[9fans] Acme and the pipe command

[9fans] Acme and the pipe command

[Georg Neis]

Acme's man page says about Edit:
    Treat the argument as a text editing command in the style of sam(1).
    The full Sam language is implemented except for the commands k, n, q,
    and !.

However, it seems that sam's pipe command doesn't work.  For example,
    Edit ,|sort
removes all lines instead of sorting them.

Thanks to Uriel I now know that acme has its own | command.  But why this
exception?  It's even undocumented.

Regards,
Georg

Re: [9fans] Acme and the pipe command

[Gabriel Diaz]

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Hi

It works for me.

If i put a number on each line and then Edit ,|sort -n i get numbers sorted.
(you need to have the last line with a \n to avoid an error message from
sort)

Gabi


2005/11/5, Georg Neis <gn@oglaroon.de>:
>
> Acme's man page says about Edit:
> Treat the argument as a text editing command in the style of sam(1).
> The full Sam language is implemented except for the commands k, n, q,
> and !.
>
> However, it seems that sam's pipe command doesn't work. For example,
> Edit ,|sort
> removes all lines instead of sorting them.
>
> Thanks to Uriel I now know that acme has its own | command. But why this
> exception? It's even undocumented.
>
> Regards,
> Georg
>

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Re: [9fans] Acme and the pipe command

[Rob Pike]

if the command fails for whatever reason (perhaps sort isn't in your
path), then the output will be empty and the command will delete
all the text. a message will appear in the +Errors window and you
can undo to recover the text and figure out what went wrong.

but | is implemented, i assure you.

-rob

Re: [9fans] Acme and the pipe command

[Russ Cox]

>     Edit ,|sort
> removes all lines instead of sorting them.

This is true of the plan9port version, for reasons I've
never tracked down.  They have something to do
with the fact that, because of the way fsopenfd is
implemented, the command can exit before the
output has been received by acme.  I'm not sure why
Edit | doesn't work but regular | does.

On Plan 9, they both work fine.

> Thanks to Uriel I now know that acme has its own | command.  But why this
> exception?  It's even undocumented.

I am surprised, but you seem to be right that the |, <, and >
commands in acme are undocumented.  (> is like pipe
but the output goes to +Errors instead of replacing the
selection.  < replaces the selection but does not send it
to the command.)  These predate Edit by many years.

Russ

Re: [9fans] Acme and the pipe command

[Georg Neis]

Thanks so much for all the replies.  I'm sorry for not having mentioned
that I'm using plan9port's acme.

Btw: there's an invalid entry "acme.1" on
http://plan9.bell-labs.com/sys/man/1/INDEX.html

Regards,
Georg

Re: [9fans] Acme and the pipe command

[Russ Cox]

Fixed, thanks.

On 11/6/05, Georg Neis <gn@oglaroon.de> wrote:
> Thanks so much for all the replies.  I'm sorry for not having mentioned
> that I'm using plan9port's acme.
>
> Btw: there's an invalid entry "acme.1" on
> http://plan9.bell-labs.com/sys/man/1/INDEX.html
>
> Regards,
> Georg
>