#! /usr/bin/env bash

# file      : build/meta/autoconf
# copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
# license   : GNU GPL v2; see accompanying LICENSE file

# Process autconf configure.ac templates.
#
# Options:
#
# -b <base-dir>
# -o <output-file>
#
# Arguments:
#
# <template-file>
#
trap 'exit 1' ERR

function error ()
{
  echo "$*" 1>&2
}

base=
output=

while [ $# -gt 0 ]; do
  case $1 in
    -b)
      base=$2
      shift 2
      ;;
    -o)
      output=$2
      shift 2
      ;;
    *)
      break
      ;;
  esac
done

input=$1

if [ "$input" = "" ]; then
  error "no input file"
  exit 1
fi

if [ "$base" = "" ]; then
  error "no base directory"
  exit 1
fi

if [ "$output" = "" ]; then
  error "no output file"
  exit 1
fi

m4=m4

# Assume this script is never found via PATH.
#
meta=`dirname $0`

build="$meta/.."
install=$build/install/install

# Find all the configuration files.
#
files=`find $base -name 'Makefile.am' -o -name '*.in' -a ! -name '*.h.in' | \
sed -e "s%^$base/%%" | \
sed -e 's%\.\(am\|in\)$%%' | \
sort -u`

export config_files=$files

# Make sure the output directory exist.
#
$install -d -m 755 `dirname $output`

$m4 -P -D__meta_base__=$meta $meta/autoconf.m4 $input >$output
chmod 644 $output