[R] suppress startup messages from default packages

[Martin Morgan]

On 07/15/2013 06:25 AM, Duncan Murdoch wrote:
> On 15/07/2013 8:49 AM, Andreas Leha wrote:
>> Hi Helios,
>>
>> "Helios de Rosario" <helios.derosario at ibv.upv.es> writes:
>>
>> >> Hi all,
>> >>
>> >> several packages print messages during loading.  How do I avoid to
>> > see
>> >> them when the packages are in the defaultPackages?
>> >>
>> >> Here is an example.
>> >>
>> >> With this in ~/.Rprofile
>> >> ,----[ ~/.Rprofile ]
>> >> | old <- getOption("defaultPackages")
>> >> | options(defaultPackages = c(old, "filehash"))
>> >> | rm(old)
>> >> `----
>> >>
>> >> I get as last line when starting R:
>> >> ,----
>> >> | filehash: Simple key-value database (2.2-1 2012-03-12)
>> >> `----
>> >>
>> >> Another package with (even more) prints during startup is
>> > tikzDevice.
>> >>
>> >>How can I avoid to get these messages?
>> >
>> >
>> > There are several options in ?library to control the messages that are
>> > displayed when loading packages. However, this does not seem be able to
>> > supress all the messages. Some messages are defined by the package
>> > authors, because they feel necessary that the user reads them.
>> >
>>
>>
>> Thanks for your answer.  When I actually call library() or require()
>> myself I can avoid all messages.  There are hacks to do that even for
>> the very persistent messages [fn:1].
>>
>> My question is how to suppress these messages, when it is not me who
>> calls library() or require(), but when the package is loaded during R's
>> startup through the defaultPackages option.
>
> You could try the --slave command line option on startup.  If that isn't
> sufficient, try getting the maintainer to change the package behaviour, or do it
> yourself.

In a hack-y way ?setHook and ?sink seem to work

 > setHook(packageEvent("filehash", "onLoad"), function(...) 
sink(file(tempfile(), "w"), type="message"))
 > setHook(packageEvent("filehash", "attach"), function(...) sink(file=NULL, 
type="message"), "append")
 > library(filehash)
 >

Martin

>
> Duncan Murdoch
>
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