#! /bin/sh

# install-staticdblibs.sh -- shell script to fetch, build and install
#                            the static libraries bogofilter links against,
#                            to ease building of portable RPMs.

# (C) Copyright 2005,2006,2007  Matthias Andree <matthias.andree@gmx.de>
#
# 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 <http://www.gnu.org/licenses/>.

# this script requires these in the PATH:
# ---------------------------------------
# sudo          - must be configured properly for the user running this script
# wget or curl  - must be installed
# md5sum or md5 - must be installed
# gunzip        - must be installed
# tar           - must be installed
# make          - must be installed

# this script will:
# -----------------
# download  6 MB from the network
# require  44 MB in /var/tmp
# require   3 MB in /opt

# _fetch_xxx URL
_fetch_curl() {
    curl -q -s -S -L -O "$1"
}

_fetch_wget() {
    wget -nc -nv "$1"
}

# fetch URL
# fetch a file with curl or wget
fetch() {
    if command -v >/dev/null 2>&1 curl ; then
	_fetch_curl "$@"
    else
	_fetch_wget "$@"
    fi
}

# _md5_file FILE
# check MD5 sum of a single file
_md5_file() {
    if command -v >/dev/null 2>&1 md5sum
    then
	md5sum "$1" | cut -f1 -d" "
    else if command -v >/dev/null 2>&1 md5
    then
	md5 -q "$1"
    else
	echo >&2 "Cannot calculate md5 hash, no program found."
	exit 1
    fi
    fi
}

# fetch file and check MD5 sum
want() {
    f=${1##*/}
    if test ! -f ${f} || test "$(_md5_file ${f})" != "$2" ; then
	rm -f ${f}
	echo "fetching $1 -> ${f}"
	fetch "$1"
    else
	echo "${f} was already downloaded, reusing it"
    fi
    if test "$(_md5_file ${1##*/})" = "$2" ; then
	echo "${f} MD5 checksum OK"
    else
	echo "${f} MD5 checksum FAIL, aborting." >&2
	exit 1
    fi
}

set -e

cat <<'_EOF'
---------------------------------------------------------------------
install-staticdblibs.sh  Copyright (C) 2005,2006,2007 Matthias Andree
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it under
certain conditions.
Read the accompanying file gpl-3.0.txt for details.
---------------------------------------------------------------------

_EOF

cd ${TMPDIR:=/var/tmp}

dbdir=db-4.2.52
dbpfx=/opt/db-4.2-lean
sqdir=sqlite-3.4.1
sqpfx=/opt/sqlite-3-lean

### download SleepyCat DB 4.2.52 and patches
source=oracle.com
build_db=0
dbpatches="1 2 3 4 5"
checklib=$dbpfx/lib/libdb.a
if test ! -f $checklib ; then
    case $source in
	oracle.com)
	URL1=http://download.oracle.com/berkeley-db
	URL2=http://www.oracle.com/technology/products/berkeley-db/db/
	want $URL1/db-4.2.52.tar.gz             8b5cff6eb83972afdd8e0b821703c33c
	want $URL2/update/4.2.52/patch.4.2.52.1 1227f5f9ff43d48b5b1759e113a1c2d7
	want $URL2/update/4.2.52/patch.4.2.52.2 3da7efd8d29919a9113e2f6f5166f5b7
	want $URL2/update/4.2.52/patch.4.2.52.3 0bf9ebbe852652bed433e522928d40ec
	want $URL2/update/4.2.52/patch.4.2.52.4 9cfeff4dce0c11372c0b04b134f8faef
	want $URL2/update/4.2.52/patch.4.2.52.5 99836f962361da8936219cc193edc7ed
	;;
    esac
    build_db=1
else
    echo "$checklib already exists, not building Berkeley DB."
fi

### download SQLite 3.3.5
# Info: the objdump test fixes up the effects of a bug
# in an earlier version of this script, which built
# a sqlite 3.2.8 version that required GLIBC_2.3.
source=sqlite.org
build_sqlite=0
checklib=$sqpfx/lib/libsqlite3.a
if test ! -f $checklib || \
    objdump -t /opt/sqlite-3-lean/lib/libsqlite3.a \
	| grep -q __ctype_b_loc ; then
    case $source in
    sqlite.org)
	URL=http://www.sqlite.org ;;
    bogofilter.org)
	URL=ftp://ftp.bogofilter.org/pub/outgoing/tools/SQLite ;;
    esac
    want $URL/sqlite-3.4.1.tar.gz 0f06955b18da295fecb62d4bf9ded3c6
    build_sqlite=1
else
    echo "$checklib already exists, not building SQLite3."
fi

# build DB 4.2
if test $build_db = 1 ; then
    rm -rf $dbdir
    gunzip -c -d $dbdir.tar.gz | tar xf -
    for N in $dbpatches ; do
	if [ -f patch.4.2.52.$N ] ; then
	    patch -s -d $dbdir -p0 <patch.4.2.52.$N
	fi
    done
    echo "installing $dbdir into $dbpfx"
    cd $dbdir/build_unix
    env CPPFLAGS=-D__NO_CTYPE ../dist/configure \
	--prefix=$dbpfx --silent \
	--with-mutex=x86/gcc-assembly \
	--disable-cxx --disable-shared \
	--disable-queue --disable-replication \
	--disable-hash  --disable-cryptography
    make -s
    sudo make -s install_setup install_include install_lib
    # fix permissions:
    sudo chown -R 0:0 $dbpfx
    sudo chmod -R a-w $dbpfx
    # save some kBytes:
    sudo ln -f $dbpfx/lib/libdb-4.2.a $dbpfx/lib/libdb.a
    echo "$dbdir was installed into $dbpfx"
    cd - >/dev/null
    rm -rf $dbdir
fi

# build SQLite 3
if test $build_sqlite = 1 ; then
    rm -rf build-$sqdir $sqdir
    gunzip -cd $sqdir.tar.gz | tar xf -
    set -e
    echo "installing $sqdir"
    mkdir -p build-$sqdir
    cd build-$sqdir
    env CFLAGS="-O2 -D__NO_CTYPE" ../$sqdir/configure \
	--prefix=$sqpfx --silent \
	--disable-shared --disable-tcl \
	--disable-threadsafe
    make -s
    sudo make -s install
    # fix permissions:
    sudo chown -R 0:0 $sqpfx
    sudo chmod -R a-w $sqpfx
    echo "$sqdir was installed into $sqpfx"
    cd - >/dev/null
    rm -rf build-$sqdir $sqdir
fi

rm -f $dbdir.tar.gz $sqdir.tar.gz patch.4.2.52.?