Re: GUILE_QUIET: need help with redirection

On Sun, Oct 06, 2024 at 07:13:02AM -0700, Matt Wette wrote:
> Hi All,
> 
> I'm working on an update to guile to output some messages (e.g.,
> auto-compile) to a new
> `current-info-port', which is set to stderr by default.   I also added
> update to output the
> welcome message, ending in "Enter `,help' for help.".   However, this breaks
> the
> `00-repl-server' test which is looking for that message.  The test forks
> guile and closes stderr,
> so it won't see the message ordinarily.   I tried to fix by setting
> `current-info-port' to
> `current-output-port'.   But that does not work.    I now see the welcome
> message printed to
> the screen during the test.   I guess the message is sitting in the stderr
> output buffer before
> the fork happens.   So, options are:
> 1) Leave welcome message as is, going to stdout.
> 2) Find a way to make 00-repl-server.test work.
> 3) Initialize current-info-port to stdout (ugly)
> 4) Add some other hook in system/repl/common.scm(repl-welcome) to deal with
> it (ugly)
> 
> Any ideas?

Hm. Tough question. I think what the test reminds us of is that
your default above (stderr) is a backward-incompatible change,
so I'd be very coutious about that. Who knows whose's code this
might break (besides the test).

So leaving `current-info-port' at stdout as default seems the
safest bet.

Perhaps a command-line option to set `current-info-port' to one
of several useful values (i.e. stderr, but also a void port)
might be helpful.

Cheers
-- 
t

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