Snippet loader for lua

[L3MON4D3]

Considering the functionality in this wiki-entry will soon be deprecated is now deprecated, I'd like to add a loader for lua-snippets which is capable of loading them on-demand (like lazy_load from the current loaders)

I think a format very close to that of snipmate, eg. a directory containing ft.lua-files, each returns a table, containing keys snippets, autosnippets, would be pretty good, as it's almost compatible with the current solution.
Maybe we could also autodetect these collections by requiring that for autodetection they be named eg. luasnippets and be in a directory in path (just lua/snippets+require would work only as long as just one luasnippet-collection is present).

Reload after changes should be implementable by invalidating previously loaded snippets (I think we'll need a way to clean up invalidated snippets :D) and re-adding the changed file.

What do you guys think?

[leiserfg]

Is not that the same as putting the scripts to load the snippets on ftplugin?

[leiserfg]

The "new way" of storing the snippets @L3MON4D3 is working on is more like a register with several views, I'm not sure if using tables with __index magic will be nice, as it will require a lot of logic around. The faux deletion plus eventual cleanup seems more appropriate. Given that @L3MON4D3 is using setfenv already he could just track which snippets belong to each file and clean them all on reload.

[L3MON4D3]

Yes, It's elegant for the current internal layout, but using metatables and the like would require some working around for the one we'll be using soon.

But the idea of reloading for regular, non-lazy_loaded snippets is great, we could modify add_snippets to accept a key, calling it again with the same key invalidates previously loaded snippets and adds the new ones.
Should also not be too much to implement, we basically have everything necessary in loaders/from_lua, just have to move it to add_snippets/session.

[galou]

@L3MON4D3 the wiki-entry is already deprecated. Are you talking about this? I tried to configure my snippets as written there but didn't succeed. Should I wait a bit for this to be implemented?

My current attempt is lua/plugin_setup/luasnip.lua and lua/luasnippets/*.lua in https://github.com/galou/dotvim, commit 2252142](galou/dotvim@2252142). I use LuaSnip commit 80e6824.

[L3MON4D3]

Ah, right, I'll edit the comment, maybe I can point to an older version in the wiki.

The loader is implemented in your commit, you'll just have to move lua/luasnippets to luasnippets. I'll add an example for that path in the doc, reading it again it isn't that clear.

[galou]

I understand my error now. I interpreted "runtime path" as lua runtime path not vim runtime path.