bsd: upgrade support

Implement the upgrade support:

- FreeBSD: using `pkg upgrade`
- NetBSD: with `pkgin`

cloudinit/distros/bsd.py

@@ -18,6 +18,7 @@ class BSD(distros.Distro):
     group_add_cmd_prefix = []
     pkg_cmd_install_prefix = []
     pkg_cmd_remove_prefix = []
+    pkg_cmd_upgrade_prefix = []
     # There is no need to update the package cache on NetBSD and OpenBSD
     # TODO neither freebsd nor netbsd handles a command 'upgrade'
     pkg_cmd_update_prefix = None
@@ -97,6 +98,10 @@ def package_command(self, command, args=None, pkgs=None):
             if not self.pkg_cmd_update_prefix:
                 return
             cmd = self.pkg_cmd_update_prefix
+        elif command == 'upgrade':
+            if not self.pkg_cmd_upgrade_prefix:
+                return
+            cmd = self.pkg_cmd_upgrade_prefix
 
         if args and isinstance(args, str):
             cmd.append(args)

cloudinit/distros/freebsd.py

@@ -25,6 +25,7 @@ class Distro(cloudinit.distros.bsd.BSD):
     pkg_cmd_install_prefix = ["pkg", "install"]
     pkg_cmd_remove_prefix = ["pkg", "remove"]
     pkg_cmd_update_prefix = ["pkg", "update"]
+    pkg_cmd_upgrade_prefix = ["pkg", "upgrade"]
 
     def _select_hostname(self, hostname, fqdn):
         # Should be FQDN if available. See rc.conf(5) in FreeBSD

cloudinit/distros/netbsd.py

@@ -21,10 +21,18 @@ class NetBSD(cloudinit.distros.bsd.BSD):
     """
 
     ci_sudoers_fn = '/usr/pkg/etc/sudoers.d/90-cloud-init-users'
-
     group_add_cmd_prefix = ["groupadd"]
-    pkg_cmd_install_prefix = ["pkg_add", "-U"]
-    pkg_cmd_remove_prefix = ['pkg_delete']
+
+    def __init__(self, name, cfg, paths):
+        super().__init__(name, cfg, paths)
+        if os.path.exists("/usr/pkg/bin/pkgin"):
+            self.pkg_cmd_install_prefix = ['pkgin', '-y', 'install']
+            self.pkg_cmd_remove_prefix = ['pkgin', '-y', 'remove']
+            self.pkg_cmd_remove_prefix = ['pkgin', '-y', 'update']
+            self.pkg_cmd_upgrade_prefix = ['pkgin', '-y', 'upgrade']
+        else:
+            self.pkg_cmd_install_prefix = ['pkg_add', '-U']
+            self.pkg_cmd_remove_prefix = ['pkg_delete']
 
     def _get_add_member_to_group_cmd(self, member_name, group_name):
         return ['usermod', '-G', group_name, member_name]