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go-get-kubernetes.sh: make replace statement pruning optional #141

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Nov 2, 2021
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go-get-kubernetes.sh: make replace statement pruning optional #141

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35 changes: 32 additions & 3 deletions go-get-kubernetes.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -26,14 +26,43 @@ set -o pipefail
cmd=$0

function help () {
echo "$cmd <kubernetes version = x.y.z> - update all components from kubernetes/kubernetes to that version"
cat <<EOF
$cmd -p <kubernetes version = x.y.z>

Update all components from kubernetes/kubernetes to that version.

By default, replace statements are added for all Kubernetes packages,
whether they are used or not. This is useful when preparing a
repository for using k8s.io/kubernetes, because those replace
statements are needed to avoid "unknown revision v0.0.0" errors
(https://github.com/kubernetes/kubernetes/issues/79384).

With the optional -p flag, all unused replace statements are
pruned. This makes go.mod smaller, but isn't required.

The replace statements are needed for "go get -u ./..." which
otherwise ends up updating Kubernetes packages like client-go to
incompatible versions (in that case, a very old 1.x release which
happens to have a "higher" version number than the current
0.<Kubernetes minor version>.<Kubernetes patch version> numbers.
EOF
}

prune=false

while getopts "ph" o; do
case "$o" in
h) help; exit 0;;
p) prune=true;;
*) help; exit 1;;
esac
done
shift $((OPTIND-1))

if [ $# -ne 1 ]; then
help
exit 1
fi
case "$1" in -h|--help|help) help; exit 0;; esac

die () {
echo >&2 "$@"
Expand All @@ -55,7 +84,7 @@ mods=$( (set -x; curl --silent --show-error --fail "https://raw.githubuserconten
sed -n 's|.*k8s.io/\(.*\) => ./staging/src/k8s.io/.*|k8s.io/\1|p'
) || die "failed to determine Kubernetes staging modules"
for mod in $mods; do
if ! (env GO111MODULE=on go mod graph) | grep "$mod@" > /dev/null; then
if $prune && ! (env GO111MODULE=on go mod graph) | grep "$mod@" > /dev/null; then
echo "Kubernetes module $mod is not used, skipping"
# Remove the module from go.mod "replace" that was added by an older version of this script.
(set -x; env GO111MODULE=on go mod edit "-dropreplace=$mod") || die "'go mod edit' failed"
Expand Down