On Mon, Mar 31, 2025 at 01:39:57PM +0200, Vitaly Zaitsev via devel wrote:
> On 31/03/2025 12:53, Zbigniew Jędrzejewski-Szmek wrote:
> > This is inspired by the discussion in "Reproducible Builds" mailing list,
> > in particular [1].
> 
> But auto-generated Git archives are not reproducible. GitHub uses a dirty
> hack: on the first download, it caches the tarball on their resource server,
> and then sends it back on subsequent requests.

Alexander kindly provided a link to the github blog post that says that
this is not true: they only cache the tarball temporarily and the way they
produce the tarballs is stable.

(FWIW, I checked this myself for systemd a few months ago. I downloaded
all the archives for all the releases of systemd from github, and then
produced the same archives using 'git archive' locally with the appropriate
options. The hashes were the same.)

Zbyszek
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