#clojure – 2008-05-31

2008-05-31

14:53	Lau_of_DK	Evening
14:53	jgracin	hi!
14:54	Lau_of_DK	I'm in the process of transitioning from SBCL -> Clojure. Is somewhere here willing to give a few pointers on the subtle differences in emacs? :)
14:54	jgracin	you mean in using SLIME?
14:55	Lau_of_DK	No, its basically some of the changes in how the hot-keys work. I have a REPL loop running, and then in a seperate frame I have my sourcefile, which works with indentation and all that. But in SBCL I could press F8 to compile my entire file, and then execute the needed functions in the REPL - How do I do that in Clojure ?
14:57	jgracin	have you installed clojure-mode for Emacs?
14:57	Lau_of_DK	yes, I installed the advanced one
14:57	Lau_of_DK	(brb)
15:01	jgracin	I don't know if there's a default key binding for "evaluate-buffer" in clojure-mode. I haven't found it. But the Clojure menu contains "Evaluate region". That's what I use.
15:02	jgracin	I haven't started writing any serious code in Clojure yet, so I didn't bother to setup all the key-bindings.
15:03	Chouser	yeah, I'm still concentrating on humorous code.
15:06	jgracin	Clojure really raised my hopes of ever using Lisp in my daytime job. Common Lisp is a bit of a tough sell in that regard.
15:06	jgracin	Not only because of JVM...
15:08	drewr	C-c C-k.
15:09	drewr	Compile buffer... just like CL.
15:09	jgracin	drewr: nope. Not in my Emacs.
15:10	drewr	Hm.
15:10	jgracin	using clojure-mode by J.Chu
15:10	drewr	It works for me. Do you have an inferior-lisp hooked up to the buffer?
15:10	jgracin	yes
15:10	drewr	The status bar should read "(Clojure Slime ...)".
15:11	jgracin	oh, there we are. I'm not using Slime with Clojure.
15:11	drewr	Look into the swank-clojure goodness.
15:12	jgracin	What's the state of Clojure Swank?
15:13	Lau_of_DK	back
15:13	Lau_of_DK	Lemme try CompileRegion and C-c C-k
15:14	jgracin	Lau_of_DK: I haven't given Clojure Swank a chance, and it seems I should have. Off to install it...
15:14	Lau_of_DK	Hehe, lemme know how it goes
15:15	Lau_of_DK	Compile Region seems to work well enough
15:15	drewr	It works great. Not quite as full-featured as CL, but makes dev a lot more fun.
15:15	Lau_of_DK	define fun?
15:16	jgracin	I used to hang out in SLIME on SBCL quite a lot...
15:16	drewr	Lau_of_DK: The kind of interaction you have between a buffer and the REPL, same as SBCL.
15:17	drewr	You can't introspect objects yet though. Not sure how that would work, but I guess it's possible.
15:17	Lau_of_DK	k
15:21	Lau_of_DK	Do all of you guys use the Emacs/Slime/Clojure setup ?
15:26	Lau_of_DK	drewr, Could you please tell me exactly how you mimic the SBCL/Repl setup with Clojure - As is, I cant get them to interact. I start Emacs, split buffers (C-x 2), in one I do M-x run-lisp, in the other I load my .clj file.
15:46	Lau_of_DK	ok, maybe not drewr ... anybody? :)
15:47	jgracin	Lau_of_DK: I'm trying to setup slime with clojure at the moment. I hope I make it work soon.
15:49	jgracin	when I start slime, clojure throws exception about progn not being defined. Slime tries to eval a block of CL code in Clojure.
16:01	drewr	Lau_of_DK: First start SLIME with M-- M-x slime RET.
16:02	drewr	The instructions are in the comments of the elisp files.
16:05	jgracin	drewr: should variable slime-lisp-implementations contain full path to the script that starts clojure JVM? I have set it to '((clojure "/home/gracin/software/clojure.sh")) where clojure.sh is my script which starts Clojure REPL.
16:06	jgracin	i.e. '((clojure ("...")))
16:12	Lau_of_DK	it needs to be full path to the clojure.jar file
16:12	Lau_of_DK	everything else (which is only java?) should be on your path
16:13	drewr	Sorry, the swank-clojure.clj has the instructions.
16:13	Lau_of_DK	oh this is weird. If I start emacs and (M-x run-lisp) then I get a working REPL - but if I M-x slime, then it gives me the same error that jgracin got
16:13	drewr	Lau_of_DK: M-- M-x slime RET clojure RET
16:13	drewr	The prefix arg is significant.
16:14	Lau_of_DK	What is M-- ?
16:14	jgracin	Lau_of_DK: run-lisp starts inferior-lisp, AFAIK, it does not start slime.
16:14	Lau_of_DK	true
16:14	drewr	M-- is meta-dash.
16:15	drewr	M-- runs the command negative-argument.
16:16	jgracin	drewr: when you start slime, what's in the first line of inferior-lisp buffer? I get a Common Lisp expr (progn (load "...")...) which cannot be evaluated in Clojure.
