In the scenario where the user (me) wants to run Mediagoblin under, for example, example.com/mg/, mediagoblin makes this very difficult.

I was able to route /mgoblin_static to /mg/mgoblin_static, and was able to serve the main page under /mg, but was unable to use the site as other actions (like submitting new media) brought me back to / rooted URLs.

Official support for prefixes would be quite nice for people who want to have small setups, or don't want to have a subdomain for this program.

Without this patch:

$ ./bin/gmg assetlink
/var/www/mediagoblin/mg/mediagoblin/media_types/video/transcoders.py:37: PyGIWarning: GstPbutils was imported without specifying a version first. Use gi.require_version('GstPbutils', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import GstPbutils
WARNING: audiolab is not installed so wav2png will not work
Traceback (most recent call last):
  File "./bin/gmg", line 11, in <module>
    load_entry_point('mediagoblin', 'console_scripts', 'gmg')()
  File "/var/www/mediagoblin/mg/mediagoblin/gmg_commands/__init__.py", line 148, in main_cli
    args.func(args)
  File "/var/www/mediagoblin/mg/mediagoblin/gmg_commands/assetlink.py", line 141, in assetlink
    mgoblin_app = commands_util.setup_app(args)
  File "/var/www/mediagoblin/mg/mediagoblin/gmg_commands/util.py", line 28, in setup_app
    mgoblin_app = app.MediaGoblinApp(args.conf_file)
  File "/var/www/mediagoblin/mg/mediagoblin/app.py", line 121, in __init__
    self.theme_registry, self.current_theme = register_themes(self.app_config)
  File "/var/www/mediagoblin/mg/mediagoblin/tools/theme.py", line 83, in register_themes
    and registry.has_key(current_theme_name):
AttributeError: 'dict' object has no attribute 'has_key'

With this patch:

$ ./bin/gmg assetlink
/var/www/mediagoblin/mg/mediagoblin/media_types/video/transcoders.py:37: PyGIWarning: GstPbutils was imported without specifying a version first. Use gi.require_version('GstPbutils', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import GstPbutils
WARNING: audiolab is not installed so wav2png will not work
Linked the theme's asset directory:
  /var/www/mediagoblin/mg/mediagoblin/themes/airy/assets
to:
  /var/www/mediagoblin/mg/user_dev/theme_static
Skipping "coreplugin_basic_auth"; already set up.

Patch:

diff --git a/mediagoblin/tools/theme.py b/mediagoblin/tools/theme.py
index 97b041a6..ebb03980 100644
--- a/mediagoblin/tools/theme.py
+++ b/mediagoblin/tools/theme.py
@@ -80,7 +80,7 @@ def register_themes(app_config, builtin_dir=BUILTIN_THEME_DIR):

     current_theme_name = app_config.get('theme')
     if current_theme_name \
-            and registry.has_key(current_theme_name):
+            and current_theme_name in registry.keys():
         current_theme = registry[current_theme_name]
     else:
         current_theme = None

I found out that the exif-py that GMG use is too old. The new one can read the Nikon EXIF tags without a problem.