Re: [MP-d] Alternative to `SK_HOME'

[<tho...@ph...>]

Hi Stefan,

I have some general trouble with the  rich tree. If I want to use sever=
al different applications
using one  system tree, the  tree is a mixture of application dependant=
 info (e.g. SmartKom.ptp)
which our Philips start scripts  are always overwriting, system librari=
es, and other stuff.

Although probably  a major  task, I  would  argue to divide the tree in=
to 'static'  stuff like
scripts  and libraries, and dynamic configuration infos (e.g.  the  DTD=
).

Unfortunately I have  neither solved my access problems, nor will  I  h=
ave much time  till
the  end of the year  as I am dividing  my  time  between several proje=
cts. So I will not
be of much help for  some time, except raising issues  like above  :-(

Ciao,

Thomas

Dr. Thomas Portele                                Thomas.Portele@philip=
s.com
Philips Research Laboratories           Man-Machine Interfaces
Weisshausstrasse 2                               52066 Aachen, Germany
Phone: +49 241 6003-712                       Fax.: +49 241 6003-518


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               Stefan Merten <me...@df...>                   =
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Hi!

3 days ago Stefan Merten wrote:
> I'm wondering about a good alernative to `SK_HOME'.
...

My final conclusion was to have an uniform method consisting of two
steps:

* In general the pointer to the root of the system tree is a parameter
  to the `SmartKom' / `Multiplatform' script.

  This parameter would be given by an option. I think `-h'/`--home'
  is a good idea.

* The `SmartKom' / `Multiplatform' script sets environment variable
  `MP_HOME' so all subsequent processes inherit this value treating it
  as a constant pointing to the rich structure system tree.

  Any process needing access to the system tree can obtain it by the
  environment variable then. This needs no changes in existing
  software (beyond `SK'/`MP' changes).

  Of course the environment is modified by `SmartKom' /
  `Multiplatform' according to `local/SmartKom.env' /
  `local/Multiplatform.env' as usual.

As an alternative `MP_HOME' might be set in the environment. However,
I think a warning suggesting use of the respective option is a good
idea.

This allows for things like

             alias SmartKom 'Multiplatform --home $SK_HOME'

> Also we need to know which operations are actually affected by
> `SK_HOME'. Of course running a Multiplatform based system is strongly=

> affected by `SK_HOME'. The other main operation which comes to mind i=
s
> running `make'. Are there any more? Ah - debugging is an additional
> case. Some of the debugging tools need to run in the (correct)
> Multiplatform environment. Anything else?

Does anything else come to mind? In particular: Does any operation
come to mind where the concept outlined above may not work? What about
Windows?

I'll start changing `SK'/`MP' `smartkom'/`multiplatform' now in all
existing packages.


                                                                       =
  Gr=FC=DFe

                                                                       =
  Stefan

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