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Re: [Dragora-users] Proposal: flexible script to create different images


From: DustDFG
Subject: Re: [Dragora-users] Proposal: flexible script to create different images
Date: Thu, 12 May 2022 06:01:46 +0100

On Wed, May 11, 2022 at 10:51 PM Matias Fonzo <selk@dragora.org> wrote:
El 2022-05-11 15:45, DustDFG escribió:
> On Wed, May 11, 2022 at 5:38 PM Matias Fonzo <selk@dragora.org> wrote:
>
>> Hello DustDFG!,
>>
>> El 2022-05-10 14:29, DustDFG escribió:
>> >
>> > On Tue, May 10, 2022 at 1:47 PM Matias Fonzo <selk@dragora.org> wrote:
>> >
>> >> El 2022-05-10 01:32, DustDFG escribió:
>> >> > On Tue, May 10, 2022 at 1:12 AM Matias Fonzo <selk@dragora.org>
>> wrote:
>> >> >
>> >> >> El 2022-05-06 03:58, DustDFG escribió:
>> >> >> > Hello Matias!
>> >> >> >
>> >> >> > I am sorry for the delay
>> >> >>
>> >> >> No problem!
>> >> >>
>> >> >> > On Thu, Apr 28, 2022 at 7:00 PM Matias Fonzo <selk@dragora.org>
>> >> wrote:
>> >> >> >
>> >> >> > The size of the ISO matters, since we have to create the images for
>> >> >> >> several CDs, in 700mb maximum. To achieve this you have to adjust
>> or
>> >> >> >> change the output of the packages for the files containing the
>> build
>> >> >> >> orders. For example, the packages generated from 00-core.order
>> would
>> >> >> >> be
>> >> >> >> installed to /var/cache/qi/packages/cd1/ with the rest continuing
>> to
>> >> >> >> wrap their output for the next CD number. So from stage 2 you can
>> >> >> >> create
>> >> >> >> the images for the CDs. It also gives the possibility of doing
>> what
>> >> >> >> you
>> >> >> >> suggested before, once the packages are generated, they will be
>> >> >> >> available in the packages/ directory, when chrooting in, Qi can be
>> >> >> >> used
>> >> >> >> to install directly, for example. the core from
>> >> >> >> var/cache/qi/packages/cd1.
>> >> >> >>
>> >> >> >
>> >> >> > As I know, now qi has an `--outdir` command line option. It can't
>> give
>> >> >> > you
>> >> >> > several cd's by stripping size but you can easily move all packages
>> >> >> > from
>> >> >> > the 00-core.order to folder  var/cache/qi/packages/cd1
>> >> >> >
>> >> >>
>> >> >> Yes, and measure its size to see if it fits in 700 MB.  Other series
>> >> >> can
>> >> >> make up the "cd2" and so on...
>> >> >>
>> >> >
>> >> > It seems to me that qi mustn't do it. It seems to me that it must do
>> >> > something wrapper....
>> >>
>> >> Yes, from the 'build-for-release' script.
>> >>
>> >
>> > I understood that cdN must depend only on packages from it or other
>> > cd's
>> > with number lesser than N.
>> > Does the order files follow this idea?
>>
>> Right now the 'build-for-release' script proceed with all the order
>> files.  What I have in mind at the moment, is to process for example
>> "00-core.order" which would compose a CD (CD1), and see in the
>> following
>> orders, e.g "01-sound", "02-dict" and maybe "03-xorg" could compose
>> CD2...
>>
>
> OK. Now I want to know the difference between bootstrap stages and
> build-for-release.
> I can't understand. Why aren't they a one object?
>

I won't connect the whole bootstrap process including the
'build-for-release' process to the bootstrap, because currently the
release procedure is intended to be carried out by building absolutely
everything one by one with no parallel jobs for the compiler, then
moving the temporary system so that there is nothing stuck in the PATH
(to make sure), finally building the final system again with parallel
jobs to speed up the compilation and guarantee the circular
dependencies.  A procedure that takes many, many hours depending on the
type of machine you have.

