From 234d5bce2a5bc6d3b438d885ebf206adb27fb18e Mon Sep 17 00:00:00 2001
From: Brad Davidson <brad.davidson@rancher.com>
Date: Tue, 30 Jul 2024 22:02:37 +0000
Subject: [PATCH] Remove helm v2 support

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
---
 entry              | 79 ++++++++++------------------------------------
 package/Dockerfile |  7 ++--
 2 files changed, 19 insertions(+), 67 deletions(-)

diff --git a/entry b/entry
index 78d9a47..a591ce2 100755
--- a/entry
+++ b/entry
@@ -1,11 +1,7 @@
 #!/bin/bash
 
 helm_update() {
-	if [[ "${HELM}" == "helm_v3" ]]; then
-		LINE="$(${HELM} ls --all -f "^${NAME}\$" --namespace ${TARGET_NAMESPACE} --output json | jq -r "${JQ_CMD}" | tr '[:upper:]' '[:lower:]')"
-	else
-		LINE="$(${HELM} ls --all "^${NAME}\$" --output json | jq -r "${JQ_CMD}" | tr '[:upper:]' '[:lower:]')"
-	fi
+	LINE="$(${HELM} ls --all -f "^${NAME}\$" --namespace ${TARGET_NAMESPACE} --output json | jq -r "${JQ_CMD}" | tr '[:upper:]' '[:lower:]')"
 	IFS=, read -r INSTALLED_VERSION STATUS _ <<<${LINE}
 	VALUES=""
 
@@ -19,14 +15,8 @@ helm_update() {
 			echo "No ${HELM} chart installed; nothing to delete" >> ${TERM_LOG}
 			exit
 		fi
-		if [[ "${HELM}" == "helm_v3" ]]; then
-			echo "Uninstalling ${HELM} chart" >> ${TERM_LOG}
-			${HELM} uninstall ${NAME} --namespace ${TARGET_NAMESPACE} --wait || true
-		else
-			echo "Deleting and purging ${HELM} chart" >> ${TERM_LOG}
-			${HELM} delete ${NAME} || true
-			${HELM} "$@" --purge ${NAME}
-		fi
+		echo "Uninstalling ${HELM} chart" >> ${TERM_LOG}
+		${HELM} uninstall ${NAME} --namespace ${TARGET_NAMESPACE} --wait || true
 		exit
 	fi
 
@@ -37,8 +27,8 @@ helm_update() {
 		exit
 	fi
 
-	# If a previous helm_v3 operation was interrupted unexpectedly, set it to failed.
-	if [[ "${STATUS}" =~ ^(pending-install|pending-upgrade|pending-rollback)$ ]] && [[ "${HELM}" == "helm_v3" ]]; then
+	# If a previous helm operation was interrupted unexpectedly, set it to failed.
+	if [[ "${STATUS}" =~ ^(pending-install|pending-upgrade|pending-rollback)$ ]]; then
 		echo Previous helm job was interrupted, updating status from ${STATUS} to failed
 		echo "Resetting ${HELM} release status from '${STATUS}' to 'failed'" >> ${TERM_LOG}
 		${HELM} set-status ${NAME} failed --namespace ${TARGET_NAMESPACE}
@@ -59,11 +49,7 @@ helm_update() {
 	# Upgrade only if the chart is already deployed
 	if [[ "${STATUS}" == "deployed" ]]; then
 		echo "Already installed ${NAME}"
-		if [[ "${HELM}" == "helm_v3" ]]; then
-			${HELM} mapkubeapis ${NAME} --namespace ${TARGET_NAMESPACE}
-		else
-			${HELM} mapkubeapis ${NAME} --v2
-		fi
+		${HELM} mapkubeapis ${NAME} --namespace ${TARGET_NAMESPACE}
 
