update-lmdb.sh

#!/bin/sh
#
# Script to update our copy of the LMDB library and headers
# Releases can be found here: https://github.com/LMDB/lmdb/releases
#

function get_define {
    grep "^#define $1" lmdb/lmdb.h  | head -1 | awk '{print $3}'
}

function get_version {
    echo "$(get_define MDB_VERSION_MAJOR).$(get_define MDB_VERSION_MINOR).$(get_define MDB_VERSION_PATCH)"
}

cur_version="$(get_version)"
echo "Current LMDB version: $cur_version"
echo

version="$1"

if [ -z "$version" ]; then
    echo "USAGE: $0 <desired-version>"
    echo "Check https://github.com/LMDB/lmdb/releases for available versions"
    exit 1
fi

set -ex

tmp_dir=$(mktemp -d -t lmdb-update)
echo "Temp dir: $tmp_dir"
 
curl -L "https://github.com/LMDB/lmdb/archive/refs/tags/LMDB_${version}.tar.gz" | tar -C "$tmp_dir" -xvz
cp "$tmp_dir/lmdb-LMDB_${version}/libraries/liblmdb/mdb.c" lmdb/mdb.c
cp "$tmp_dir/lmdb-LMDB_${version}/libraries/liblmdb/lmdb.h" lmdb/lmdb.h
cp "$tmp_dir/lmdb-LMDB_${version}/libraries/liblmdb/CHANGES" CHANGES.lmdb.txt
 
if [ ! -z "$tmp_dir" ]; then 
    echo "Removing temp dir: $tmp_dir"
    rm -rf "$tmp_dir"
fi

set +ex
echo
new_version="$(get_version)"
echo "New LMDB version: $new_version"
echo
echo "NOTE: Do not forget to include the upstream changelog from $cur_version to $new_version from"
echo "      CHANGES.lmdb.txt in our CHANGES.md, and do not forget to test!"