Common Lisp as a Scripting Language, 2015 Edition

Post by ketralnis » Thu, Apr 16, 2015, 1:40 AM UTC

frou_dh wrote: post #7

I have my own scheme-esque language that I use for scripts. 16 of its 48 primitive procedures ~correspond to unix system calls (open, close, read, write, seek, select, stat, link, unlink, mkdir, lsdir, chdir, fork+exec, wait, sleep, exit). It was very instructive to work on, and using something I know inside out is a welcome relief from the uncertainty I feel when intuiting (ba)sh.

Post by andrewchambers » Thu, Apr 16, 2015, 1:49 AM UTC

dorfsmay wrote: post #11

sputnikus wrote: post #3

Earlier quoted context omitted.

Pixie[1] is also worth a look. It's Clojure-like scripting language written in RPython. [1] https://github.com/pixie-lang/pixie

Indeed pretty cool, clojure implemented in rpython!

Post by e12e » Thu, Apr 16, 2015, 2:20 AM UTC

whateveracct wrote: post #16

mark_l_watson wrote: post #2

I used Common Lisp from the mid 1980s until about 5 years ago when my customers wanted Clojure, if they wanted Lisp development done. I have never seriously used CL as a scripting language but for a while I was using Gambit-C Scheme for small compiled apps and command line tools. Gambit-C is very good for this purpose. BTW, Clojure is "out" for command line tools because of the JVM startup time but I have thought abo…

Nitpick, but Clojure's startup time isn't JVM startup time it's clojure.core startup time

  cat  Hello.java
  public class Hello {
    public static void main(String[] args) {
      System.out.println("Hello, world!"); }}
  eof

  javac Hello.java
  echo "Main-Class: Hello" > manifest.mf
  jar cvfm hello.jar manifest.mf Hello.class
  time java -jar hello.jar 
  Hello, world!

  real    0m0.153s
  user    0m0.132s
  sys     0m0.020s

  lein new hello
  cd hello
  # Pesty s-expressions, so hard to work with... ;-)
  cat  src/hello/core.clj
  (ns hello.core
    (:gen-class))
  (defn -main 
    "I don't do a whole lot."
    []
    (println "Hello, World!"))
  eof

  lein uberjar
  
  time java -jar target/hello-0.1.0-SNAPSHOT-standalone.jar 

  real    0m1.060s
  user    0m1.400s
  sys     0m0.040s

Post by rml » Thu, Apr 16, 2015, 2:41 AM UTC

dorfsmay wrote: post #13

frou_dh wrote: post #12

Earlier quoted context omitted.

Wanted to put my article-gleaned understanding of lisp to the test + get at the essence of what shebang-style unix scripting was about. Here is a reimplementation of "cat" in it: #!/usr/bin/env imp (def copy-out (proc (x) (let f (if (file? x) x (open x)) bytes (read default-chunk f) (if bytes (seq (write bytes stdout) (recur f)) (close f))))) (if (nil? script-args) (copy-out stdin) (each copy-out script-args)) Runnin…

> Wanted to put my article-gleaned understanding of lisp to the test fair enough! > get at the essence of what shebang-style unix scripting was about FWIW, although convoluted, you can do that with guile, with: #!/usr/bin/guile \ -e main -s Or simpler with chicken: #!/usr/bin/csi -s

Post by e12e » Thu, Apr 16, 2015, 2:55 AM UTC

e12e wrote: post #25

whateveracct wrote: post #16

Earlier quoted context omitted.

Nitpick, but Clojure's startup time isn't JVM startup time it's clojure.core startup time

This appears to be true, eg: cat Hello.java public class Hello { public static void main(String[] args) { System.out.println("Hello, world!"); }} eof javac Hello.java echo "Main-Class: Hello" > manifest.mf jar cvfm hello.jar manifest.mf Hello.class time java -jar hello.jar Hello, world! real 0m0.153s user 0m0.132s sys 0m0.020s vs: lein new hello cd hello # Pesty s-expressions, so hard to work with... ;-) cat src/hell…

  wget ftp://ftp.gnu.org/pub/gnu/kawa/kawa-2.0.jar
  wget ftp://ftp.gnu.org/pub/gnu/kawa/kawa-2.0.jar.sig
  gpg --recv-key D269E756
  gpg --verify kawa-2.0.jar.sig

  echo '(format #t "Hello, world!\n")' > hello.scm
  # Not sure how to bundle up a scheme script with kawa
  # to a stand-alone jar...
  java -jar kawa-2.0.jar --main -C hello.scm 
  time java -cp kawa-2.0.jar:. hello
  Hello, world!

  real    0m0.284s
  user    0m0.296s
  sys     0m0.020s