Re: first adventures

[Ray Andrews <rayandrews@eastlink.ca>]

On 10/26/2014 10:52 AM, Peter Stephenson wrote:


Peter, Bart:

First hints of traction:

> That's how it works for interactive shells. The lowest level of input 
> in the main shell is within input.c. Because zle is a separate library 
> that may be loaded at run time the interaction actually goes through 
> the function zleentry() in init.c, which ensures that either zle is 
> loaded or if it can't be there's some fallback to get the input 
> another way. ZLE_CMD_READ is the command to zleentry() that causes a 
> line to be read. shingetline() is the fallback for non-interactive 
> shells or if zle can't be loaded. va_end(ap);

At the bottom of zleentry():

     ///
     printf("FILE: %s LINE: %d\n", __FILE__, __LINE__);
     puts(ret);
         return ret;

   }

I get:

     $ !4562; ls zsh.*
     ls e*; ls zsh.*                        << exactly as typed, but 
with bangchar expanded.
     FILE: init.c LINE: 1535
     !4562; ls zsh.*                      << exactly exactly as typed :)

     (output)

... so, I finally have my gloriously, deliciously unexpanded, plain 
vanilla command, exactly as I
typed it. (BTW, 'cmd = -1' and this doesn't seem to be handled by 
'ZLE_CMD_READ' but nevermind.)
However, as Bart has explained, I really do want to be able to capture 
the bangchar/history thing expanded
line as well, precisely as shown by the shell anyway:

     ls e*; ls zsh.*                        << exactly as typed, but 
with bangchar expanded.

Where can I capture that output? AFAICT, that's exactly as it gets 
written to .histfile, so it should
be easy enough to intercept.

Finally, if we have several commands on one line, at some point the line 
must be chopped up
at the semicolons for execution, since each individual command only 
'gets' that part of the
line that applies to it.  How can that be done?  (I was speculating that 
if each command
could somehow know that it was (say) command #3 on that line, then one 
might very inelegantly
parse the .histfile line, counting semicolons, and chop it up that way, 
but how ugly is that.)