Commits on Dec 16, 2022

1. [build] quiet & speed up packages installation …

   Many apt and pip commands are called inside chroot during SONiC build
   process.
   Though they are not interactive, they generate a lot of scrolling output
   in the console that slows down the whole SONiC installation process.
   
   https://shallowsky.com/blog/linux/performance-of-scrolling-output.html
   
   Most of this output has no added value and makes troubleshooting more
   complex.
   It can be safely disabled by setting the right environment variables
   and/or options. Note they cannot completely prevent underlying
   calls to dpkg from displaying a few output. Only a redirection to
   /dev/null can prevent the dpdk output from being displayed
   
   Also since there are several wrappers to apt (apt-get/apt/aptitude)
   and since almost all of these apt calls are done inside chroot,
   it is preferable from a maintenance and efficiency perspective to
   - create a shell function with all these parameters to install packages
   - cascade contiguous chroot and apt or pip commands to avoid mutiple
     context allocations
   
   Signed-off-by: Guillaume Lambert <guillaume.lambert@orange.com>

   

   guillaumelambert committed Dec 16, 2022
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