snap debug base-declaration jq slot allow-installation examples

snap-decls.sh

#!/bin/bash 

# NOTE: the following commands are rather simplistic and ignore the logic around deny-installation, which should also hypothetically affect these lists, but really taking that into account requires more logic than I'm willing to put into a jq command

echo ">>> GADGET SNAP SLOT INTERFACES <<<"
echo

# Get all slots that can be used on a gadget snap specifically
snap debug base-declaration | \
  head -n -1 | \
  yaml2json | \
  jq -r '.slots | map_values(select( ( ."allow-installation" | type == "object" ) and ( ."allow-installation"."slot-snap-type" | index("gadget") != null ) ) ) | keys | .[]'

echo
echo ">>> APP SNAP SLOT INTERFACES <<<"
echo

# Get all slots that can be used on an app snap specifically
snap debug base-declaration | \
  head -n -1 | \
  yaml2json | \
  jq -r '.slots | map_values(select( ( ."allow-installation" | type == "object" ) and ( ."allow-installation"."slot-snap-type" | index("app") != null ) ) ) | keys | .[]'

echo
echo ">>> SYSTEM SNAP SLOT INTERFACES <<<"
echo

# Get all slots that can be used on core/system specifically
snap debug base-declaration | \
  head -n -1 | \
  yaml2json | \
  jq -r '.slots | map_values(select( ( ."allow-installation" | type == "object" ) and ( ."allow-installation"."slot-snap-type" | index("core") != null ) ) ) | keys | .[]'

echo
echo ">>> ANY SNAP SLOT INTERFACES <<<"
echo

# Get all slots that can be used on any kind of snap (i.e. are totally unconstrained) - this is currently not used at all, every interface currently has a slot allow-installation rule on it
snap debug base-declaration | \
  head -n -1 | \
  yaml2json | \
  jq -r '.slots | map_values(select( (has("allow-installation") | not) or ( ."allow-installation" == null ) or ( ."allow-installation" == true) ) ) | keys | .[]'

echo
echo ">>> SUPER-PRIVILEGED SNAP SLOT INTERFACES <<<"
echo

# These interfaces are not allowed to be slotted at all, and as such are considered super-privileged, since they need a snap-declaration in order to be installed as a slot at all on any snap.
snap debug base-declaration | \
  head -n -1 | \
  yaml2json | \
  jq -r '.slots | map_values(select( ."allow-installation" == false ) ) | keys | .[]'


# Now the full set for each type (any, gadget, app, and core) is given by the union between the any group and each of the specific groups above
# TODO: actually do the unions, for now it is unnecessary since ANY is empty