[Buildroot] [PATCH 12/15 v4] fs: use a common tarball as base for the other filesystems

[Arnout Vandecappelle]

On 31-03-18 11:05, Yann E. MORIN wrote:
> Currently, some filesystems may want to tweak the content of the target
> directory, create special device nodes etc... This all means that:
> 
>   - the content of the target directory for a specific filesystems may
>     depend on whether another filesystem is enabled or not; for example,
>     cpio will create a /init script or symlink and a /dev/console node;
> 
>   - the filesysems can not be built in parallel, because they may change
>     the content of the target directory wil another is being assembled.
> 
> Furthermore, the same fakeroot script is executed over-and-over-again
> for each filesystem, to create the device nodes, the users and their
> homes and files, and setting permissions...
> 
> We introduce an intermediate tarball, for which we do the full fakeroot
> shebang.
> 
> That tarball then serves as the base for the other filesystems, with a
> very simple fakeroot script that untars the common tarball, and calls
> the actual filesystem image generator on that.
> 
> Note that we use a very simple tar command to generate the intermediate
> tarball, because we are not concerned with reproducibility of the
> archive itself (only of the archived files).

 Could be good to mention explicitly in the commit log that now the
THIS_IS_NOT_YOUR_ROOT_FILESYSTEM is "removed" by excluding it from the tarball.

 Otherwise LGTM.

 Regards,
 Arnout

> 
> Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> Cc: Arnout Vandecappelle <arnout at mind.be>
> ---[snip]

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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