[9fans] Re: \n\n\n to \n\n

[9fans] Re: \n\n\n to \n\n

[peter a. cejchan]

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> however, sed doesn't like long lines 
> you could do it in sam: s/\n\n\n/\n\n/g

finally, i did it using acme's Edit. Thanks!


I just wonder why Edit is a built-in... I would prefer piping to (streamed) sam...
wouldn't that be a cleaner solution? One of the things I love on unix/plan 9 is their modularity, thus,
why to have a standalone webbrowser when there is acme + hget + gif (page),
likewise with mail,
and why to have a built-in Edit when there is acme + sed (ssam, awk, perl....)?
Or am I missing something?

Thanks,
++pac

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Re: [9fans] Re: \n\n\n to \n\n

[rob pike, esq.]

> I just wonder why Edit is a built-in... I would prefer piping to (streamed) sam...
> wouldn't that be a cleaner solution?

First, there isn't a streamed sam, and second, streaming only works
for one file.  Second, you *can* stream text through commands; I do it
all the time.  (|fmt, |sort, |tr A-Z a-z, etc.  etc.)

But to answer your question: I find the X command extremely powerful,
and can't see any way to have a streaming implementation that will
look at multiple files simultaneously.

One day I realized I could easily implement Edit as a command in acme,
but that after about fifteen years of desultory thought I still didn't
see the right way to build a stream sam.  The X command was the
clincher, and I started hacking.

-rob

[9fans] Re: \n\n\n to \n\n

[peter a. cejchan]

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>  And of course you can always wrap sam in a script just to
>  pretend that you have ssam.

could someone show me , how?

sorry for ignorance,
++pac

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Re: [9fans] Re: \n\n\n to \n\n

[Fco.J.Ballesteros]

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This is naive and dirty but it's what I use:

I pass different `command lines' to sam by using different
arguments. It can be done better for sure but I didn't bother.

hth

#!/bin/rc
t=/tmp/ssam.$pid

fn exit () {
	rm -f $t
}
cat > $t
{
	for (c in $*)	echo $c	
	echo q
} | sam -d $t >[2] /dev/null
rm -f $t


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>  And of course you can always wrap sam in a script just to
>  pretend that you have ssam.

could someone show me , how?

sorry for ignorance,
++pac

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Re: [9fans] Re: \n\n\n to \n\n

[rog]

> >  And of course you can always wrap sam in a script just to
> >  pretend that you have ssam.
>
> could someone show me , how?

the following script does something of the sort; if you were prepared
to go without error messages, you could dispense with the clunky sed
script.

unfortunately it produces output even if there's an error in the
script.  i don't know if there's anything that can be done about
that...

use like:

	echo hello | ssam ',x/l/c/x/'

it's only had 'presotto' testing...

#!/bin/rc
{
	{
		for (i) echo $i
		echo w /fd/1
	} |
	sam -d /fd/3 |[2]
	sed -e '/^\?changed files/d' -e '/^[^?]/d'  -e 's/\?/ssam: /' >[1=2]
} <[3=0]

[9fans] Re: \n\n\n to \n\n

[peter a. cejchan]

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>> I just wonder why Edit is a built-in... I would prefer piping to (streamed) sam...
>> wouldn't that be a cleaner solution?

>  First, there isn't a streamed sam, and second, streaming only works
>  for one file.  Second, you *can* stream text through commands; I do it
>  all the time.  (|fmt, |sort, |tr A-Z a-z, etc.  etc.)

So do I. I was just curious why there is a built-in Edit instead of having "a better sed" ... I thought of Acme
as of an environment (say, glue), not a text teditor. Would love to have Plan 9 like a "LEGO" (TM), and more: single 
piece for every "task".... maybe stupid, but I would love sed with capabilities of Edit...

PS: I'm going to test the posted wrappers to Sam, and then, hopefully, forget of Edit, and |sed   ;-)
++pac

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Re: [9fans] Re: \n\n\n to \n\n

[Douglas A. Gwyn]

peter a. cejchan wrote:
> PS: I'm going to test the posted wrappers to Sam, and then, hopefully, 
> forget of Edit, and |sed   ;-)

The main advantage of sed is that it can process in a truly
streaming fashion, whereas sam, ed, etc. all have to see the
end of file on the input before any editing can be done to
the file.

Re: [9fans] Re: \n\n\n to \n\n

[Fco.J.Ballesteros]

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I using all of Edit, sed, ssam. Depending on the kind of task
I use one or another. So, let's not forget Edit :-)

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From: "Douglas A. Gwyn" <DAGwyn@null.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Re: \n\n\n to \n\n
Date: Fri, 7 Mar 2003 11:14:05 GMT
Message-ID: <3E67E3AD.1010209@null.net>

peter a. cejchan wrote:
> PS: I'm going to test the posted wrappers to Sam, and then, hopefully, 
> forget of Edit, and |sed   ;-)

The main advantage of sed is that it can process in a truly
streaming fashion, whereas sam, ed, etc. all have to see the
end of file on the input before any editing can be done to
the file.