[pacman-dev] [PATCH] makepkg: do not save fflags when creating packages

Allan McRae allan at archlinux.org
Tue Oct 8 02:59:22 UTC 2019

On 8/10/19 12:48 pm, Eli Schwartz wrote:
> On 10/7/19 10:34 PM, Allan McRae wrote:
>> On 8/10/19 7:18 am, Eli Schwartz wrote:
>>> This breaks reproducible builds due to encoding information specific to
>>> the filesystem which was used to build the package, information which we
>>> are never interested in for packaging purposes anyway.
>>> It also means that attempting to extract a package file as root (or
>>> fakeroot) might result in angry warnings being printed to the console by
>>> bsdtar, followed by a non-zero exit code, unless the user remembers to
>>> use --no-fflags during extraction. This is unpleasant UI, even if pacman
>>> itself won't care about these.
>> What warnings?   How would I replicate those warnings?  I am currently
>> not seeing any...
> An example package is the current pacman-contrib-1.2.0-2 package in
> [community] -- it has the nocow attribute, because it must have been
> built on a CoW-supporting filesystem.
> Try extracting it using `sudo bsdtar` or `fakeroot bsdtar`, and if the
> filesystem you extract it to is NOT a CoW-supporting filesystem it will
> complain.
> For example, it worked for me originally, because my rootfs is a BTRFS
> filesystem and I extracted it to a subdirectory of $HOME, but, when I
> repeated the experiment in /tmp, I got the complaints.

Ah - I misread your commit message.  I thought adding the --no-fflags
option resulted in an error when extracting the package with bsdtar.

Patch is good then.


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