#!/bin/bash
# Run this to generate all the initial makefiles, etc.

DIE=0
package=GStreamer
srcfile=gst/gstobject.h
#DEBUG=defined
if test "x$1" = "x-d"; then echo "+ debug output enabled"; DEBUG=defined; fi

debug ()
# print out a debug message if DEBUG is a defined variable
{
  if test ! -z "$DEBUG"
  then
    echo "DEBUG: $1"
  fi
}

version_check ()
# check the version of a package
# first argument : package name (executable)
# second argument : source download url
# rest of arguments : major, minor, micro version
{
  PACKAGE=$1
  URL=$2
  MAJOR=$3
  MINOR=$4
  MICRO=$5


  debug "major $MAJOR minor $MINOR micro $MICRO"
  VERSION=$MAJOR
  if test ! -z "$MINOR"; then VERSION=$VERSION.$MINOR; else MINOR=0; fi
  if test ! -z "$MICRO"; then VERSION=$VERSION.$MICRO; else MICRO=0; fi

  debug "major $MAJOR minor $MINOR micro $MICRO"
  echo -n "+ checking for $1 > $VERSION ... "
  ($PACKAGE --version) < /dev/null > /dev/null 2>&1 || 
  {
	echo
	echo "You must have $PACKAGE installed to compile $package."
	echo "Download the appropriate package for your distribution,"
	echo "or get the source tarball at $URL"
	return 1
  }
  # the following line is carefully crafted sed magic
  pkg_version=`$PACKAGE --version|head -n 1|sed 's/^[a-zA-z\.\ ()]*//;s/ .*$//'`
  debug "pkg_version $pkg_version"
  pkg_major=`echo $pkg_version | cut -d. -f1`
  pkg_minor=`echo $pkg_version | cut -d. -f2`
  pkg_micro=`echo $pkg_version | cut -d. -f3`
  test -z "$pkg_minor" && pkg_minor=0
  test -z "$pkg_micro" && pkg_micro=0

  debug "found major $pkg_major minor $pkg_minor micro $pkg_micro"

  #start checking the version
  debug "version check"

  if [ ! "$pkg_major" \> "$MAJOR" ]; then
    debug "$pkg_major <= $MAJOR"
    if [ "$pkg_major" \< "$MAJOR" ]; then
      WRONG=1
    elif [ ! "$pkg_minor" \> "$MINOR" ]; then
      if [ "$pkg_minor" \< "$MINOR" ]; then
        WRONG=1
      elif [ "$pkg_micro" \< "$MICRO" ]; then
	WRONG=1
      fi
    fi
  fi

  if test ! -z "$WRONG"; then
    echo "- found $pkg_version, not ok !"
    echo
    echo "You must have $PACKAGE $VERSION or greater to compile $package."
    echo "Get the latest version from $URL"
    return 1
  else
    echo "- found $pkg_version, ok."
  fi
}

version_check "autoconf" "ftp://ftp.gnu.org/pub/gnu/autoconf/" 2 52 || DIE=1
version_check "automake" "ftp://ftp.gnu.org/pub/gnu/automake/" 1 5 || DIE=1
version_check "libtool" "ftp://ftp.gnu.org/pub/gnu/libtool/" 1 4 0 || DIE=1
version_check "pkg-config" "http://www.freedesktop.org/software/pkgconfig" 0 7 0 || DIE=1

echo

if test "$DIE" -eq 1; then
	exit 1
fi

test -f $srcfile || {
	echo "You must run this script in the top-level $package directory"
	exit 1
}

if test -z "$*"; then
	echo "I am going to run ./configure with no arguments - if you wish "
        echo "to pass any to it, please specify them on the $0 command line."
fi

# FIXME : why does libtoolize keep complaining about aclocal ?
echo "+ running libtoolize ..."
libtoolize --copy --force

echo "+ running aclocal ..."
aclocal $ACLOCAL_FLAGS || {
	echo
	echo "aclocal failed - check that all needed development files are present on system"
	exit 1
}
echo "+ running autoheader ... "
autoheader || {
	echo
	echo "autoheader failed"
	exit 1
}
echo "+ running autoconf ... "
autoconf || {
	echo
	echo "autoconf failed"
	#exit 1
}
echo "+ running automake ... "
automake --add-missing || {
	echo
	echo "automake failed"
	#exit 1
}

# now remove the cache, because it can be considered dangerous in this case
echo "+ removing config.cache ... "
rm -f config.cache

CONFIGURE_OPT='--enable-maintainer-mode --enable-plugin-builddir --enable-debug --enable-DEBUG'

echo "+ running configure ... "
echo "./configure default flags: $CONFIGURE_OPT"
echo "using: $CONFIGURE_OPT $@"
echo

./configure $CONFIGURE_OPT "$@" || {
	echo
	echo "configure failed"
	exit 1
}

echo 
echo "Now type 'make' to compile $package."