[bug#69587] [PATCH] doc: Add “Source Tree Structure” section.

[pelzflorian (Florian Pelz)]

Thank you Giovanni for voicing support; I’m afraid I sounded more
opposed than I am.

Giovanni Biscuolo <g@xelera.eu> writes:
> Also, please don't (dis)miss the usefulness of such documentation as a
> sort of meta-literate programming, probably also useful for expert Guix
> programmers too, IMHO

Do you think the following controversial parts should stay?  But what is
their audience, and why explain them but not the directories build-aux
and nix and some other not so important files in guix?

‘gnu/system’
     These are core Guix System modules, such as:

     ‘(gnu system)’
          Defines ‘operating-system’ (*note operating-system
          Reference::).
     ‘(gnu system file-systems)’
          Defines ‘file-system’ (*note File Systems::).
     ‘(gnu system mapped-devices)’
          Defines ‘mapped-device’ (*note Mapped Devices::).

‘gnu/build’
     These are modules that are either used on the “build side” when
     building operating systems or packages, or at run time by operating
     systems.

     ‘(gnu build accounts)’
          Creating ‘/etc/passwd’, ‘/etc/shadow’, etc.  (*note User
          Accounts::).
     ‘(gnu build activation)’
          Activating an operating system at boot time or reconfiguration
          time.
     ‘(gnu build file-systems)’
          Searching, checking, and mounting file systems.
     ‘(gnu build linux-boot)’
     ‘(gnu build hurd-boot)’
          Booting GNU/Linux and GNU/Hurd operating systems.
     ‘(gnu build linux-initrd)’
          Creating a Linux initial RAM disk (*note Initial RAM Disk::).

[…]
‘gnu/installer’
     This contains the text-mode graphical system installer (*note
     Guided Graphical Installation::).

‘gnu/machine’
     These are the “machine abstractions” used by ‘guix deploy’ (*note
     Invoking guix deploy::).

[…]
‘po’
     This is the location of translations of Guix itself, of package
     synopses and descriptions, of the manual, and of the cookbook
     (*note Translating Guix::).

> Last but not least, I have a feeling it's time to split the Guix manual
> in two: one for users, like "GNU Guix User Manual" and one for
> programmers [1], like "GNU Guix Programmer Manual", with chapters like
> "Programming Interface", "Platforms", "Bootstrapping", "Porting",
> "Contributing"... but that's another story, OT here.

Hmm why?  But yes, another story.

Regards,
Florian