make get_database_version_by_release more flexible

instead of requireing a full list of all releases,
fetch the closests smaller release and take database version from it.

Fixes 391: make get_database_version_by_release don't rely on a versions.map that contains information about all releases

scripts/bareos-config-lib.sh.in

@@ -135,7 +135,14 @@ get_database_version_by_release()
         return 1
     fi
 
-    db_version=`sed -n "s/^${release}=//p" $MAP`
+    MARKER=0
+    VERSIONS=`cat "$MAP"; echo "$release=$MARKER"`
+
+    # add marker to list,
+    # sort the list reverse, assuming versions x.y.z  and lines x.y.z=db_version,
+    # get entry one line after marker
+    db_version=`printf "$VERSIONS" | sort -t. -k 1,1rn -k 2,2rn -k 3,3rn | sed -r -n "/[0-9\.]=$MARKER$/{ N; s/(.*)=(.*)\n(.*)=(.*)/\4/p }"`
+
     if [ -z "$db_version" ]; then
         db_version=`sed -n "s/^default=//p" $MAP`
         if [ "$db_version" ]; then
@@ -145,6 +152,7 @@ get_database_version_by_release()
             return 1
         fi
     fi
+
     echo "$db_version"
     return
 }

src/cats/ddl/versions.map.in

@@ -3,22 +3,9 @@
 # from bareos-config to retrieve the matching version.
 # It is used by the dbconfig mechanismen of Debian distributions.
 
-default=@BDB_VERSION@
-
 12.4.0=2001
-12.4.1=2001
-12.4.2=2001
-12.4.3=2001
-12.4.4=2001
-12.4.5=2001
-12.4.6=2001
-12.4.7=2001
-
 13.2.0=2001
-13.2.1=2001
-13.2.2=2001
 13.2.3=2002
-13.2.4=2002
+14.2.0=2003
 
-14.2.1=2003
-14.2.2=2003
+default=@BDB_VERSION@