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

[DustDFG]

On Mon, Jun 6, 2022 at 3:04 PM DustDFG <dfgdust@gmail.com> wrote:
>
> On Mon, Jun 6, 2022 at 12:31 PM Matías Fonzo <selk@dragora.org> wrote:
> >
> > El 2022-06-06 08:04, DustDFG escribió:
> > > On Sat, Jun 4, 2022 at 10:38 PM Matías Fonzo <selk@dragora.org> wrote:
> > >>
> > >> El 2022-06-03 23:52, DustDFG escribió:
> > >> > On Fri, Jun 3, 2022 at 4:46 PM Matías Fonzo <selk@dragora.org> wrote:
> > >> >>
> > >> >> El 2022-06-03 04:47, DustDFG escribió:
> > >> >> > On Thu, Jun 2, 2022 at 6:49 PM Matías Fonzo <selk@dragora.org> 
> > >> >> > wrote:
> > >> >> >>
> > >> >> >> El 2022-06-02 09:29, DustDFG escribió:
> > >> >> >> > Hello Matias!
> > >> >> >> >
> > >> >> >> > I apologize for coming back to this
> > >> >> >> >
> > >> >> >> > On Thu, Apr 28, 2022 at 7:00 PM Matias Fonzo <selk@dragora.org> 
> > >> >> >> > wrote:
> > >> >> >> >>
> > >> >> >> >> El 2022-04-27 04:12, DustDFG escribió:
> > >> >> >> >> > Hi,
> > >> >> >> >> >
> > >> >> >> >> >> No, I was talking about to modify the output of packages by 
> > >> >> >> >> >> default
> > >> >> >> >> >> (from Qi), but first I want to check if we can just include 
> > >> >> >> >> >> the
> > >> >> >> >> >> packages
> > >> >> >> >> >> in a ISO handling the category name in the packages, for 
> > >> >> >> >> >> e.g: all the
> > >> >> >> >> >> @core.tlz packages for the ISO (CD 1).
> > >> >> >> >> >
> > >> >> >> >> > I think that if we don't worry about size of this iso image, 
> > >> >> >> >> > it doesn't
> > >> >> >> >> > look like
> > >> >> >> >> > a problem because we can use 'find' utility. I still can't 
> > >> >> >> >> > understand
> > >> >> >> >> > what
> > >> >> >> >> > you
> > >> >> >> >> > mean. What does modification of packages by default means?
> > >> >> >> >>
> > >> >> >> >> 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.
> > >> >> >> >>
> > >> >> >> >> 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.
> > >> >> >> >>
> > >> >> >> >
> > >> >> >> > What do you think the rootfs must contain?
> > >> >> >>
> > >> >> >> The rootfs can contain whatever the final system produces, usually
> > >> >> >> everything (packed in a tar.gz).
> > >> >> >>
> > >> >> >>
> > >> >> >
> > >> >> > It will be a big file. Why not tarlz?
> > >> >>
> > >> >> Because tar/gzip is more widely supported, and some laptops
> > >> >> (Chromebooks, if I'm not mistaken) only support this format (to be
> > >> >> loaded in a SD card), I don't know if other formats are supported.
> > >> >>
> > >> >> > I also want to ask you about temporary system. Can we pack it like a
> > >> >> > cross-compiler?
> > >> >>
> > >> >> I don't recommend it, since they contain the hard-coded paths to
> > >> >> fulfill
> > >> >> its purpose, a prior step ensuring that the final system build will
> > >> >> not
> > >> >> be contaminated by host system stuff.
> > >> >>
> > >> >>
> > >> >
> > >> > Is it only tools directory?
> > >>
> > >> Yes, exactly.  This does not represent a running system (with a kernel
> > >> image, etc.) but it is about temporary tools to build the final
> > >> system.
> > >>
> > >
> > > I tried to understand what depends on hard coded paths but I couldn't
> > > do it. In every place we know where is tools directory. I can't
> > > understand why we need link to tools directory and what depends on it.
> > > Could you explain it, please?
> >
> > It is enough to do a `grep tools stages/1/*` to know what depends on
> > /tools. Both the installation of tools and the dynamic linker are going
> > to look through this path, in order to isolate the host system, mainly
> > the isolation of the C library with respect to the system in which you
> > run with the system you want to build.  This is somewhat documented[1]
> > and done by projects such as Linux From Scratch[2].
> >
> >  From [1]:
> >
> > "
> > The overall goal of Chapter 5 and Chapter 6 is to produce a temporary
> > area that contains a known-good set of tools that can be isolated from
> > the host system. By using chroot, the commands in the remaining chapters
> > will be contained within that environment, ensuring a clean,
> > trouble-free build of the target LFS system. The build process has been
> > designed to minimize the risks for new readers and to provide the most
> > educational value at the same time.
> > "
> >
> > [1]
> > https://linuxfromscratch.org/lfs/view/development/partintro/toolchaintechnotes.html
> > [2] https://linuxfromscratch.org/lfs/
> >
> >
>
> It seems to me that gcc has linker option -rpath...

Ok. I didn't think -rpath won't have sense.

First of all, I want to say that I understand why we need tmp system
but I can't understand where it depends on something that we can't
pack like darkcrusade.

After processing stage 1 we get tmp system that depends on itself
only. Yes, we need host system to run it (with chroot) but we can move
it to another system. It is self-contained like darkcrusade compilers.
Where am I wrong?