Fix previous channel detection

This failed if the build metadata contained a period, as in v1.23.0-rc.0 Signed-off-by: Brad Davidson <brad.davidson@rancher.com> (cherry picked from commit 247298a2)

Fix previous channel detection
58501554 · Brad Davidson · Brad Davidson · 8b4553c9 · 58501554
Commit 58501554 authored Dec 03, 2021 by Brad Davidson Committed by Brad Davidson Dec 22, 2021
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test-run-compat scripts/test-run-compat +1 -1

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--- a/scripts/test-run-compat
+++ b/scripts/test-run-compat
@@ -28,7 +28,7 @@ export -f test-post-hook

 REPO=${REPO:-rancher}
 IMAGE_NAME=${IMAGE_NAME:-k3s}
-PREVIOUS_CHANNEL=$(grep 'k8s.io/kubernetes v' go.mod | head -n1 | awk '{print $2}' | awk -F. '{print "v1." ($(NF - 1) - 1)}')
+PREVIOUS_CHANNEL=$(grep 'k8s.io/kubernetes v' go.mod | head -n1 | awk '{print $2}' | awk -F. '{print "v1." ($2 - 1)}')
 PREVIOUS_VERSION=$(curl -s https://update.k3s.io/v1-release/channels/${PREVIOUS_CHANNEL} -o /dev/null -w '%{redirect_url}' | awk -F/ '{print gensub(/\+/, "-", "g", $NF)}')
 STABLE_VERSION=$(curl -s https://update.k3s.io/v1-release/channels/stable -o /dev/null -w '%{redirect_url}' | awk -F/ '{print gensub(/\+/, "-", "g", $NF)}')
 LATEST_VERSION=$(curl -s https://update.k3s.io/v1-release/channels/latest -o /dev/null -w '%{redirect_url}' | awk -F/ '{print gensub(/\+/, "-", "g", $NF)}')