On Sat, Oct 24, 2020 at 04:37:45PM +0200, Stefan Esser wrote:
> Am 24.10.20 um 09:48 schrieb Alex Kozlov:
> > On Fri, Oct 23, 2020 at 09:22:23AM +0000, Stefan Eßer wrote:
> > > Author: se
> > > Date: Fri Oct 23 09:22:23 2020
> > > New Revision: 366962
> > > URL: https://svnweb.freebsd.org/changeset/base/366962
> > > 
> > > Log:
> > >    Add search of LOCALBASE/share/calendar for calendars supplied by a 
> > > port.
> > >    Calendar files in LOCALBASE override similarily named ones in the base
> > >    system. This could easily be changed if the base system calendars 
> > > should
> > >    have precedence, but it could lead to a violation of POLA since then 
> > > the
> > >    port's files were ignored unless those in base have been deleted.
> > >    There was no definition of _PATH_LOCALBASE in paths.h, but verbatim 
> > > uses
> > >    of /usr/local existed for _PATH_DEFPATH. Use _PATH_LOCALBASE here to 
> > > ease
> > >    a consistent modification of this prefix.
> > You are hardcoding assumption that LOCALBASE = /usr/local. Please make it
> > overridable with LOCALBASE environment variable.
> This was a trivial change to get us going with calendars provided by
> a port (which has not been committed, yet - therefore there are no
> port-provided calendars, neither under /usr/local nor under any other
> PREFIX, as of now).

> I understand what you are asking for, but in such a case I'd rather
> think you want to rebuild FreeBSD with _PATH_LOCALBASE modified in
> paths.h.
The PREFIX != LOCALBASE and both != /usr/local configurations
are supported in the ports tree and the base for a long time, please see
https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/porting-prefix.html

If after this commit you need to rebuild base to use non-default 
LOCALBASE/PREFIX
it is pretty big regression and POLA.
 
> And I have made this a single instance that needs to be changed.
> Before my change there were 2 instances of /usr/local hard-coded
> in _PATH_DEFPATH - now you have to only change the definition of
> _PATH_LOCALBASE to adjust all 3 locations that use it.
I think you made situation worse, there were two stray hardcoded
string and now there is official LOCALBASE define which likely will be
used by other people in the future.
 
> If you can show me precedence of a LOCALBASE environment variable
> being used in the way you suggest, I'd be willing to make calendar
> use it.
Just an analogy from LOCALBASE make variable, perhaps CALENDAR_HOME
is a better name.
 
> But then I think a CALENDAR_HOME variable would be even more useful,
> since it would allow to search an additional user selected directory
> (and not just share/calendar within what you provide as LOCALBASE).
> 
> Regards, STefan
> 
> PS: If you are a source committer, you might even commit such a
>     change yourself. But I'd think it should be reviewed, and it
>     might be a good idea to wait until other changes (e.g. the
>     switch-over to port-supplied calendar files) have been worked
>     out.


-- 
Alex
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