Noob: Getting (re)started with Clojure on OS X

[Kenneth Reid Beesley]

I played happily with Clojure/leiningen several years ago, on OS X, but I'm having trouble getting restarted.

I have

macOS High Sierra Version 10.13.6

java version 1.8.0_05

and I just did

$ brew upgrade leiningen

(it confirms that I have leiningen 2.9.1 already installed)

and

$ brew install clojure

(I now have stable 1.10.0.414)

But then I try

$ lein repl

and get

WARNING: You have $CLASSPATH set, probably by accident.

It is strongly recommended to unset this before proceeding.

clojure.lang.Compiler$CompilerException: Syntax error compiling at (cider/nrepl.clj:1:1).

#:clojure.error{:phase :compile-syntax-check, :line 1, :column 1, :source "cider/nrepl.clj"}

 at clojure.lang.Compiler.load (Compiler.java:7647)

...

and

Caused by: java.io.FileNotFoundException: Could not locate clojure/tools/nrepl/server__init.class, clojure/tools/nrepl/server.clj or clojure/tools/nrepl/server.cljc on classpath.

 at clojure.lang.RT.load (RT.java:466)

...

********************

So, where am I going wrong?  How do I get back in the Clojure saddle on OS X?

Ken Beesley

[Sean Corfield]

Check what’s in your ~/.lein/profiles.clj file – that’s usually the cause of bizarre errors that people report with Leiningen.

 

Also check your environment variables: env|fgrep CLASSPATH

 

Per the warning, you probably want to remove whatever is setting that (from one of your shell’s dot files, perhaps?).

 

Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood

 

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From: clo...@googlegroups.com <clo...@googlegroups.com> on behalf of Kenneth Reid Beesley <krbe...@gmail.com>
Sent: Wednesday, March 13, 2019 9:47:24 AM
To: Clojure
Subject: Noob: Getting (re)started with Clojure on OS X

 

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[Kenneth Beesley]

Many thanks for the reply.

My ~/.lein/profiles.clj file looks like

{:user {:plugins [[cider/cider-nrepl "0.8.2"]]}}

What should it look like?

*****

I've used Java quite a bit, and my CLASSPATH is extensive.

It’s set in my ~/.bashrc

What’s my next step?

Best,

Ken

*******************************

Kenneth R. Beesley, D.Phil.

PO Box 540475

North Salt Lake UT 84054

USA

[Kenneth Beesley]

On 13Mar2019, at 10:19, Sean Corfield <se...@corfield.org> wrote:

Check what’s in your ~/.lein/profiles.clj file – that’s usually the cause of bizarre errors that people report with Leiningen.

Hello Sean,

Hah!  I changed my ~/.lein/profiles.clj from

{:user {:plugins [[cider/cider-nrepl "0.8.2"]]}}

to

{:user {:plugins [[lein-pprint "1.1.1"]]

        :dependencies [[slamhound "1.3.1"]]}}

and now ‘lein repl’ launches.

Anything else I should add to ~/.lein/profiles.clj ?

Many thanks!

Ken

[Mike Rodriguez]

[cider/cider-nrepl "0.8.2"]

is quite old. It looks like lein 2.9.1 (as of 2.8.2) uses a newer version of nrepl that requires cider-nrepl 0.18+ or something along those lines. 

In newer versions of cider, you may not need to include this plugin at all. I know that the "jack-in" commands of cider can do it automatically for you at least. If removing the dep works fine for your workflow, I'd stick with that. Less is more. :-P

[Nathan Fisher]

I would even argue against using central profiles. I think it obscures behavioural differences between machines and can impair reproducibility. Arguably better to have all deps in project where possible.

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[Sean Corfield]

With modern versions of CIDER, those dependencies are injected automatically (and with the correct version).

 

I would advise keeping as little as possible in your profiles.clj file – it’s possibly the number one cause of problems for Leiningen users because people forget they have some plugin or dependency in there and months later it conflicts with some new project they’re working on in weird ways.

 

Sean Corfield -- (970) FOR-SEAN -- (904) 302-SEAN
An Architect's View -- http://corfield.org/

"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood

 

---

From: clo...@googlegroups.com <clo...@googlegroups.com> on behalf of Kenneth Beesley <krbe...@gmail.com>
Sent: Wednesday, March 13, 2019 10:54:19 AM
To: clo...@googlegroups.com
Subject: Re: Noob: Getting (re)started with Clojure on OS X

 

[marcp...@gmail.com]

Had the same issue and solved updating cider-nrepl to 0.21.1 in my profile

clo...@googlegroups.com

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[R Aguilera]

I was having the same issue as above and deleting my `lein` folder in my root directory solved my issue. Thank you so much, I was about to give up learning Clojure.

clo...@googlegroups.com

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