From 9ca9b47ef1b03e43e169ea2324a7df7efcbee4f8 Mon Sep 17 00:00:00 2001
From: Itxaka <itxaka.garcia@spectrocloud.com>
Date: Thu, 15 Jun 2023 10:43:10 +0200
Subject: [PATCH] :art: Rework supported k3s versions (#411)

---
 .github/bump_k3s_versions.sh | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/.github/bump_k3s_versions.sh b/.github/bump_k3s_versions.sh
index ed81207..05da9a1 100755
--- a/.github/bump_k3s_versions.sh
+++ b/.github/bump_k3s_versions.sh
@@ -7,13 +7,23 @@ verlte() {
 }
 
 # https://www.shellcheck.net/wiki/SC2207
-mapfile -t versionsArray < <(curl https://update.k3s.io/v1-release/channels | jq -rc '[ .data[] | select(.type == "channel") | select(.name | test("testing") | not) | .latest ] | unique | .[]')
+mapfile -t versionsArray < <(curl -s https://update.k3s.io/v1-release/channels | jq -rc '[ .data[] | select(.type == "channel") | select(.name | test("testing") | not) | .latest ] | unique | .[]')
 
-# Filter only versions above v1.20.0 (https://stackoverflow.com/a/40375567)
+# This gives us the latest stable version minor number
+latest_version=$(curl -s https://update.k3s.io/v1-release/channels | jq -rc '.data[] | select(.id == "latest") | .latest' | cut -d. -f2)
+# Supported versions are the latest 3 ones:
+# "The Kubernetes project maintains release branches for the most recent three minor releases (1.27, 1.26, 1.25)"
+# from https://kubernetes.io/releases/
+# So we calculate that based on the $(latest release - 2) to get the supported upstream versions
+supported_version=$((latest_version-2))
+echo "Supported minimum version: v1.$supported_version.0"
+
+# Filter only versions above v1.$supported_version.0 (https://stackoverflow.com/a/40375567)
 for index in "${!versionsArray[@]}" ; do
-    (verlte "${versionsArray[$index]}" v1.20.0) && unset -v 'versionsArray[$index]'
+    (verlte "${versionsArray[$index]}" v1.$supported_version.0) && unset -v 'versionsArray[$index]'
 done
 versions="${versionsArray[*]}"
+echo "Found supported versions: $versions"
 
 amd64_flavor=("opensuse-leap" "opensuse-tumbleweed" "alpine-ubuntu" "alpine-opensuse-leap" "ubuntu" "ubuntu-20-lts" "ubuntu-22-lts" "fedora" "debian")
 arm64_flavor=("opensuse-leap-arm-rpi" "opensuse-tumbleweed-arm-rpi" "alpine-arm-rpi")
@@ -23,10 +33,12 @@ releases_arm="[]"
 
 for row in $versions; do
   for flavor in "${amd64_flavor[@]}"; do
+    echo "Adding version $row for flavor $flavor on amd64"
     releases=$(echo "$releases" | jq ". += [{ \"flavor\": \"$flavor\", \"k3s_version\": \"$row\" }]" )
   done
   for flavor in "${arm64_flavor[@]}"; do
     for model in "${arm64_models[@]}"; do
+      echo "Adding version $row for flavor $flavor and model $model on arm64"
       releases_arm=$(echo "$releases_arm" | jq ". += [{ \"flavor\": \"$flavor\", \"model\": \"$model\", \"k3s_version\": \"$row\" }]" )
     done
   done