This feature makes Mercurial VCS build inputs immutable by adding
support for pinning a Mercurial checkout by a hash of its content using
the deterministic export functionality `hg archive`.
This feature aids packagers by allowing them to use simple and
convenient refnames (instead of full commit hashes) in the `PKGBUILD`
while still preserving security implications of immutable build inputs
using a trusted cryptographic hash function of the content.
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>
ca3c873d48