make target is recreating deb packages even though they are present in the target folder

[Puneet1726]

Description

Steps to reproduce the issue:

1. clone sonic repo to new path
2. copy target folder from already built path
3. run make configure PLATFORM=vs
4. run make list
5. run make target/docker-sonic-mgmt-framework-dbg.gz

Describe the results you received:

It is rebuilding deb packages even though they are already present in the target folder

Describe the results you expected:

It should just rebuild the docker gz file and should not rebuild the deb packages

Output of show version:

(paste your output here)

Output of show techsupport:

[ 01 ] [ target/debs/bookworm/libnl-3-200_3.5.0-1_amd64.deb ]
[ 02 ] [ target/debs/bookworm/libyang2_2.0.112-6_amd64.deb ]
[ 03 ] [ target/python-wheels/bookworm/redis_dump_load-1.1-py3-none-any.whl ]
[ 04 ] [ target/debs/bookworm/socat_1.7.4.1-3_amd64.deb ]
Removing patch ../redis-dump-load.patch/0002-Fix-setup.py-for-test-and-bdist_wheel.patch
Restoring setup.py

[ 01 ] [ target/python-wheels/bookworm/sonic_config_engine-1.0-py3-none-any.whl ]

We are trying to reduce the time to build sonic image/target by using pre built deb packages.
Right now it is rebuilding deb packages even though they are present in /target/deb/bookworm path after copying from another build directory.

We are trying reduce the time taken by each developer for the build. Any suggestion is appreciated

[prabhataravind]

@Puneet1726, could you check the design document for sonic build and see if there are any improvements that could help in this case? Could you also confirm if you see the same problem if you do a rebuild after at least one initial build (after cloning)?

[Puneet1726]

@prabhataravind : with SONIC_DPKG_CACHE_METHOD=rwcache target/docker-sonic-mgmt-framework.gz, I am able to reduce the inital build time but it takes around 15mins for sonic mgmt framework build for the first time after copying the prebuilt artifacts (copy full target folder).

Can we reduce it to 5mins? Do I need to copy any other folder/artifacts to achieve that from pre built path?

This problem is for initial build and it is fine after first build