Babashka supports running a REPL, a socket REPL and an nREPL server.
To start the REPL, type:
$ bb --repl
To get history with up and down arrows, use rlwrap
:
$ rlwrap bb --repl
To start the socket REPL you can do this:
$ bb --socket-repl 1666
Babashka socket REPL started at localhost:1666
Now you can connect with your favorite socket REPL client:
$ rlwrap nc 127.0.0.1 1666
Babashka v0.0.14 REPL.
Use :repl/quit or :repl/exit to quit the REPL.
Clojure rocks, Bash reaches.
bb=> (+ 1 2 3)
6
bb=> :repl/quit
$
Editor plugins and tools known to work with a babashka socket REPL:
-
Emacs: inf-clojure:
To connect:
M-x inf-clojure-connect <RET> localhost <RET> 1666
Before evaluating from a Clojure buffer:
M-x inf-clojure-minor-mode
-
Atom: Chlorine
-
Vim: vim-iced
-
IntelliJ IDEA: Cursive
Note: you will have to use a workaround via tubular. For more info, look here.
To start an nREPL server:
$ bb --nrepl-server 1667
Then connect with your favorite nREPL client:
$ lein repl :connect 1667
Connecting to nREPL at 127.0.0.1:1667
user=> (+ 1 2 3)
6
user=>
Editor plugins and tools known to work with the babashka nREPL server:
The babashka nREPL server does not write an .nrepl-port
file at startup, but
you can easily write a script that launches the server and writes the file:
#!/usr/bin/env bb
(import [java.net ServerSocket]
[java.io File]
[java.lang ProcessBuilder$Redirect])
(require '[babashka.wait :as wait])
(let [nrepl-port (with-open [sock (ServerSocket. 0)] (.getLocalPort sock))
pb (doto (ProcessBuilder. (into ["bb" "--nrepl-server" (str nrepl-port)]
*command-line-args*))
(.redirectOutput ProcessBuilder$Redirect/INHERIT))
proc (.start pb)]
(wait/wait-for-port "localhost" nrepl-port)
(spit ".nrepl-port" nrepl-port)
(.deleteOnExit (File. ".nrepl-port"))
(.waitFor proc))
To debug the nREPL server from the binary you can run:
$ BABASHKA_DEV=true bb --nrepl-server 1667
This will print all the incoming messages.
To debug the nREPL server from source:
$ git clone https://github.com/borkdude/babashka --recursive
$ cd babashka
$ BABASHKA_DEV=true clojure -A:main --nrepl-server 1667