Inconsistent flag names --nosync and --no-mirror

[ryandesign (Ryan Carsten Schmidt)]

sudo port selfupdate accepts a flag --nosync.

sudo port fetch accepts a flag --no-mirrors.

It is confusing that one of the flags uses a hyphen (-) between words and the other does not.

Since --no-mirrors is new for MacPorts 2.5.0 which was not been released yet, we could easily change it to --nomirrors before release without introducing confusion for most users.

Or, if we like the hyphenated version better, we could change the selfupdate flag to --no-sync, while keeping --nosync for backward compatibility. I don't see any other multiword options that aren't hyphenated, so this is probably the alternative I'd go with.

[mojca (Mojca Miklavec)]

Personally I prefer the version with hyphen.

[raimue (Rainer Müller)]

We also have port install --no-rev-upgrade and port rdeps --no-build. The version with hyphen seems to be preferred already, so we should change this to port selfupdate --no-sync and deprecate the old --nosync with a warning.

[raimue (Rainer Müller)]

In ce6d4817b3ce8cb4beeb26ac0591d5770a288798/macports-base (master):

Deprecate port selfupdate --nosync, add --no-sync

Closes: #56434