Map uploading is broken as minimaps can no longer be generated

[SirVer]

Since the one world merger, minimaps can not be generated anymore. uploading new maps to the site is now impossible.

Traceback (most recent call last):

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
   response = callback(request, *callback_args, **callback_kwargs)

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 23, in _wrapped_view
   return view_func(request, *args, **kwargs)

 File "/var/www/django_projects/wlwebsite/code/widelands/wlmaps/views.py", line 93, in upload
   if form.is_valid():

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/forms/forms.py", line 121, in is_valid
   return self.is_bound and not bool(self.errors)

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/forms/forms.py", line 112, in _get_errors
   self.full_clean()

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/forms/forms.py", line 268, in full_clean
   self._clean_form()

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/django/forms/forms.py", line 296, in _clean_form
   self.cleaned_data = self.clean()

 File "/var/www/django_projects/wlwebsite/code/widelands/wlmaps/forms.py", line 42, in clean
   minimap = wlmap.make_minimap(WIDELANDS_SVN_DIR)

 File "/var/www/django_projects/wlwebsite/code/widelands/widelandslib/map.py", line 244, in make_minimap
   i = Image.open(datadir + '/worlds/' + self._world_name + '/pics/' + t.name + '_00.png').convert("RGB")

 File "/var/www/django_projects/wlwebsite/lib/python2.7/site-packages/PIL/Image.py", line 1974, in open
   fp = builtins.open(fp, "rb")

IOError: [Errno 2] No such file or directory: '/var/loaded_repositories/widelands_trunk//worlds/blackland/pics/ashes_00.png'

[SirVer (sirver)]

Shevonar, do you think you can look into that?

[Shevonar (shevonar)]

I might be able to take a look at this this weekend. I will see how i can incorporate your map_info library.

[SirVer (sirver)]

That would be awesome!!! I would like to work on it too, but I am traveling and I do not think I will have much time.

If you do, please also add a warning for new maps (the map_info.cc binary outputs an empty world name for new maps) that they only work with dev versions and b19 or later (or rather: requires Widelands > b18 or so, so that we do not need to change it again in the future).

Also, I go to the IRC channel if I work on Widelands. we can meet and coordinate there, so that we do not do double work. If I am not in the IRC, I am not working on the issue.

[SirVer (sirver)]

Thanks for taking care of this Shevonar. Quality work, as usual.

[GunChleoc (gunchleoc)]

Fixed in build19-rc1.