List command waits for entire archive to be processed before outputting anything

[AntonHermann]

Currently the list command reads the whole archive into a Vec before outputting anything, thus for big archives a long time nothing is printed at all

Expected behavior

• when running without --tree: print each file as soon as it's processed
• when running with --tree: show a progress indication ("reading files..." or "reading files: XX%") while files are read

Implementation suggestions

• when running without --tree: instead of returning a Vec from archive::{tar,zip}::list_archive, maybe we can return an iterator or similar instead?
• when running with -tree: gray text which is deleted as soon as output is ready would look nice I guess

[marcospb19]

Like the idea.

But what happens with text that is deleted afterwards when the output is redirected to another file? Does it break anything? If so, I think that a [INFO] call would be better.

[AntonHermann]

Good question, I'll try to figure out how that is handled and how other CLI programs that rewrite their output handle this case