On Wed, Feb 1, 2012 at 3:39 AM, Frank Siebenlist
<frank.siebenl...@gmail.com> wrote:
> We already have swank, lein repl, cake, nrepl, detour, clj, reply, … and now
> we have the combo "cljsh & repls".
>
> "repls" is a lein plugin, which is essentially leiningen's native "lein repl"
> task with some default config options for the (not-)printing of eval results
> and repl-prompt. It gives you a persistent repl-server that uses the basic
> repl-protocol: clj-code as text for the reader thru stdin, and evaluated
> results and printed side-effects thru stdout. Install it with "lein plugin
> install lein-repls 1.6.0", and run the repl-server in your project directory
> with "lein repls", and just leave it running...
>
> "cljsh" is a "clojure shell" bash-script that uses "socat" under the covers
> to make the repl-server's stdin and stdout appear local to cljsh. It allows
> for a relatively simple sending of clj-statements and clj-files to the
> persistent repl-server. cljsh is also very lightweight, like cake/nailgun,
> with a negligible startup time, which makes the evaluation of much of your
> clj-code almost instant. You run cljsh like a normal shell script, like bash
> or sed, and pass clj-code statements and files as command line directives or
> piped-in thru stdin. That code is sent to the persistent repl-server, and the
> printed results and output are available on cljsh's stdout. Almost sounds too
> simple… Download the cljsh script from github:
> "https://raw.github.com/franks42/lein-repls/master/bin/cljsh.sh"; and put it
> somewhere in your path. An example command line invocation looks like:
>
> $ cljsh -c '(println "hello")'
> hello
> $
>
> or a more contrived example:
>
> $ cat third.clj | cljsh -c '(println "first")' -i second.clj - fourth.clj
> -myargs
>
> The cljsh-test.sh script shows most of the supported features:
> "https://github.com/franks42/lein-repls/blob/master/bin/cljsh-test.sh";.
>
> cljsh also supports an interactive repl-mode with history and completion
> support thru rlwrap - pretty much like the other repls, except that this one
> starts-up instantly, and you can have multiple, concurrent repl-sessions
> working with the same persistent repl-server. (not sure why you would do
> that… but you can/could… ;-)). The completion words can easily be updated
> with cljsh to reflect the evaluation context, but remember that rlwrap is a
> poor-man's completion solution… even though it works pretty well most of the
> time.
>
> Possible usage scenarios.
> Easy to write cljsh-scripts that can be used to select code in any text
> editor or any app and send for evaluation. Select any symbol in any
> app/browser and lookup the doc. Use growl notification to show you the doc or
> the stack trace or eval result. Write your clj-based unix filter. Browse the
> filesystem with fs by changing the repl-prompt to reflect your cwd. Write
> your clj-based macosx automation service. Please let me know if you come up
> with any others…
>
> Even though it all seems to work pretty well on my macosx… your mileage may
> vary on the other unixes, and it most probably won't work on windows… maybe
> cygwin(?). Please let me know of any compatibilty issues.
>
> Next step: extend it to support clojurescript. (…driving a browser UI thru
> unix-style filters and scripts from the command line…)
>
> Please take a look at the README at: "https://github.com/franks42/lein-repls";
> for details.
> Any feedback is very much appreciated.
>
> Enjoy, FrankS.
Just tried it. This is what I have in Ubuntu
petr@host:~$ lein repls
Exception in thread "main" java.lang.Exception: Couldn't connect
(NO_SOURCE_FILE:0)
at clojure.lang.Compiler.eval(Compiler.java:5440)
at clojure.lang.Compiler.eval(Compiler.java:5391)
at clojure.core$eval.invoke(core.clj:2382)
at clojure.main$eval_opt.invoke(main.clj:235)
at clojure.main$initialize.invoke(main.clj:254)
at clojure.main$script_opt.invoke(main.clj:270)
at clojure.main$main.doInvoke(main.clj:354)
at clojure.lang.RestFn.invoke(RestFn.java:457)
at clojure.lang.Var.invoke(Var.java:377)
at clojure.lang.AFn.applyToHelper(AFn.java:172)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.main.main(main.java:37)
Caused by: java.lang.Exception: Couldn't connect
at leiningen.repls$poll_repl_connection.invoke(repls.clj:129)
at leiningen.repls$repls.invoke(repls.clj:184)
at leiningen.repls$repls.invoke(repls.clj:155)
at clojure.lang.Var.invoke(Var.java:361)
at clojure.lang.AFn.applyToHelper(AFn.java:159)
at clojure.lang.Var.applyTo(Var.java:482)
at clojure.core$apply.invoke(core.clj:540)
at leiningen.core$apply_task.invoke(core.clj:260)
at leiningen.core$_main.doInvoke(core.clj:325)
at clojure.lang.RestFn.invoke(RestFn.java:410)
at clojure.lang.AFn.applyToHelper(AFn.java:161)
at clojure.lang.RestFn.applyTo(RestFn.java:132)
at clojure.core$apply.invoke(core.clj:542)
at leiningen.core$_main.invoke(core.clj:328)
at user$eval42.invoke(NO_SOURCE_FILE:1)
at clojure.lang.Compiler.eval(Compiler.java:5424)
... 11 more
And runnung cljsh.sh gives
petr@host:~$ cljsh.sh -c '(println "hello")'
/home/petr/bin/cljsh.sh: 20: Syntax error: "(" unexpected
--
Petr Gladkikh
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