[Nix-dev] how to write nix expressions for packages that have plugins

[cdep.illabout at gmail.com]

> There are two methods I've seen:
> (...)
> 2. create a merge nix package: A package which takes the application plus
> all plugins requested and builds the directory layout the application
> expects with all the plugins linked into the right folder. This package is
> then added to the environment of the user.

Can you give an example of a package in nix that is using this
approach?  I'm interested in how to go about writing a nix-expression
that does this.

>
> On Thu, Oct 16, 2014 at 8:17 AM, cdep.illabout at gmail.com
> <cdep.illabout at gmail.com> wrote:
>>
>> Hi,
>>
>> I'm trying to write a nix expression for a plugin for a package.  I'm
>> running into a problem where the package doesn't know where to look
>> for the new plugin.
>>
>> The original package stores all of it's plugins in
>> /nix/store/xxx-package/lib/packagename/{plugin1,plugin2,mycoolplugin}.so.
>> It expects all of it's plugins to be there.  There doesn't appear to
>> be any way of telling the program that it needs to look for plugins in
>> other directories.
>>
>> How is this type of problem usually solved in other nix packages?
>>
>> The package/plugin combination in question is "fcitx" and
>> "fcitx-anthy".  It's an input method editor commonly used to input
>> Chinese, Japanese, and Korean (among other languages).  I raised a
>> question about this package/plugin combination on github, but I am
>> also interested in how it's solved in general.
>>
>> https://github.com/NixOS/nixpkgs/issues/4550
>>
>> I have also raised a question on the fcitx issue tracker for anyone
>> curious:
>>
>> https://github.com/fcitx/fcitx/issues/179
>>
>> Finally, in case anyone wants to look at the the original
>> nix-expressions, here they are:
>>
>> fcitx:
>>
>> https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/inputmethods/fcitx/default.nix
>>
>> fcitx-anthy:
>>
>> https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/inputmethods/fcitx/fcitx-anthy.nix
>>
>> Thanks,
>> Dennis
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>
>