Hook for nullfs mounting an extra patches directory in the master jail - see https://dan.langille.org/2019/08/10/poudriere-hooks/

jail.sh

#!/bin/sh
# /usr/local/etc/poudriere.d/hooks/jail.sh

status="$1"

# NOTE: mount is invoked before start: re https://github.com/freebsd/poudriere/wiki/hooks
if [ "$status" = "mount" ] && [ -d /usr/local/etc/poudriere.d/local-patches ]; then
  mntpath="$2"

  # The local-patches directory is created only if it does not already exist.
  # If it does not already exist, it means we are doing this on the master jail
  if [ ! -d "${mntpath}/local-patches" ]; then
    /bin/mkdir "${mntpath}/local-patches"
  fi

  # mount our patches to that location
  /sbin/mount -t nullfs -o ro /usr/local/etc/poudriere.d/local-patches "${mntpath}/local-patches"
fi

exit 0

make.conf

The jail.sh hook can be used on conjunction with an entry in 
/usr/local/etc/poudriere.d/make.conf (or similar) such as this

.if ${.CURDIR:M*/net-mgmt/nagios}
EXTRA_PATCHES+= /local-patches/webserver/nagios.patch
.endif

This approach was created 2 years ago, before I'd heard of poudriere overlays.

I looked at overlay and could not figure out how to get it work.

Do you see any advantages?

Do you see any advantages?

I see an advantage with this hook, it is closer to having a unionfs-mounted overlay (instead of the current nullfs-mounted one). I have not tested exhaustively, but from my initial tests, you would need to have all the port files + patches, instead of just the diff from the ports tree (local patches).

I looked at overlay and could not figure out how to get it work.

Here is my sample repo: https://github.com/jlduran/test-poudriere-overlay. It basically uses the category/port directory from the overlay instead of the default one. If you're using git, this approach might be a bit excessive for my needs.