What does the RepublishAll switch do in the SPE Publish-Item command?

Question

I suppose one should take the name of the switch at "face value", but it's difficult when there's already a PublishMode parameter which defines how the command is intended to work.

So, I guess more specifically, if I invoke the following command:

Publish-Item master:/sitecore/content/Home -Recurse -PublishMode Full

How is it different from the following command?

Publish-Item master:/sitecore/content/Home -Recurse -PublishMode Full -RepublishAll

Answer 1

PublishItemCommand passes this parameter to PublishOptions which are used while publishing.

And PublishOptions.RepublishAll, according to Sitecore documentation:

Gets a value indicating whether all data in all languages will be published.

This is a special mode of publishing used for completely rebuilding a web database.

true if all languages will be published; otherwise, false