The .hgrc file
See revision tagged 1.0 of hgrc.5.txt below.
Quote from "7.4.1 Shell-style glob patterns" in chapter 7 of the hgbook:
- The “⋆” character matches any string, within a single directory.
- The “⋆⋆” pattern matches any string, and crosses directory boundaries. It’s not a standard Unix glob token, but it’s accepted by several popular Unix shells, and is very useful.