#!/bin/sh -e

# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

cd `dirname $0`

get () {
    variable_name=$1
    echo "changequote(\`[', \`]')" > acinclude.m4.tmp
    sed -e "s/m4_//" < acinclude.m4.in >> acinclude.m4.tmp
    echo $variable_name >> acinclude.m4.tmp
    if test -x "`which gm4 2> /dev/null || true`"; then
        gm4 acinclude.m4.tmp | grep -v "^$" || true
    else
        if test -x "`which m4 2> /dev/null || true`"; then
            m4 acinclude.m4.tmp | grep -v "^$" || true
        else
            echo unknown
        fi
    fi
    rm -f acinclude.m4.tmp
}

if test -z "$REVISION"; then
    if test -e .git; then
        REVISION=`git describe --always`
    fi
fi

if test -z "`get LOCAL_VERSION_STAGE`" -o -z "$REVISION"; then
    sed "s/%revision%//" < acinclude.m4.in > acinclude.m4
else
    sed "s/%revision%/$REVISION/" < acinclude.m4.in > acinclude.m4
fi

if test -e .git; then
    OS=`uname -s`
    case "$OS" in
    Linux|CYGWIN*) # GNU sed
        SED_ERE_FLAG=-r
    ;;
    *) # BSD sed
        SED_ERE_FLAG=-E
    ;;
    esac

    sed -e "/^#.*/d" THANKS.in > THANKS
    CONTRIB_EMAIL_SED_COMMAND="s/^[[:blank:]]{5}[[:digit:]]+[[:blank:]]/ * /"
    git shortlog -se 6c976bd..HEAD \
        | grep -v @apache.org \
        | sed $SED_ERE_FLAG -e "$CONTRIB_EMAIL_SED_COMMAND" >> THANKS
    echo "" >> THANKS # simplest portable newline
    echo "For a list of authors see the \`AUTHORS\` file." >> THANKS
fi

find_program() {
  set +e
  for f in "$@"
  do
    file=`which ${f} 2>/dev/null | grep -v '^no '`
    if test -n "x${file}" -a -x "${file}"
    then
      echo ${file}
      set -e
      exit 0
    fi
  done

  echo "Unable to find any variant: $@" 1>&2
  echo 1>&2
  echo "Have you installed a version of this package?" 1>&2
  set -e
  exit 1
}

LIBTOOLIZE=`find_program glibtoolize libtoolize`
ACLOCAL=`find_program aclocal-1.11 aclocal-1.10 aclocal-1.9 aclocal`
AUTOHEADER=`find_program autoheader`
AUTOMAKE=`find_program automake-1.11 automake-1.10 automake-1.9 automake`
AUTOCONF=`find_program autoconf`

get_aclocal_dir_list () {
    aclocal_dir=`$ACLOCAL --print-ac-dir`
    echo $aclocal_dir
    aclocal_dirlist="$aclocal_dir/dirlist"
    if test -e $aclocal_dirlist; then
        cat $aclocal_dirlist | while read dir; do
            if test -d "$dir"; then
                echo $dir
            fi
        done
    fi
}

aclocal_dir_list=`get_aclocal_dir_list`

if test -z "`find $aclocal_dir_list -name ax_check_icu.m4`"; then
    echo "Unable to find the \`ax_check_icu.m4' file."
    echo
    echo "Have you installed GNU Autoconf Archive?"
    exit 1
fi

if test -z "`find $aclocal_dir_list -name ax_lib_curl.m4`"; then
    echo "Unable to find the \`ax_check_icu.m4' file."
    echo
    echo "Have you installed GNU Autoconf Archive?"
    exit 1
fi

if test -z "`find $aclocal_dir_list -name pkg.m4`"; then
    echo "Unable to find the \`pkg.m4' file."
    echo
    echo "Have you installed pkg-config?"
    exit 1
fi


mkdir -p build-aux
mkdir -p m4

${LIBTOOLIZE} -f -c --automake
${ACLOCAL} -I m4 -Wall
${AUTOHEADER} -f
${AUTOMAKE} -f -a -Wall
${AUTOCONF} -f -Wall

rm -f INSTALL

ln -f -s "`dirname \`readlink build-aux/missing\``/INSTALL"

if test ! -s INSTALL; then
	echo "Broken INSTALL file."
	exit 1
fi

cat << EOF
You have bootstrapped Apache CouchDB, time to relax.

Run \`./configure' to configure the source before you install.
EOF