ignoring folders in mercurial

Question

Caveat: I try all the posibilities listed here: How can I ignore everything under a folder in Mercurial.
None works as I hope.

I want to ignor

Answer 1

Both cases worked for me (on linux and windows):

syntax: regexp
^backup/     #root folder
nbproject/   #any folder

or

syntax: glob
./backup/*   #root folder
nbproject/*  #any folder

However, it wasn't before I added a link to .hgignore file to .hgrc file in my repo:

[ui]
ignore = .hg/.hgignore

Also worth mentioning that mercurial ignores files that it is not currently tracking, which are those added before you configured it to ignore them. So, don't be put off by hg status saying some filed are M (modified) or ! (missing) in the folders that you have just added to the ignore list!