[Jython-users] command line history

[Raghuram D. <ra...@sy...>]

Hi,

After searching the web for jython command-line history support (on 
unix), I found couple of pointers but I needed to use both of them in 
some sense to get things to work. I am posting the steps I followed here 
in the hope that someone may find it useful. It may even be added to the 
FAQ. These are tested on Linux with jython 22.

1) download Java Readline library from 
http://sourceforge.net/projects/java-readline. (I tested with version 
0.8). You can download rpm or source files. It is very easy to build 
from source. A top level Makefile is provided. Ultimately, two files are 
required:

     *) libreadline-java.jar
     *) libJavaReadline.so

2) Make sure that these are accessible to jython. There are several ways 
to achieve it. I did it as follows:

     *) add <path-to-libreadline-java.jar> to "java -cp" argument in 
jython startup script.
     *) add <directory-containing-libJavaReadline.so> to 
LD_LIBRARY_PATH, again, in jython startup script.

3) edit the jython registry to have the following settings:

python.console=org.python.util.ReadlineConsole
python.console.readlinelib=GnuReadline

Thanks to all those who made this possible,
Raghu.