Scott Little bbd79fcd38 Fast download of lower layer rpms ...

The default yumdownloader approach to downloading files
does so one at a time, and is very slow.  Too slow for layered
build which is built around the assumption that files can
be downloaded faster than they can be built.

This update will switch from yumdownloader to reposync
for the download of lower layer rpms.  It exploits the
fact that each layer and build type publishes it's own lst file
of rpms to download.  The lst file is transformed into an'
includepkgs directive in a custom yum.conf which is passed
to reposync, so we only sync the desited rpms.

Reposync won't redownload rpms that it already has, even if the
upstream repodata indicates that the files checksum has changed.
Forceing the redownload of these rpms requires that we manually
download the upstream repodata and that we use verifytree to
identify and delete the new obsolete rpms.

Also including two small bug fixes found while investivgating an
alternative solution to launchpad  1864221.
- incorrect userid in a chown
- Bug in get_url, --url pass being passed in the wrong place

Story: 2006166
Task: 39307
Closes-Bug: 1864221
Change-Id: If12b98ff4f5f24d9318250356920f397419f0f80
Signed-off-by: Scott Little <scott.little@windriver.com>

2020-04-14 16:14:01 -04:00

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