#!/bin/sh
# Convenience script for regenerating all autogeneratable files that are
# omitted from the version control repository. In particular, this script
# also regenerates all aclocal.m4, config.h.in, Makefile.in, configure files
# with new versions of autoconf or automake.
#
# This script requires autoconf-2.63..2.69 and automake-1.11..1.16 in the PATH.
# It also requires either
#   - the GNULIB_TOOL environment variable pointing to the gnulib-tool script
#     in a gnulib checkout, or
#   - the git program in the PATH and an internet connection.
# It also requires
#   - the gperf program.

# Copyright (C) 2003-2012, 2016, 2018 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

# Usage: ./autogen.sh [--skip-gnulib]
#
# Usage from a git checkout:                 ./autogen.sh
# This uses an up-to-date gnulib checkout.
#
# Usage from a released tarball:             ./autogen.sh --skip-gnulib
# This does not use a gnulib checkout.

skip_gnulib=false
while :; do
  case "$1" in
    --skip-gnulib) skip_gnulib=true; shift;;
    *) break ;;
  esac
done

if test $skip_gnulib = false; then
  if test -z "$GNULIB_TOOL"; then
    # Check out gnulib in a subdirectory 'gnulib'.
    if test -d gnulib; then
      (cd gnulib && git pull)
    else
      git clone git://git.savannah.gnu.org/gnulib.git
    fi
    # Now it should contain a gnulib-tool.
    if test -f gnulib/gnulib-tool; then
      GNULIB_TOOL=`pwd`/gnulib/gnulib-tool
    else
      echo "** warning: gnulib-tool not found" 1>&2
    fi
  fi
  # Skip the gnulib-tool step if gnulib-tool was not found.
  if test -n "$GNULIB_TOOL"; then
    $GNULIB_TOOL --copy-file build-aux/ar-lib || exit $?
    chmod a+x build-aux/ar-lib || exit $?
    make -f Makefile.devel \
         gnulib-clean srclib/Makefile.gnulib gnulib-imported-files \
         GNULIB_TOOL="$GNULIB_TOOL"
  fi
fi

make -f Makefile.devel totally-clean all || exit $?

# Copy files into the libcharset subpackage, so that libcharset/autogen.sh
# does not need to invoke gnulib-tool nor automake.
for file in INSTALL.generic; do
  cp -p $file libcharset/$file || exit $?
done
for file in config.guess config.libpath config.sub install-sh mkinstalldirs; do
  cp -p build-aux/$file libcharset/build-aux/$file || exit $?
done
for file in codeset.m4 fcntl-o.m4 glibc21.m4 visibility.m4; do
  cp -p srcm4/$file libcharset/m4/$file || exit $?
done

(cd libcharset
 ./autogen.sh || exit $?
)

echo "$0: done.  Now you can run './configure'."