#! /bin/bash

# Find the directory containing this script.
source="${BASH_SOURCE[0]}"
while [ -h "${source}" ] ; do
  eccdir="$(cd -P "$(dirname "${source}")" && pwd)"
  source="$(readlink "${source}")"
  [[ ${source} != /* ]] && source="$DIR/${source}"
done
eccdir="$(cd -P "$(dirname "${source}")" && pwd)"

# Check for a previous ELLCC definition.
if [ -z "${ELLCC}" ] ; then
  ELLCC=~/ellcc
fi

# Look for the libecc directory.
dirs=( $(dirname $eccdir)/libecc ${ELLCC}/libecc /usr/local/libecc /usr/libecc )
LIBECC=
for dir in "${dirs[@]}" ; do
	if [ -d ${dir} ] ; then
    LIBECC=${dir}
		break
  fi
done

# Get the invocation name.
name=$(basename ${BASH_SOURCE[0]})

if [ -z "${LIBECC}" ] ; then
  echo ${name}: could not find libecc in any of the expected places.
  echo checked: ${dirs[@]}
  exit 1
fi

# Check for C or C++.
if [[ ${name} == *ecc ]] ; then
  cplusplus=n
elif [[ ${name} == *ecc++ ]] ; then
  cplusplus=y
else
  echo ${name}: does not end in ecc or ecc++
  exit 1
fi

get_config() {
  if [ -e $1 ] ; then
    echo $1
  elif [ -e ${TOOLINFO}/$1 ] ; then
    echo ${TOOLINFO}/$1
  else
    echo -n ""
  fi
}

# See if a target is defined in the name.
TARGET=
if [[ ${name} == *-ecc ]] ; then
  candidate=$(basename -s -ecc ${name})
  if [ -e ${TOOLINFO)/${candidate} ] ; then
    TARGET=${candidate}
  else
    echo ${name}: ${candidate} is not a defined target name.
    exit 1
  fi
elif [[ ${name} == *-ecc++ ]] ; then
  candidate=$(basename -s -ecc++ ${name})
  if [ -e ${TOOLINFO}/${candidate} ] ; then
    TARGET=${candidate}
  else
    echo ${name}: ${candidate} is not a defined target name.
    exit 1
  fi
fi

# Find ecc command line arguments, gather the rest in ARGS.
ARGS=()
index=0
target_position=0

while [ $# -ne 0 ] ; do
  case "$1" in
    -target)
     shift
     candidate=$1
     if [ "$(get_config ${candidate})" != "" ] ; then
       TARGET=${candidate}
       target_position=${index}
     else
       echo ${name}: ${candidate} is not a defined target name.
       exit 1
     fi
     shift
     ;;
    -e|--environment)
     environment=y
     shift
     ;;
   *)
     ARGS+=("$1")
     shift
     (( index++ ))
     ;;
  esac
done

parse_yaml() {
    local prefix=$2
    local s
    local w
    local fs
    s='[[:space:]]*'
    w='[a-zA-Z0-9_]*'
    fs="$(echo @|tr @ '\034')"
    sed -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
        -e "s|^\($s\)\($w\)$s[:-]$s\(.*\)$s\$|\1$fs\2$fs\3|p" "$1" |
    awk -F"$fs" '{
    indent = length($1)/2;
    vname[indent] = $2;
    for (i in vname) {if (i > indent) {delete vname[i]}}
        if (length($3) > 0) {
            vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
            printf("%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, $2, $3);
        }
    }' | sed 's/_=/+=/g'
}

if [ -n ${TARGET} ] ; then
  # Get configuration information.
  file=$(get_config ${TARGET})
  eval $(parse_yaml $file config_)
  echo ${config_linker_options[@]}
fi