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Finish merged-usr process for generic images, move SDK over to it too #2068

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merged 8 commits into from
Sep 5, 2024

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@krnowak krnowak commented Jun 28, 2024

Current situation:

  • SDK:
    • /bin, /sbin, /lib, /lib64, /usr/bin, /usr/sbin, /usr/lib, /usr/lib64 are all directories
  • generic:
    • /usr/bin, /usr/sbin, /usr/lib, /usr/lib64 are all directories
    • /bin, /sbin, /lib, /lib64 are symlinks to their counterparts in /usr.

New situation for both (essentially known as merged-usr in Gentoo):

  • /usr/bin, /usr/lib, /usr/lib64 are all directories
  • /sbin and /usr/sbin are effectively symlinks to /usr/bin
  • /bin, /lib, /lib64 are symlinks to their counterparts in /usr.

Directories in /usr/local are left as is, so /usr/local/sbin is still a directory, not a symlink to bin.

There is quite a sizeable refactor of the baselayout ebuild, so please have a look at the commit messages.

CI: http://jenkins.infra.kinvolk.io:8080/job/container/job/sdk/1714/cldsv/

Needs flatcar/baselayout#34 and flatcar/mantle#551.

  • Changelog entries added in the respective changelog/ directory (user-facing change, bug fix, security fix, update)
  • Inspected CI output for image differences: /boot and /usr size, packages, list files for any missing binaries, kernel modules, config files, kernel modules, etc.

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krnowak commented Jul 2, 2024

Filed a fix for Gentoo: gentoo/gentoo#37397

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github-actions bot commented Jul 2, 2024

@krnowak krnowak marked this pull request as ready for review August 29, 2024 13:06
@krnowak krnowak requested a review from a team August 29, 2024 13:06
@krnowak krnowak added the main label Aug 29, 2024
The initial goals of this commit were:

- drop symlink-usr USE flag and keep the code paths where symlink-usr
was evaluated to true,

- make sbin a symlink to its bin counterpart, effectively doing the
merged-sbin process too

- unify filesystem layouts of the SDK and generic images.

But over the course, more changes have accumulated:

- use EAPI 8,

- drop the check_sym function - it never worked due to typos
  (real_path and real_value versus read_path and read_value),

- do the SDK-specific or generic-image-specific customizations in the
  src_prepare phase,

- follow the changes made in the baselayout repository:

  - remove unnecessary tmpfiles.d conf files instead of fiddling with
    sed to edit them:

    - in the baselayout repo, the conf files were split to make it
      possible,

  - use tmpfiles.d to create core home directory:

    - used to be done differently for generic images and for SDKs,

  - use dumb-tmpfiles-proc.sh instead of systemd's tmpfile processor:

    - this removes the need to install valid passwd and group files
      into /etc before,

    - also it seems to be fixing some issues with installing files for
      users and groups that weren't there anyway,

  - drop generating of baselayout-usr in src_compile, and creating
    debug directories in pkg_preinst, these are handled by the
    Makefile now

    - this made inheriting systemd and tmpfiles eclasses unnecessary

- install files in the src_install phase and install the directory
  structure in the pkg_preinst phase:

  - empty directories created in src_install are not guaranteed to be
    preserved, and indeed at some point /usr/local/bin was not
    installed on the final rootfs,

- currently installed /etc/passwd and /etc/group are now empty

- drop DEPEND variable entirely - systemd isn't really needed, I don't
  know what was the point of depending on libidn2, and the rest were
  conflicts with some old versions of packages.
Mask split-usr globally, not only for generic images. Move some SDK
only USE flags to SDK target profile (cros_host, expat). Drop
duplicated disabling of cups USE flag.
It seems to be randomly kept or removed during installation, and we
need the directory when creating the SDK container.
@krnowak krnowak merged commit b99e666 into main Sep 5, 2024
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@krnowak krnowak deleted the krnowak/merged-usr branch September 5, 2024 13:26
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3 participants