05/03/14 20:10, intrigeri wrote:
> Hi,
>
> preamble: I'd like to see this in Tails 0.23, since this will be the
> first release when most users see incremental upgrades in action, and
> it would be good for them if the IUK download time was a bit shorter.
>
> I'm now running most of our automated test suite against this ISO,
> in the hope it increases chances to see this branch merged in time.
>
> feature/better-iso-cleanup makes our ISOs and IUKs smaller in various
> ways:
>
> * Set mtime to the epoch for large files whose content generally
> does not change. This forces rsync to consider the actual content
> of these files, when preparing an IUK, instead of blindly adding
> it to the IUK merely because the mtime has changed, while the
> content is (generally) the same. That's #6425.
> * Exclude more icon theme caches from the ISO (we already did so for
> one icon theme, why not do it for all and save some space on the
> ISO; besides, these large files see their auto-generated content
> changing at every build, so they needlessly increase the size of
> our IUKs)
> * Use the SquashFS exclusion rules instead of deleting files in
> a hook. It seemed cleaner to me to do this in a higher-level way.
> * Truncate log files after the last APT run.
> Else, dpkg and APT logs are not empty in the ISO.
> * Remove *.pyc *after* 99-dedup_usr_share_doc.
> 99-dedup_usr_share_doc runs `hardlink', that is written in Python,
> so this might create pyc files that were previously removed if we
> did it in the other way.
I had concerns for some of the above points, but intrigeri explained to
me off list why things are as they are and I'm now convinced.
> Additionally, I've included some trivial build hook cleanups and
> consistency improvement (mostly in the logging area).
Nice! :)
> The resulting ISO is 8MB smaller, and I've seen a 9% size decrease on
> a IUK.
My devel ISO was actually about 20 MB smaller, but admittedly that build
was three days old.
Merged!
Cheers!
