Test Autopilot updates for current and previous k0s minor versions

Currently, Autopilot update tests are hard-coded to use some 1.24 k0s
versions. Use the current Kubernetes version to determine the latest
k0s releases for that minor version and the previous minor version. Use
these k0s versions as a base for the Autopilot update tests.

Signed-off-by: Tom Wieczorek <[email protected]>
(cherry picked from commit 8b365f1)

.github/workflows/go.yml

@@ -271,10 +271,19 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
 
-      - id: set-matrix
+      - name: Generate Autopilot test matrix
+        id: set-matrix
         run: |
-          matrix=$(./hack/tools/gen-matrix.sh 1.24.3 1.24.4)
-          echo matrix="$matrix" >> $GITHUB_OUTPUT
+          set -x
+          k8sVersion="$(./vars.sh kubernetes_version)"
+          majorVersion="${k8sVersion%%.*}"
+          minorVersion=${k8sVersion#$majorVersion.}
+          minorVersion="${minorVersion%%.*}"
+
+          {
+            printf matrix=
+            hack/tools/gen-matrix.sh "$majorVersion.$(($minorVersion - 1))" "$majorVersion.$minorVersion"
+          } >> "$GITHUB_OUTPUT"
 
   autopilot-smoketest:
     name: Autopilot smoke test

hack/tools/gen-matrix.sh

@@ -1,20 +1,38 @@
-#!/bin/bash
+#!/usr/bin/env sh
 
-# Founds the last k0s releases of the given versions and generates json MATRIX_OUTPUT for github actions.
+# Finds the last k0s releases of the given versions and generates json MATRIX_OUTPUT for github actions.
 # Usage:
 #  ./gen-matrix.sh 1.24.2 1.24.3
-# Output: ["v1.24.2+k0s.0","v1.24.3+k0s.0"]
+# Output: ["v1.24.2+k0s.0", "v1.24.3+k0s.0"]
 
-go install github.com/k0sproject/version/cmd/[email protected]
-GOBIN="$(go env GOPATH)/bin"
-MATRIX_OUTPUT="["
-COMMA=""
-for i in "$@"; do \
-  RELEASE=$(gh release list -L 100 -R k0sproject/k0s | grep "+k0s." | grep -v Draft | cut -f 1 | $GOBIN/k0s_sort | grep $i | tail -1)
-  MATRIX_OUTPUT+="$COMMA\"$RELEASE\""
-  COMMA=","
-done
+list_k0s_releases() {
+  gh api -X GET /repos/k0sproject/k0s/releases \
+    -F per_page=100 --paginate \
+    --jq '.[] | select(.prerelease == false and .draft == false) | .name'
+}
 
-MATRIX_OUTPUT+="]"
+k0s_sort() {
+  go run github.com/k0sproject/version/cmd/[email protected]
+}
 
-echo $MATRIX_OUTPUT
+latest_release() {
+  list_k0s_releases | grep -F "v$1" | k0s_sort | tail -1
+}
+
+json_print_latest_releases() {
+  printf '['
+
+  pattern='"%s"'
+  for i in "$@"; do
+    latestRelease="$(latest_release "$i")"
+    [ -z "$latestRelease" ] || {
+      # shellcheck disable=SC2059
+      printf "$pattern" "$latestRelease"
+      pattern=', "%s"'
+    }
+  done
+
+  echo ']'
+}
+
+json_print_latest_releases "$@"