jython and emacs on windows

jython and emacs on windows

[jerome delachienne]

Hello,

i am trying to start a jython interpreter from emacs on windows from
several days and did not managed to do it.
I managed to start the jython interpreter from emacs on linux
I managed to start the python interpreter from emacs on windows.
with jython on windows i have the following problem: i can execute a
python script with the option -m but i can not interact with the
interpreter.
When i start from an eshell jython without the -i  option, nothing
happens as expected (like python)
When I start from an eshell the jython interpreter with -i option,  I
receive the "welcome" information and the prompt:
c:/Users/jerome $ jython -i
Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54)
[Java HotSpot(TM) Client VM (Sun Microsystems Inc.)] on java1.6.0_20
Type "help", "copyright", "credits" or "license" for more information.
>>>
but then the interpreter does not react to any inputs
on the process explorer i can see that emacs has started a child
process cmd /c c:\jython2.5.1\jython.bat -i. this child process
started itself the jython interpreter which runs.but it seems that the
inputs are not passed from emacs to the jython interpreter.

has anyone an idea how i could solve this problem? Thanks for your
help !

jython 2.5.1
Jdk 1.6.0_20
emacs 22.3 and 21.3
windows xp and 7

Re: jython and emacs on windows

[Tim Johnson]

On 2010-05-13, jerome delachienne <jerome.delachienne@googlemail.com> wrote:
<...>
> has anyone an idea how i could solve this problem? Thanks for your
> help !
>
> jython 2.5.1
> Jdk 1.6.0_20
> emacs 22.3 and 21.3
> windows xp and 7
 Jerome, I do not use Windows for programming any more. I don't know if
 the following will be of value:

 Several years ago, when I used emacs on windows, I found that when I
 attempted to start an asynchronous process (comint) from emacs, that
 process was loaded into a separate window. I.E. *not* asynchronous
 to the editor. I was told at that time that the way to make the
 comint mode work correctly was to compile emacs thru cygwin.

 I wish I could do more to help.

 regards
-- 
Tim 
tim at johnsons-web.com or akwebsoft.com
http://www.akwebsoft.com

Re: jython and emacs on windows

[Peter]

I have no idea (maybe I should stop here? :-)) what the problem may
be, but I use the Windows build of Emacs and run a Python interpreter
from within Emacs. Can you do that? I know that my setup uses bash to
start the Python interpreter (from the cygwin tools) as opposed to
using cmd.

*maybe* running Jython using bash instead of cmd may solve the
problem?

Just a thought :-)

Peter

On May 14, 8:41 am, Tim Johnson <t...@johnsons-web.com> wrote:
> On 2010-05-13, jerome delachienne <jerome.delachie...@googlemail.com> wrote:
> <...>> has anyone an idea how i could solve this problem? Thanks for your
> > help !
>
> > jython 2.5.1
> > Jdk 1.6.0_20
> > emacs 22.3 and 21.3
> > windows xp and 7
>
>  Jerome, I do not use Windows for programming any more. I don't know if
>  the following will be of value:
>
>  Several years ago, when I used emacs on windows, I found that when I
>  attempted to start an asynchronous process (comint) from emacs, that
>  process was loaded into a separate window. I.E. *not* asynchronous
>  to the editor. I was told at that time that the way to make the
>  comint mode work correctly was to compile emacs thru cygwin.
>
>  I wish I could do more to help.
>
>  regards
> --
> Tim
> tim at johnsons-web.com or akwebsoft.comhttp://www.akwebsoft.com

Re: jython and emacs on windows

[jerome delachienne]

thank for your help!

I will try with cygwin to check if it works.

Today i found out i can start jython from emacs without cmd. in eshell
i just write the full java command:

"C:\Program Files (x86)\Java\jre6\bin\java"  -Xmx512m -Xss1152k  -
Dpython.home="C:\jython2.5.1" -Dpython.executable="C:
\jython2.5.1\jython.bat" -classpath "C:\jython2.5.1\jython.jar"
org.python.util.jython -i

emacs then starts a child process which return on the eshell buffer
the following lines

Jython 2.5.1 (Release_2_5_1:6813, Sep 26 2009, 13:47:54)
[Java HotSpot(TM) Client VM (Sun Microsystems Inc.)] on java1.6.0_20
Type "help", "copyright", "credits" or "license" for more information.
>>>

this child process is running but i can not communicate with it. I
found out that emacs is sending the data to a pipe (as far as i
understood). but jython is never reading the data from the pipe

I have tried other applications to check the communications between
emacs and its subprocesses:
i can start a python interpreter from emacs and i can communicate with
it without problem
I have written a small application in java which writes on the outputs
the inputs it has received. it works started from emacs.

it seems for me that the emacs subprocesses communications work fine.

I was thinking it was an end of line problem but it seems that jython
is never reading any data from the pipe.

i ll try jython with cygwin to check if the interactive mode is
working with cygwin.

regards

Re: jython and emacs on windows

[jerome delachienne]

I have tried with cygwin and i have exactly the same problem. jython
has started but it is not possible to communicate with it.

I was thinking of a end of line problem : i tried different codecs to
encode the output from emacs ( with the process variables from emacs).
I also changed  the decoding codec from jython with -C option but the
problem still remains.

to make it more complicated, i manage to start jython from emacs in
cygwin but only when I start emacs with nw option ( no window).

i think i have to surrender