Update get_values post-refactor

bin/get_values

@@ -8,16 +8,19 @@
 # 2. the values are already baked into the derivations,
 #    so having them in the output would be redundant.
 
-ns=$1
-name=$2
+if ! [ "$1" ]; then
+  echo "Usage: $0 releases/svc/breezewiki (or similar)"
+fi
+
+path=$1
 
 chart_drv=$(nix derivation show "$(readlink result)" \
-  | jq -r '.[].env.release_drvs' | tr ' ' '\n' | grep "$ns-$name"
-  # Also acceptable, but requires '^*' appended in next `nix` command
-  # because this is the .drv path:
-  # | jq -r '.[].inputDrvs | keys[] | select(test("'"$ns-$name"'"))'
+  | jq -r '.[].env.derivation_paths' \
+  | tr ' ' '\n' \
+  | grep "$path/RELEASE.yaml" \
+  | cut -d: -f2
 )
 
 nix derivation show "$chart_drv" \
 | jq -r '.[].env.helmValues' \
-| yq -y
+| yq -p json -o yaml