az storage azcopy blob: allow arbitrary arguments

[Arithmomaniac]

Extension name

storage-preview

Description of issue

The az storage azcopy blob commands support only a limited number of the underlying azcopy flags for each command. Currently, to get past that you have to use az storage azcopy run-command, but then you lose the automatic connection string / SAS configuration.

Proposal

Every az storage azcopy blob command takes an --additional-flags string flag that can be appended to the ones built by the CLI for advanced scenarios. For example, --additional-flags "--put-md5 true".

[yonzhan]

storage