16:16	drewr	You're still running CL.
16:16	drewr	swank-clojure.clj should be executed.
16:17	jgracin	should I copy that file to Slime install dir_
16:17	jgracin	?
16:17	jgracin	Do I have to patch slime installation?
16:17	Lau_of_DK	drewr, can you give me the exact keystrokes for M-- M-x slime RET clojure RET ? I tried M-x slime<return>, which gives me the progn error that jgracin got, then M-x clojure, which doesnt exist, only had clojure-mode
16:19	drewr	Lau_of_DK: Type the ALT key, hold it down, then hit the minus key.
16:19	drewr	The do M-x slime RET et.c
16:20	Lau_of_DK	Ah ok - new trick :)
16:20	Lau_of_DK	Alt + (-) + M-x slime RET => then it promps "Lisp name:" then I typed Clojure, and it says "no match"
16:21	drewr	OK, that's progress.
16:21	Lau_of_DK	:)
16:21	drewr	brb
16:21	Lau_of_DK	I also dont have the swank-clojure.clj file you mentioned.
16:22	Lau_of_DK	I installed the advanced-emacs thing, which is .el files I think, and then I unzipped the Clojure stuff, which was the .jar ile, and some sources
16:23	Lau_of_DK	drewr, you cant just go man, your my lifeline :)
16:24	jgracin	Lau_of_DK: you have to get it via git from http://clojure.codestuffs.com/
16:24	jgracin	Lau_of_DK: and where is this "advanced-emacs"?
16:24	Lau_of_DK	hang on
16:24	Lau_of_DK	http://clojure.codestuffs.com/pub/clojure-emacs.git/
16:25	Lau_of_DK	You can get it from here
16:25	Lau_of_DK	wait
16:25	Lau_of_DK	its moved :)
16:25	Lau_of_DK	git clone git://github.com/jochu/clojure-mode.git
16:25	Lau_of_DK	do that
16:25	drewr	There's also swank-clojure. Separate project.
16:25	drewr	Git that too.
16:27	Lau_of_DK	argh :)
16:27	Lau_of_DK	I think that link I gave you, that has settings you need to integrate into your .emacs
16:27	drewr	Once you git it, read the comments in swank-clojure.clj.
16:27	Lau_of_DK	I'm on it
16:28	Lau_of_DK	But let me just get this straight. Swank is the REPL server, and swank-clojure modifies it to evaluate clojure-code then ?
16:28	Lau_of_DK	http://github.com/jochu/swank-clojure/tree/master <-- This the one you guys are using?
16:29	drewr	Swank is a protocol that lets you communicate with the REPL.
16:29	drewr	Jeffrey Chu wrote the clojure code to speak the protocol so you can use SLIME.
16:30	Lau_of_DK	What provides the server then ?
16:31	drewr	Clojure.
16:31	drewr	The REPL is still Repl.java underneath.
16:32	Lau_of_DK	ah ok.. thanks for clearing that up
16:32	Lau_of_DK	I'm looking through the swank-clojure now
16:34	jgracin	Lau_of_DK: got it!
16:34	Lau_of_DK	you got it working? :)
16:34	jgracin	yup.
16:34	Lau_of_DK	alright, I'm right behind you ( I hope )
16:35	jgracin	(setq slime-lisp-implementations '((clojure ("/home/gracin/software/clojure/compiler/start.sh") :init clojure-init)))
16:35	jgracin	the point was in :init clojure-init
16:37	Lau_of_DK	that goes anywhere in my .emacs ?
16:38	jgracin	I'll show you what I have in my .emacs that's related to slime/clojure....
16:39	Lau_of_DK	Did you get that bit about the sh script ? Their .git seems to be down for the extras
16:39	jgracin	You probably don't need it. Try without it first.
16:39	jgracin	I didn't use it.
16:42	Lau_of_DK	argh, dont tell me that after I got it working :)
16:43	Lau_of_DK	Gimme 5 minz, I think I'm on the right track
16:44	jgracin	Lau_of_DK: Here's the part of my .emacs file which has to do with SLIME and Clojure setup. http://www.inge-mark.hr/~gracin/myemacs
16:45	Lau_of_DK	Thanks alot
16:45	jgracin	np
16:48	Lau_of_DK	the start.sh that you execute, what is that?
16:49	Lau_of_DK	also - its in /clojure/compiler/ - where did you get that lib from ?
16:55	Lau_of_DK	come on jgracin , dont leave me hanging baby :)
17:02	jgracin	Lau_of_DK: sorry. start.sh is my script that contains ...
17:02	jgracin	java -cp clojure.jar clojure.lang.Repl
17:02	jgracin	make the script executable
17:03	Lau_of_DK	where did you get the lib /compiler/ from ? Made it yourself, or is it because youre using a different package than me?
17:03	jgracin	clojure/compiler is where I keep the Clojure sources
17:04	jgracin	that's where I generated clojure.jar from Clojure sources
17:04	Lau_of_DK	oh, you compiled it yourself? It was in the package I downloaded
17:05	jgracin	yes, I compiled it myself. You can use whatever you've got. The point is that it must start Clojure REPL.
