[ANN]: Introducing lein-try

[Ryan Neufeld]

Hey folks,

Don't you hate it when someone releases a cool new library and you have to go into a project and add an unwanted dependency just to try it out? Worse, maybe you decide to 'lein new delete-me' and add it there.

No more! Stop this madness. Use lein-try to quickly launch a REPL with new dependencies download automatically - inside of a project, or out.

Once you've dropped [lein-try "0.1.1"] in your ~/.lein/profiles.clj's :user :plugins key, simply copy-paste the leiningen-style dependency after "lein try". For example:

$ lein try [io.rkn/core.async "0.1.0-SNAPSHOT"]
nREPL server started on port 50472
REPL-y 0.2.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)

user=> (require '[clojure.core.async :as async :refer [timeout go <!]])
nil
user=> (go (<! (timeout 1000)) (println "Now we're cooking with channels."))
#<ManyToManyChannel clojure.core.async.impl.channels.ManyToManyChannel@3b43b598>
user=>

# one second later...

Now we're cooking with channels.

Wow, that's cool!

Find out more or contribute at https://github.com/rkneufeld/lein-try

-Ryan

[Steven Degutis]

Very handy! I have to admit, the lack of this functionality has kept me from trying out several libs. Looking forward to "trying" it out! ;)

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[xumingmingv]

cool！

发自我的 iPhone

[Brandon Bloom]

This is awesome! I've totally wanted this.

Unfortunately, I can't get it to work...

~ $ lein try '[clj-time "0.5.1"]'

nREPL server started on port 61689

REPL-y 0.1.10

Clojure 1.5.1

    Exit: Control+D or (exit) or (quit)

Commands: (user/help)

    Docs: (doc function-name-here)

          (find-doc "part-of-name-here")

  Source: (source function-name-here)

          (user/sourcery function-name-here)

 Javadoc: (javadoc java-object-or-class-here)

Examples from clojuredocs.org: [clojuredocs or cdoc]

          (user/clojuredocs name-here)

          (user/clojuredocs "ns-here" "name-here")

user=> (use 'clj-time.core)

FileNotFoundException Could not locate clj_time/core__init.class or clj_time/core.clj on classpath:   clojure.lang.RT.load (RT.java:443)

What gives?

[Steven Degutis]

It looks like you're not supposed to quote the arguments you pass it.

--

[Brandon Bloom]

Odd. I just assumed that the arguments were being joined by spaces, then clojure.core/read, rather than parsed as individual arguments.

Not all of us use Bash... square brackets are used for special patterns in Zsh.

Without quotes, the arguments are being interpreted in this way:

lein try '[clj-time' '"0.5.1"]'

That seems to work, but it a bit awkward to use.

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[Steven Degutis]

I think it also works with just: lein try clj-time 0.5.1, no quotes, no brackets.

[Daniel Dinnyes]

Well, that's the most convenient way it should work anyway, just a list of key, value, key, value, key, value argument list. Easy to implement. Accepting brackets is criminal.

[Sean Corfield]

This seems to work beautifully outside a project - and it's very
useful! I will no longer need to create a million scratch projects to
try stuff out - thank you!

However, inside a project, I can't get it to work.

(! 501)-> cd clojure
(! 502)-> lein try hiccup 1.0.2
nREPL server started on port 59442
...
user=> (use 'hiccup.core)
nil
user=> (html [:p "It works!"])
"<p>It works!</p>"
user=> Bye for now!

(! 503)-> lein new testproject
Generating a project called testproject based on the 'default' template.
To see other templates (app, lein plugin, etc), try `lein help new`.
(! 504)-> cd testproject
(! 505)-> lein try hiccup 1.0.2
nREPL server started on port 59477
...
user=> (use 'hiccup.ocre)
FileNotFoundException Could not locate hiccup/ocre__init.class or
hiccup/ocre.clj on classpath: clojure.lang.RT.load (RT.java:443)

user=>

Inside a project, it only seems to pick up the project's deps, not add
to them. Am I doing something wrong?

Sean

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--

Sean A Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/
World Singles, LLC. -- http://worldsingles.com/

"Perfection is the enemy of the good."
-- Gustave Flaubert, French realist novelist (1821-1880)

[Daniel Dinnyes]

Looks promising though. Pomegranate is significantly more complex, and I could never remember the name of the function which dynamically loads the libs.

[Daniel Dinnyes]

Also, I would call it repl-deps or repl-with-deps. Not as short, but who knows, maybe later on it will be merged into `repl` as some option argument; such naming would support that intention. It is more descriptive too. When I first saw the post I thought `lein try` will be about testing exception handling or something.

[Ryan Neufeld]

It looks like you tried to use hiccup.ocre instead of core

[Ryan Neufeld]

I use zsh too and have to prefix commands with noglob. Additional robustness and caveats documentation will be necessary.

Pull requests welcomed.

[Sean Corfield]

It doesn't work when I spell it correctly either (and I had done
several tests - but of course the results of misspelling it look the
same as it not working - and it's indicative of my day that I pasted
the result of a bad test! :)

C:\Users\Sean\clojure>lein new five
...
C:\Users\Sean\clojure>cd five
C:\Users\Sean\clojure\five>lein try hiccup 1.0.2
Retrieving lein-try/lein-try/0.1.1/lein-try-0.1.1.pom from clojars
Retrieving lein-try/lein-try/0.1.1/lein-try-0.1.1.jar from clojars
Retrieving org/clojure/clojure/1.2.1/clojure-1.2.1.jar from central
nREPL server started on port 51113

REPL-y 0.2.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)

user=> (use 'hiccup.core)
FileNotFoundException Could not locate hiccup/core__init.class or
hiccup/core.clj on classpath: clojure.lang.RT.load (RT.java:443)
user=> ^D
Bye for now!

C:\Users\Sean\clojure\five>cd ..
C:\Users\Sean\clojure>lein try hiccup 1.0.2
nREPL server started on port 51183

REPL-y 0.2.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)

user=> (use 'hiccup.core)
nil
user=> ^D
Bye for now!
C:\Users\Sean\clojure>

(and that's just to show it failing the same way on Windows 8 (with
GNU on Windows) as it does on Mac!)

Sean

On Sat, Jul 13, 2013 at 9:26 PM, Ryan Neufeld <ry...@thinkrelevance.com> wrote:
> It looks like you tried to use hiccup.ocre instead of core
>

[Ryan Neufeld]

Can you pop that in an issue on the project. In the mean time I'll see if I reproduce that problem.

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[Softaddicts]

After reading this thread, I think we need another plug in to try the try plugin
which in turn may fail which would trigger the need for another try plugin which ....

Isn't this recursive a bit ? :))))

Luc

Softaddicts<lprefo...@softaddicts.ca> sent by ibisMail from my ipad!

[Ryan Neufeld]

I figured there was a joke somewhere in there, but I just couldn't tease a good one out ;)

[Softaddicts]

Nice ... try :)

Luc

[Sean Corfield]

https://github.com/rkneufeld/lein-try/issues/3

Let me know if I can help with testing or provide any additional information.

Sean