`osm2pgsql-test-style` fails to load external lua style when replication tool is unavailable

[JakobMiksch]

related to #2464

What version of osm2pgsql are you using?

osm2pgsql version 2.1.1
Build: None
Compiled using the following library versions:
Libosmium 2.22.0
Proj 9.6.0
Lua 5.3.6

What operating system and PostgreSQL/PostGIS version are you using?

PostgreSQL 17 and PostGIS from Debian 13 stable packages

Tell us something about your system

not relevant

What did you do exactly?

• i run standalone osm2pgsql-test-style WITHOUT osm2pgsql-replication next to it
• my command: ./osm2pgsql-test-style trees.feature

content of trees.feature:

Feature: Test import of trees

  Scenario: An OSM tree node will be imported
    Given the OSM data
      """
      n12 Tnatural=tree,name=Old%20%Oak x34.6 y56.374
      n20 Thighway=bus_stop x34.66 y56.377
      """
    Given the style file 'trees.lua'
    When running osm2pgsql flex
    Then table trees contains exactly
      | node_id | name    |
      |      12 | Old Oak |

references style file trees.lua:

local trees = osm2pgsql.define_node_table('trees', {
    { column = 'name', type = 'text' },
    { column = 'geom', type = 'point', srid = 4326 }
})

function osm2pgsql.process_node(object)
    if object.tags.natural == 'tree' then
        trees:insert {
            name = object.tags.name,
            geom = object:as_point()
        }
    end
end

What did you expect to happen?

I expected that the tests pass.

What did happen instead?

The tests failed, because the testing itself had an error with this message:

HOOK-ERROR in before_scenario: AttributeError: 'NoneType' object has no attribute 'ReplicationServer' and no __dict__ for setting new attributes

What did you do to try analyzing the problem?

I fixed it locally by commenting these lines:

osm2pgsql/scripts/osm2pgsql-test-style

Line 167 in 8b7d01a

osm2pgsql_replication.ReplicationServer = None

osm2pgsql/scripts/osm2pgsql-test-style

Line 175 in 8b7d01a

osm2pgsql_replication.urlrequest.urlopen = _mock_urlopen