17:06	Lau_of_DK	sure, but this is weird. I added all your emacs stuff to the bottom of my .emacs file, and then I modified all the paths to fit my setup, start emacs. First if gives me some kind of error that it quickly hides. Then I hit M-- and then M-x slime RET - Then it says [no match] ...?
17:08	jgracin	Place the point over slime-lisp-implementations and press "C-h v" and enter to see what the value of that variable is.
17:10	jgracin	My setup resets that variable so there are no other lisps. In that case, you can just use M-x slime RET, i.e. without M-- prefix argument for slime.
17:10	jgracin	brb
17:11	Lau_of_DK	place the point over..? There's nothing but an empty sheet... And its weird before we started. Everything worked fine, SLIME, SBCL.. Now even M-x slime, fails, says no match
17:16	Lau_of_DK	aha, the error that flashed was this: Symbol's value as variable is void: slime-lisp-implementations
17:19	jamii	Hi all. Is there a way to get the last evaluated expression in the REPL? It doesnt seem to be documented anywhere.
17:30	Lau_of_DK	If you get it running in emacs its ctrl+up
17:48	jgracin	Lau_of_DK: still there?
17:49	Lau_of_DK	jgracin, yea, didnt you get all my query messages?
17:49	jgracin	yeah, I did. Did you manage to set slime-lisp-implementations variable?
17:50	Lau_of_DK	I can tell you in a second
17:50	jgracin	Lau_of_DK: oops. sorry, I didn't see your private messages until now!
17:50	Lau_of_DK	I just got SBCL/Slime running again
17:50	jgracin	Let me read them.
17:50	Lau_of_DK	k
17:52	Lau_of_DK	could you double check our emacs file on http://www.inge-mark.hr/~gracin/myemacs I think there might be something wrong in it
18:48	ericthor	rhickey: since we are talking about the fast math lib, it appears to take a bit of time to load the clojure.jar.
18:48	rhickey	poll: it looks like I can make the fast math primitives polymorphic, so no need for separate flot/+, int/+, BUT, since some are unsafe, I need to distinguish from +,-,. I'm looking for a single prefic or very short namespace for the "fast" ops, something like !+, !-, ! !< etc?
18:50	ericthor	I have not isolated where the time is taking but, as you know, I'm using rather powerful boxes...it can be a bit frustrating when troubleshooting problems in a app....
18:51	ericthor	Have you seen this on your end?
18:52	rhickey	a couple of secs, not something I would focus on
18:58	drewr	rhickey: I like the ! prefix.
18:59	rhickey	alternatively, Java primitives would default to fast:
18:59	rhickey	user=> (+ (. Integer MAX_VALUE)(. Integer MAX_VALUE))
18:59	rhickey	-2
18:59	rhickey	unless coaxed to boxed:
18:59	rhickey	user=> (+ (num (. Integer MAX_VALUE)) (. Integer MAX_VALUE))
18:59	rhickey	4294967294
18:59	rhickey	literals are already boxed
19:00	rhickey	(+ 2147483647 2147483647)
19:00	rhickey	4294967294
19:01	Lau_of_DK	I'm trying to compile clojure from the SVN, but mvn cannot find my java installation. Its located in /usr/lib/jvm/java-6-sun-1.6.0.06/ - - What do I export my $JAVA_HOME to, to get this to work ?
19:01	rhickey	then just a single set of +/-/* etc
19:05	Lau_of_DK	keep sleeping, I fixed it
19:09	Lau_of_DK	anybody still up ?
19:10	Lau_of_DK	Look, I finally got Clojure to work in Emacs. But my joy was stopped instantly. Every time I press SPACE a buffer puffs up and say "Unable to resolve symbol: user" ...
19:10	Lau_of_DK	How do I stop this madness? :)
19:14	Lau_of_DK	anybody?
19:18	Lau_of_DK	Look, I finally got Clojure to work in Emacs. But my joy was stopped instantly. Every time I press SPACE a buffer puffs up and say "Unable to resolve symbol: user" ...
19:23	ericthor	rich: yesterday I grabbed the latest clojure and removed all the object.invoke stuff. I'm getting an error in the topological sort function:
19:24	ericthor	java.lang.NoSuchFieldError: EMPTY
19:24	ericthor	at clojure.fns.depends.top_sort__4859.invoke(depends.clj:201)
19:24	ericthor	at clojure.fns.depends.get_depends__4892.doInvoke(depends.clj:298)
19:25	ericthor	there is no reference to the EMPTY instance that I can see in my clojure code. I'm going to try and step into the clojure code...see if i can see what is happening.
19:32	Lau_of_DK	Look, I finally got Clojure to work in Emacs. But my joy was stopped instantly. Every time I press SPACE a buffer puffs up and say "Unable to resolve symbol: user" ...
19:54	rhickey	eric: what is at depends.clj line 201?
21:47	rhickey	SVN 887 is an interim checkin - DO NOT USE!