With no parallel jobs? Why?

This is more for the maintainer who considers this as the last step
ready to be released to the free software public.

I understand it but these scripts looks like duplicates in some places...

>
>> >>>
>> >> >> >> Apart from this, my proposal is to create a rootfs, which you
>> unpack
>> >> >> >> directly, which is more direct and faster than having to install
>> >> >> >> packages one by one via Qi.
>> >> >> >>
>> >> >> >
>> >> >> >  It is something like `darkcrusade` compiler collection. I also
>> think
>> >> >> > that
>> >> >> > the rootfs can be a template for different image types (iso, qcow
>> ...)
>> >> >> > so I
>> >> >> > thought that the rootfs and the core image is one entity.
>> >> >> >
>> >> >> > It seems to me that it will be good to have an xx-bootstrap.order
>> that
>> >> >> > contains minimal system that you can run...
>> >> >>
>> >> >> For a minimal system it is needed to identify, mark or sub-categorize
>> >> >> the most essential packages required to run the system.
>> >> >>
>> >> >
>> >> > What do you propose?
>> >>
>> >> Well... the category of a package can be renamed to "essential", or
>> >> the
>> >> essential packages can be declared in a new order file.
>> >>
>> >> Alternatively for a minimal system you can make a new stage containing
>> >> the C library, the kernel, perl, graft and qi, the init system, and
>> >> maybe other packages like busybox plus utilities to make network or
>> >> internet available.
>> >>
>> >
>> > I almost like this idea :)
>> >
>> > I think that it is already almost done because the stage 1 produces a
>> > temporary
>> > system that looks like the core system or the rootfs. I think that
>> > creation
>> > of a new stage
>> > is a bit unnecessary action. I think that we really need to make a new
>> > `essential`
>> > order file (maybe with a new category with the same name) that contains
>> > only
>> > packages from the stage 1. It will permit not to change scheme of
>> > system
>> > building
>> > but it will give possibility to get rootfs or the core system.
>> > What do you think about it?
>>
>> Stage 1 provides software to build more software, for a minimal system
>> we don't need this, but a small system that can install the rest (or
>> the
>> desired available) binary packages, local or remote would be great.
>>
>> About a new order file for essential packages, sounds good.  I think
>> it
>> would also be a good idea to rename the category of those (super)
>> essential packages.  To identify them, to be able to search them more
>> easily, where maybe also the installer can offer such packages,
>> installation.
>>
>
> 00-essential.order, 01-core.order, 02-sound.order ...
>
> Move these packages to category essential: "The C library, the kernel,
> perl, graft and qi, the init system, and maybe other packages like
> busybox plus utilities to make network or internet available."
>
> Do you think about something like this?

Well, essential packages for building are one thing, and essential
packages that make the system run are another.  In this case, we would
have to differentiate them.
 
Yes, it would be good. I looked at category kernel and think that we can't move to
the hypothetical essential category because it will break kernel category...

I want to know why package can have only one category?

In the case of the alternative in a separate stage, this does leave it
on the side of the bootstrap process rather than the temporary system to
build the final system. In a hypothetical stage 3, this builds a minimal
running system which gives the possibility to install the packages for
the matching architecture.

I think that if it must be a new stage, it must have number 2.

Bootstrap process now:
stage 0 produces cross-compiler
stage 1 produces temporary system
The user enters to the system and manually installs packages
stage 2 produces iso images

It would be much better to have this scheme:
stage 0 produces cross-compiler
stage 1 produces temporary system
stage 2 produces minimal system by using qi from temporary system (not replacing temporary system)
The user enters to the system produced at stage 2 and manually installs other packages
stage 3 produces iso images

I want to say that if we produces minimal system, full system must be a superset of the minimal...

>> In one of your previous messages you write that rootfs can be an
>> > archive.
>> > You also pointed
>> > out that archive is much faster than installing qi packages one by one.
>> > But
>> > it can be produced
>> > by installing qi packages one by one into the system. After installing
>> > the
>> > packages you can
>> > archive filesystem and get the rootfs...
>>
>>


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