Bug#952911: [live-build] make use of cache for firmware list determination
Package: live-build
Version: 1:20191221
Owner: jnqnfe@gmail.com
Severity: minor
as mentioned in #952907 and #952910, the content archives files used in
determining a list of firmware packages available are always downloaded
afresh, deleting any existing file that had been saved to the cache.
this is inefficient, even just within a single build (the same file
might be processed up to four times - chroot_firmware and
installer_debian-installer, and twice each in each if done for both
parent and derived without the #952909 fix). then we must consider
multiple runs, especially important when developing LB. it takes time
to download these files.
it also has implications wrt. offline building, should anyone be
interested in that.
consideration should be given to actually making use of cached files.
patch implementing use of cached files to be submitted via salsa soon
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