[yocto] writeup on the mechanics of FILESEXTRAPATHS and bbappend files

[Rifenbark, Scott M]

Just a note here regarding which Yocto Project manuals to look at for the most current information.  Use the 1.4 manuals.  So for the FILESEXTRAPATHS variable description you should look at http://www.yoctoproject.org/docs/1.4/ref-manual/ref-manual.html#var-FILESEXTRAPATHS entry.  The description in this more recent manual may be lacking as well.  I will try and work on that going forward.

Also, the "poky-ref-manual" part of the name has been changed to a symlink for releases 1.3 forward.  This manual path for 1.3 on should direct the user to the manual whose location includes "ref-manual".

Scott

>-----Original Message-----
>From: yocto-bounces at yoctoproject.org [mailto:yocto-
>bounces at yoctoproject.org] On Behalf Of Robert P. J. Day
>Sent: Wednesday, April 17, 2013 8:12 AM
>To: Paul Eggleton
>Cc: yocto at yoctoproject.org
>Subject: Re: [yocto] writeup on the mechanics of FILESEXTRAPATHS and
>bbappend files
>
>On Wed, 17 Apr 2013, Paul Eggleton wrote:
>
>> On Wednesday 17 April 2013 10:24:42 Robert P. J. Day wrote:
>> >   a while back, i dug into how FILESEXTRAPATHS worked with respect
>to
>> > .bbappend files and i wrote it up, just updated it a bit here:
>> >
>> >
>http://www.crashcourse.ca/wiki/index.php/FILESEXTRAPATHS_and_bbappend_fi
>les
>> >
>> > do i have it about right? it seemed that the underlying details
>> > weren't really explained well in any of the current yocto docs, and
>i
>> > wanted something i could point students at.
>>
>> It looks OK to me although if you're going to point students at it I
>> might suggest moving the "don't look here!" stuff elsewhere ;)
>
>  yes, that's going to be updated with more examples ripped from the
>headlines. :-)
>
>> Also as I believe I mentioned before, FILESEXTRAPATHS adds not just
>> one directory but an "entire list of directories" is it allows
>> bbappend file path behaviour to match that of the recipe itself.
>
>  quite so. the reason i did that writeup is that, as i mentioned, i
>don't think the behaviour of FILESEXTRAPATHS is well explained. for
>example, the entry in the reference manual variable glossary here:
>
>http://www.yoctoproject.org/docs/1.2/poky-ref-manual/poky-ref-
>manual.html#var-FILESEXTRAPATHS
>
>doesn't even *hint* at the underlying behaviour, which i think is
>important to understand.
>
>rday
>
>--
>
>========================================================================
>Robert P. J. Day                                 Ottawa, Ontario, CANADA
>                        http://crashcourse.ca
>
>Twitter:                                       http://twitter.com/rpjday
>LinkedIn:                               http://ca.linkedin.com/in/rpjday
>========================================================================
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