a buildable directory" && exit
	binname="$(pwd | sed "s|/.*/||g")" # The name of the working directory
	allflags="$(flags)"
	$CC $allflags -o "$binname" *.c
}



mak() {
	[ ! -e "$file" ] || [ -d "$file" ] && echo "give one existing file name" && exit
	filebase="${file%.*}"
	allflags="$(singleflags)"
	$CC -o "$filebase" $allflags "$file"
}


clean() {
	[ "$file" != "" ] && [ -d "$file" ] && cd "$file" 
	binname="$(pwd | sed "s|/.*/||g")"
	[ -f "$binname" ] && rm "$binname"
}

case "$whatdo" in
	"build") build ;;
	"debug") debugbuild ;;
	"mk") mak ;;
	"run") mak && "$(readlink -f $filebase)" ;;
	"drun") debugonone ;;
	"clean") clean ;;
esac