Add diff script

hack/diff/compare.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+
+# get the state and all objects from each composite
+function get_state() {
+  type="$1"
+  name="$2"
+  dir_name="tmp/$type-$name"
+
+  mkdir -p "$dir_name"
+
+  while read -r res_type res_name
+  do
+    kubectl get "$res_type" "$res_name" -oyaml > "$dir_name/$res_type-$res_name.yaml"
+  done <<< "$(kubectl get "$type" "$name" -oyaml | yq -r '.spec.resourceRefs | .[] | .kind + " " + .name')"
+
+}
+
+# also get the claim namespace
+function get_claim_namespace() {
+  type="$1"
+  name="$2"
+  dir_name="tmp/$type-$name"
+
+  ns=$(kubectl get "$type" "$name" -oyaml | yq -r '.metadata.labels["crossplane.io/claim-namespace"]')
+  kubectl get ns "$ns" -oyaml > "$dir_name/namespace.yaml"
+
+}
+
+function run_func() {
+  docker run -d --name func -p 9443:9443 ghcr.io/vshn/appcat:"$1" functions --insecure
+  sleep 3
+}
+
+function stop_func() {
+  docker rm -f func
+}
+
+function run_single_diff() {
+  type="$1"
+  name="$2"
+  dir_name="tmp/$type-$name"
+  res_dir_name="res/$type/$name"
+
+  mkdir -p "$res_dir_name"
+
+  kubectl get "$type" "$name" -oyaml > xr.yaml
+  comp=$(kubectl get "$type" "$name" -oyaml | yq -r '.spec.compositionRef.name')
+  echo "composition: $comp"
+  kubectl get compositions.apiextensions.crossplane.io "$comp" -oyaml > composition.yaml
+  go run github.com/crossplane/crossplane/cmd/crank@v1.17.0 render hack/diff/xr.yaml hack/diff/composition.yaml hack/diff/function.yaml -o "$dir_name" > "$res_dir_name/$3.yaml"
+}
+
+function get_running_func_version() {
+  version=$(kubectl get function function-appcat -oyaml | yq -r '.spec.package' | cut -d ":" -f2)
+  echo "${version%"-func"}"
+}
+
+function diff() {
+  run_func "$1"
+  trap stop_func EXIT
+
+  while read -r type name rest
+  do
+    get_state "$type" "$name"
+    get_claim_namespace "$type" "$name"
+    run_single_diff "$type" "$name" "$2"
+  done <<< "$(kubectl get composite --no-headers | sed 's/\// /g' )"
+}
+
+# do the diff
+function first_diff() {
+  diff "$(get_running_func_version)" "first"
+}
+
+function second_diff() {
+  diff "$(git rev-parse --abbrev-ref HEAD | sed 's/\//_/g')" "second"
+}
+
+stop_func
+rm -rf tmp
+rm -rf res
+
+first_diff
+seconf_diff

hack/diff/function.yaml

@@ -0,0 +1,10 @@
+apiVersion: pkg.crossplane.io/v1beta1
+kind: Function
+metadata:
+  name: function-appcat
+  annotations:
+    render.crossplane.io/runtime: Development
+spec:
+  # The tag here doesn't matter, as the annotation above instructs
+  # crank to connect to a local grpc endpoint.
+  package: ghcr.io/vshn/appcat:v4.92.0-func