id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
438259941,MDU6SXNzdWU0MzgyNTk5NDE=,440,Plugin hook for additional data export formats,45057,closed,0,,,0,2019-04-29T11:01:39Z,2019-05-01T23:01:57Z,2019-05-01T23:01:57Z,CONTRIBUTOR,,"It would be nice to have a simple way for plugins to provide additional data export formats. Might require a bit of work on the internals. I can work around this at a lower level with the `prepare_sanic` hook from #437 in the mean time.

I guess plugins should be able to register a function which takes a row or list of rows and returns the rendered data. They'll also need to provide a file extension and probably a Content-Type.

Datasette could then automatically include this format in the list of export formats on each page.

Looks like this is related to #119.",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/440/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
438437973,MDExOlB1bGxSZXF1ZXN0Mjc0NDY4ODM2,441,Add register_output_renderer hook,45057,closed,0,,,8,2019-04-29T18:03:21Z,2019-05-01T23:01:57Z,2019-05-01T23:01:57Z,CONTRIBUTOR,simonw/datasette/pulls/441,"This changeset refactors out the JSON renderer and then adds a hook and
dispatcher system to allow custom output renderers to be registered.

The CSV output renderer is untouched because supporting streaming
renderers through this system would be significantly more complex, and
probably not worthwhile.

We can't simply allow hooks to be called at request time because we need
a list of supported file extensions when the request is being routed in
order to resolve ambiguous database/table names. So, renderers need to
be registered at startup.

I've tried to make this API independent of Sanic's request/response
objects so that this can remain stable during the switch to ASGI. I'm
using dictionaries to keep it simple and to make adding additional
options in the future easy.

Fixes #440",107914493,pull,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/441/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0,
438240541,MDExOlB1bGxSZXF1ZXN0Mjc0MzEzNjI1,439,[WIP] Add primary key to the extra_body_script hook arguments,45057,closed,0,,,2,2019-04-29T10:08:23Z,2019-05-01T09:58:32Z,2019-05-01T09:58:30Z,CONTRIBUTOR,simonw/datasette/pulls/439,"This allows the row to be identified on row pages. The context here is that I want to access the row's data to plot it on a map.

I considered passing the entire template context through to the hook function. This would expose the actual row data and potentially avoid a further fetch request in JS, but it does make the plugin API a lot more leaky. 

(At any rate, using the selected row data is tricky in my case because of Spatialite's infuriating custom binary representation...)",107914493,pull,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/439/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",0,