|Subject:||Packaging goldendict with support for optionally installed dictionaries|
|Date:||Sun, 29 Oct 2017 16:14:30 +1100|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Icedove/52.4.0|
I'm working on packaging goldendict, a dictionary reader, along with
many free dictionaries in various languages. This essentially
requires "optional dependencies", a concept alien to Guix's
functional model. However some by default goldendict checks
directories such as /usr/share/stardict/dic for dictionaries, but Guix has 2 other locations
dictionaries may be found;
A couple packages like ibus and aspell solve this using 'native-search-paths' which seems to require the program to have an environment variable it checks for search paths, which goldendict doesn't. There isn't much documentation on native-search-paths so I don't know what it actually does.
libxt has a patch that hard codes the rule to check /run/current-system/profile, and if GUIX_PROFILE exists, check that, otherwise if HOME exists check $HOME/.guix-profile/...
That's the only solution I can see working unless anyone has a better suggestion, I'd like to ask for some help writing the patch though since I've never written any C/C++ before, I was stuck figuring out how to define a string :(.
I think it can be done by making a copy of this code block and wrapping it in the above logic: https://github.com/goldendict/goldendict/blob/master/config.cc#L335
It would be good to keep the original /usr/share search paths so that goldendict will interoperate if guix is installed on a foreign distro.
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