Completion candidates for cider-find-resource

[expez]

If #1060 is tackled and #1059 is tackled we should also update cider-find-resource to give a completing read of all available resources, with thing-at-point providing a default for the jump.

[bbatsov]

Yeah, that'd be great. We'll need middleware support for this.

[bbatsov]

@alexander-yakushev maybe it makes sense to have some completion for resource names in compliment as well. Those can be triggered only in certain functions (e.g. resource).

[alexander-yakushev]

Why not. There can be a source for that, that will work in resource function, and can be also called independently by cider-find-resource. It's fairly easy to write that source for someone who knows about that resource stuff, but I can do it too if you give me some leads.

[alexander-yakushev]

@expez Do you know how to get a list of available resources?

[expez]

@alexander-yakushev I just started using clojure.java.classpath in refactor-nrepl yesterday to list stuff on classpath. If you don't want to pull in another dep the relevant code is only a few lines which can be inlined easily.

In general it's not possible to get a complete listing of everything on the classpath, you can only get resources by name or traverse it yourself (which might be real slow if there's a ton of stuff on cp).

After obtaining the content on classpath the simplest thing to do is:

1. Filter out all jars
2. Descend into every directory listed on classpath and recursively find files.

This should give you everything you want, but also quite a bit of stuff nobody cares about in this context (e.g. the source files for the project and I think target/classes).

To narrow the field further I think you have to consult project.clj or boot.clj in order to find out what the actual resources are.

[alexander-yakushev]

@expez Thank you, I will try it out.

[alexander-yakushev]

OK, done and done in 0.2.2-SNAPSHOT. Resource completion works only in the appropriate context that looks like (resource "__prefix__"). Resource function can have any namespace qualifier like clojure.java.io/resource, jio/resource etc.

There is also compliment.sources.resources/resources-by-prefix that unconditionally returns a list of matching resources given a prefix. This should be used in the middleware for cider-find-resource.

I wrote tests, but I can't test the client side, AC does't want to complete from a string, even though I did (setq ac-disable-faces nil). Someone with company-mode test please.

[expez]

Hot damn, that was quick! I can't see the code in the compliment repo, though.

[alexander-yakushev]

Pushed.

Also, @bbatsov and me decided in alexander-yakushev/compliment#24 to complete only resources that belong to the current project. Otherwise, classpath contains a lot of stuff even after you filter out classes and source files. Java jars themselves have plenty of images and other resources.

If you have better ideas how to include more resources but omit the cruft, please share.

[alexander-yakushev]

And sorry, I forgot to require the source, so it probably is not initialized. I redeployed 0.2.2-SNAPSHOT, please delete the old one and retry.