Feature request: add flag to control `force_upload` option in `sam sync`

[adagradschool]

Describe your idea/feature/enhancement

I wish sam sync command took an optional flag force_upload. Currently if I make a minute change in one resource of the cloudformation stack, then all the packages are zipped and uploaded to s3 making the local loop slow. Although there is a cache mechanism it never gets triggered because the force_upload is hardcoded to True. Doing so on a forked version helped me remove 90+s per run (20%+ faster).

Proposal

Add details of how to add this to the product.

Things to consider:

1. Will this require any updates to the SAM Spec

• This will require some documentation changes.

[Huyenmy3082020]

ok

[Vandita2020]

Hey @adagradschool, thanks for the suggestion and opening the issue. Our team will work on it.