Clojure REPL > Remote > Use Leiningen Port does nothing

[Dennis Schridde]

Hi!

I am trying to setup a connection to a remote REPL in Cursive, but nothing
happens when I try to connect. I assume this is a bug in Cursive.

1. In the top right corner of the IntelliJ IDEA window, select "Edit
Configurations"
2. Click the green plus
3. Select "Clojure REPL" > "Remote"
4. Select "Use Leiningen Port"
5. Click "OK"
6. In the top right corner of the IntelliJ IDEA window, make sure to select
the new configuration and then click the green start button to "Run selected
configuration"
7. See that nothing happens; not even an error message or warning is shown

Instead I would expect the REPL-pane to pop up on the right side of the
window, or an error message to appear in the Event Log of the IDE.

In project.clj, I have the following options set (excerpt):

:ring {:nrepl {:start? true
:port 9998}}
:repl-options {:port 9998}

When I run `lein repl :connect` on the command line, the REPL is shown,
without an error messages or warnings:

# lein repl :connect
Connecting to nREPL at 127.0.0.1:9998
REPL-y 0.3.7, nREPL 0.2.12
Clojure 1.8.0
...

When I enter the hostname and port manually (i.e. select "Connect to server"
instead of "Use Leiningen REPL"), I do see the REPL-pane popping up on the
right side of the IDE window. I can then enter commands there and get a
reply.

Versions:
* Cursive: 1.6.1-2017.2
* JetBrains IntelliJ IDEA: 2017.2.2

If you need any additional information, please do not hesitate to ask.

--Dennis

[Daniel Compton]

Hi Dennis

From my understanding, Cursive picks up the port to use by looking for a ".nrepl-port" file. Is that present when you're trying to connect? Also, another thing that has caught me a few times is in a multi-module project, trying to connect to the wrong project.

Hope that helps, though I'm not sure if that's the issue.

--

Daniel.

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[Colin Fleming]

Hi Dennis,

Daniel is right that Cursive will determine the port from the .nrepl-port file. I suspect that the issue might be that lein doesn’t write that file out if you manually specify the port as you are doing, it’s possible that it’s only written when lein binds its server socket and receives an arbitrary port.

Let me know if that is in fact the issue, I’ll make sure that Cursive shows an error if that’s the case.

Cheers,
Colin

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[Dennis Schridde]

Hi!

On Dienstag, 22. August 2017 00:01:08 CEST Colin Fleming wrote:
> Daniel is right that Cursive will determine the port from the .nrepl-port
> file. I suspect that the issue might be that lein doesn’t write that file
> out if you manually specify the port as you are doing, it’s possible that
> it’s only written when lein binds its server socket and receives an
> arbitrary port.
>
> Let me know if that is in fact the issue, I’ll make sure that Cursive shows
> an error if that’s the case.

Indeed, there is no .nrepl-port file in the project folder.

Would it be possible to parse the port from [:nrepl-options :port] in
project.clj, if .nrepl-port is missing?

--Dennis

[Dennis Schridde]

Hi Colin!

Have you had a chance to look into this?

--Dennis