$XDG_DATA_DIR not defined

[fekir]

In the README it is described how plugins are loaded from $XDG_DATA_DIR. This variable is not defined on my computer, and isn't apparently described at freedesktop.org

Maybe it was meant the variable $XDG_DATA_DIRS (final S!)

[oz123]

What is meant with $XDG_DATA_DIRS is the application directories laying in XDG_HOME

From the specification:

 $XDG_DATA_HOME defines the base directory relative to which user specific data files should be stored. If $XDG_DATA_HOME is either not set or empty, a default equal to $HOME/.local/share should be used. 
 $XDG_DATA_DIRS defines the preference-ordered set of base directories to search for data files in addition to the $XDG_DATA_HOME base directory. The directories in $XDG_DATA_DIRS should be seperated with a colon ':'. 

So you specify it yourself.

Also, looking at the source code you can see that plugins are loaded from any of those dirs you specified or from the default:

python-caja/src/caja-python.c

Line 262 in fdec828

// Look in XDG_DATA_DIR, ~/.local/share/caja-python/extensions

    // Look in XDG_DATA_DIR, ~/.local/share/caja-python/extensions
    user_extensions_dir = g_build_filename(g_get_user_data_dir(), 
        "caja-python", "extensions", NULL);
    caja_python_load_dir(module, user_extensions_dir);

See here: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

[fekir]

I'm sorry, but I'm still confused.

g_get_user_data_dir() should return, on my pc "/.local/share", so in that snippet g_build_filename should return "/.local/share/caja-python/extensions".

I've no idea what DATADIR is set, to, but it seems to be a macro, so it's set at compile time, and I guess it'll be /usr/share (on GNU/Linux), so that the final path is /usr/share/caja-python/extensions.

I do not get the correlation between XDG_DATA_DIR (not used in the source, it's only there as a comment, and not defined in https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html), and the other two paths that I've mentioned (and also reported in the README).

The only variable, as far as I can see, I can configure, is the $XDG_DATA_HOME, but specifying $XDG_DATA_DIR myself, like you said and described in the README, would have no effect, or did I miss something?