Re: [PATCH v2 1/1] fix: rebuild rootfs on change of USERS

["'Clara Kowalsky' via isar-users" <isar-users@googlegroups.com>]

On 11.04.25 13:26, Felix Moessbauer wrote:
> In case a change to the Isar created users is done, this currently
> only re-triggers the do_rootfs_postprocess task. This task changes the
> rootfs (e.g. home dirs are moved) and by that needs to operate on a
> clean one. Otherwise old homedirs might still remain in the final rootfs
> or move operations are not possible.
> 
> We fix this by ensuring that the do_rootfs_install task is executed
> whenever a change to USERS is done. By that, we enter the
> do_rootfs_postinstall with a clean rootfs.
> 
> Reported-by: Clara Kowalsky <clara.kowalsky@siemens.com>
> Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com>
> ---
> Changes since v1:
> 
> - Also add dependency to USER_<x> for all x in USERS
> 
>   meta/classes/image-account-extension.bbclass | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/meta/classes/image-account-extension.bbclass b/meta/classes/image-account-extension.bbclass
> index ea956cd5..3c461b1a 100644
> --- a/meta/classes/image-account-extension.bbclass
> +++ b/meta/classes/image-account-extension.bbclass
> @@ -8,6 +8,10 @@
>   USERS ??= ""
>   GROUPS ??= ""
>   
> +# rebuild rootfs on change of USERS as homes might be moved / created
> +# no need to depend on GROUPS as they don't create directories
> +# groups need to be created before users, hence do not move the user creation into
> +# the do_rootfs_install task but only add a dependency
>   python() {
>       for entry in (d.getVar("GROUPS") or "").split():
>           group_entry = "GROUP_{}".format(entry)
> @@ -16,7 +20,9 @@ python() {
>       for entry in (d.getVar("USERS") or "").split():
>           user_entry = "USER_{}".format(entry)
>           d.appendVarFlag("image_postprocess_accounts", "vardeps", " {}".format(user_entry))
> +        d.appendVarFlag("do_rootfs_install", "vardeps", " {}".format(user_entry))
>   }
> +do_rootfs_install[vardeps] += "USERS"
>   
>   def image_create_groups(d: "DataSmart") -> None:
>       """Creates the groups defined in the ``GROUPS`` bitbake variable.

This works, at least for the case of adding / moving the home directory 
of an existing user. Only removing an existing home dir when removing 
all home flags of a user is not covered, but we can ignore this for now.
BR,
Clara

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