Re: [gentoo-dev] Managing etc/* in an embbeded system

[Joakim Tjernlund]

On Thu, 2015-07-23 at 08:47 -0700, Zac Medico wrote:
> On 07/23/2015 12:46 AM, Joakim Tjernlund wrote:
> > On Wed, 2015-07-22 at 19:47 -0400, Ian Stakenvicius wrote:
> > >
> > > Sent from an iPhone, sorry for the HTML...
> > >
> > > > On Jul 22, 2015, at 5:38 PM, Rich Freeman <rich0@g.o> wrote:
> > > >
> > > > On Wed, Jul 22, 2015 at 8:05 AM, Joakim Tjernlund
> > > > <joakim.tjernlund@×××××××××.se> wrote:
> > > > >
> > > > > There can not be any manual merges after an SW update here.
> > > > >
> > > > > I started to look at INSTALL_MASK, what if I set INSTALL_MASK
> > > > > to point to all conf files I want to manage myself.
> > > > > Then /etc/inittab etc. will not be touched when updating init
> > > >
> > > > This sounds like overkill.
> > > >
> > > > If you've already installed a custom /etc/inittab, then when you
> > > > emerge init, it won't overwrite your inittab even if you don't change
> > > > anything in your portage config.  emerge won't touch any files in /etc
> > > > unless they don't already exist.
> > >
> > >
> > > ..AND have been modified.  IIRC if the hash of the config files match what they were when the package
> > > was
> > > previously emerged, then the files are updated aren't they?
> > >
> > > I expect that this is fine in the situation described, but it's worth knowing that a config file left
> > > unmodified may be replaced with a different vanilla config file later on.
> >
> > Sure, but what if I need to change a conf file in an installed system? Or rebuild a a system from scratch?
> > The user only runs a one SW update command to update an installed system in the field and cannot edit a
> > bunch
> > of files too. Especially when there are hundreds of systems sitting in remote locations.
>
> If you use the profile-bashrcs profile-formats setting [1], then your
> profiles can use package.bashrc to define post_src_install and/or
> INSTALL_MASK to remove unwanted config files from upstream packages.
> Then you can easily replace the upstream config files with config files
> installed by your own configurations installed by your own ebuilds.

Finally getting back to this after lots of distractions.
I cannot get profile-formats  = profile-bashrcs to work.
I have in metadata/layout.conf:
  masters = gentoo
  profile-formats = portage-2 profile-bashrcs 
then in profiles/tmv3-target-overlay/profile.bashrc:
  INSTALL_MASK=xxxx
Doing portageq envvar INSTALL_MASK just yields an empty line
I guess I am missing something here?