This feature caches all the deb files during docker build and stores them
into version cache.
It loads the cache file if already exists in the version cache and copies the extracted
deb file from cache file into Debian cache path( /var/cache/apt/archives).
The apt-install always installs the deb file from the cache if exists, this
avoid unnecessary package download from the repo and speeds up the overall build.
The cache file is selected based on the SHA value of version dependency
files.
Why I did it
How I did it
How to verify it
* 03.Version-cache - framework environment settings
It defines and passes the necessary version cache environment variables
to the caching framework.
It adds the utils script for shared cache file access.
It also adds the post-cleanup logic for cleaning the unwanted files from
the docker/image after the version cache creation.
* 04.Version cache - debug framework
Added DBGOPT Make variable to enable the cache framework
scripts in trace mode. This option takes the part name of the script to
enable the particular shell script in trace mode.
Multiple shell script names can also be given.
Eg: make DBGOPT="image|docker"
Added verbose mode to dump the version merge details during
build/dry-run mode.
Eg: scripts/versions_manager.py freeze -v \
'dryrun|cmod=docker-swss|cfile=versions-deb|cname=all|stage=sub|stage=add'
* 05.Version cache - docker dpkg caching support
This feature caches all the deb files during docker build and stores them
into version cache.
It loads the cache file if already exists in the version cache and copies the extracted
deb file from cache file into Debian cache path( /var/cache/apt/archives).
The apt-install always installs the deb file from the cache if exists, this
avoid unnecessary package download from the repo and speeds up the overall build.
The cache file is selected based on the SHA value of version dependency
files.
Why I did it
Fix host image debian package version issue.
The package dependencies may have issue, when some of debian packages of the base image are upgraded. For example, libc is installed in base image, but if the mirror has new version, when running "apt-get upgrade", the package will be upgraded unexpected. To avoid such issue, need to add the versions when building the host image.
How I did it
The package versions of host-image should contain host-base-image.
