[OE-core] some pedantic questions about layer.conf "best practices"

[Robert P. J. Day]

  updating a tutorial about writing a proper layer.conf file, so some
nitpicky questions about recommended style.

  first, when appending to BBFILES, is it recommended to explicitly
use separate wildcard patterns of "*.bb" and "*.bbappend", or just get
lazy and use "*.bb*"? i realize that, in the end, it makes no
effective difference; i just happen to prefer the more explicit
pattern; just wondering if anyone has any preferences on this either
way. (i did say "nitpicky.")

  next, what is best practice for naming a layer, since standards seem
to differ. if i create a layer named "meta-rday", i've seen standards
where the layer is "named" with one of:

  BBFILE_COLLECTIONS += "rday"
  BBFILE_COLLECTIONS += "meta-rday"
  BBFILE_COLLECTIONS += "rday-layer"

amusingly, some freescale layers bounce around:

  BBFILE_COLLECTIONS += "freescale-layer"
  BBFILE_COLLECTIONS += "fsl-arm"
  BBFILE_COLLECTIONS += "fsl-ppc"

even the meta-openembedded (sub)layers don't have a consistent style;
some examples, which show all three styles:

  meta-filesystems/conf/layer.conf:BBFILE_COLLECTIONS += "filesystems-layer"
  meta-initramfs/conf/layer.conf:BBFILE_COLLECTIONS += "meta-initramfs"
  meta-webserver/conf/layer.conf:BBFILE_COLLECTIONS += "webserver"

is there an encouraged style?

  finally, is it necessary to have LAYERDEPENDS include "core"? isn't
that automatic? how could you possibly have a viable build system
without the oe-core layer (unless this gives you the freedom to
replace it with a custom one, which i don't see the value of).

  i think that's it for now ... thoughts?

rday

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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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