 		echo "Upgrading ${HELM} chart" >> ${TERM_LOG}
 		echo "Upgrading ${NAME}"
@@ -75,13 +61,8 @@ helm_update() {
 	# The chart is in a bad state; try uninstalling it first
 	if [[ "${STATUS}" =~ ^(deleted|failed|null|unknown)$ ]]; then
 		if [[ "${FAILURE_POLICY:-reinstall}" == "reinstall" ]]; then
-			if [[ "${HELM}" == "helm_v3" ]]; then
-				echo "Uninstalling ${STATUS} ${HELM} chart" >> ${TERM_LOG}
-				${HELM} uninstall ${NAME} --namespace ${TARGET_NAMESPACE} --wait
-			else
-				echo "Purging ${STATUS} ${HELM} chart" >> ${TERM_LOG}
-				${HELM} "$@" --purge ${NAME}
-			fi
+			echo "Uninstalling ${STATUS} ${HELM} chart" >> ${TERM_LOG}
+			${HELM} uninstall ${NAME} --namespace ${TARGET_NAMESPACE} --wait
 			echo Deleted
 			# Try installing now that we've uninstalled
 			echo "Installing ${HELM} chart" >> ${TERM_LOG}
@@ -107,22 +88,13 @@ helm_repo_init() {
 		return
 	fi
 
-	if [[ "${HELM}" == "helm_v3" ]]; then
-		if [[ ${CHART} == stable/* ]]; then
-			${HELM} repo add ${CA_FILE_ARG} stable ${STABLE_REPO_URL}
-			${HELM} repo update
-		fi
-	else
-		${HELM} repo update --strict || ${HELM} repo remove stable
+	if [[ ${CHART} == stable/* ]]; then
+		${HELM} repo add ${CA_FILE_ARG} stable ${STABLE_REPO_URL}
+		${HELM} repo update
 	fi
 
 	if [[ -n "${REPO}" ]]; then
 		if [[ -f "${AUTH_DIR}/username" ]] && [[ -f "${AUTH_DIR}/password" ]]; then
-			if [[ "${HELM}" == "helm_v2" ]]; then
-				echo "Repo authentication is not supported with v2 charts" >> ${TERM_LOG}
-				echo "Repo authentication is not supported with v2 charts"
-				exit 1
-			fi
 			if [[ "${AUTH_PASS_CREDENTIALS}" == "true" ]]; then
 				PASS_CREDENTIALS_ARG="--pass-credentials"
 			fi
@@ -158,7 +130,7 @@ export TERM_LOG=/dev/termination-log
 export SSL_CERT_FILE=/var/run/secrets/kubernetes.io/serviceaccount/ca.crt
 export SSL_CERT_DIR=/etc/ssl/certs
 export HELM_TLS_CA_CERT=${SSL_CERT_FILE}
-HELM="helm_v3"
+HELM="helm"
 NAME_ARG=""
 CA_FILE_ARG=""
 TIMEOUT_ARG=""
@@ -175,23 +147,10 @@ fi
 
 set +v -x
 
-if [[ "${BOOTSTRAP}" != "true" ]]; then
-	tiller --listen=127.0.0.1:44134 --storage=secret &
-	export HELM_HOST=127.0.0.1:44134
-
-	helm_v2 init --skip-refresh --client-only --stable-repo-url ${STABLE_REPO_URL}
-	V2_CHART_EXISTS=$(timeout -s KILL 30 helm_v2 ls --all "^${NAME}\$" --output json | jq -r '.Releases | length')
-fi
-
-if [[ "${V2_CHART_EXISTS}" == "1" ]] || [[ "${HELM_VERSION}" == "v2" ]]; then
-	if [[ "${BOOTSTRAP}" == "true" ]]; then
-		echo "Can't bootstrap ${HELM} chart" >> ${TERM_LOG}
-		echo "Error: bootstrap flag can't be set with helm version 2 charts, please remove the bootstrap flag and update the chart"
-		exit 1
-	fi
-	HELM="helm_v2"
-	NAME_ARG="--name"
-	JQ_CMD='"\(.Releases[0].AppVersion),\(.Releases[0].Status)"'
+if [[ "${HELM_VERSION}" == "v2" ]]; then
+	echo "Helm v2 is EOL effective 2020-11-13; upgrade your chart to helm v3" >> ${TERM_LOG}
+	echo "Helm v2 is EOL effective 2020-11-13; upgrade your chart to helm v3"
+	exit 1
 fi
 
 shopt -s nullglob
@@ -211,11 +170,7 @@ if [[ -f "/tmp/ca-file.pem" ]]; then
 fi
 
 if [[ -n "${TIMEOUT}" ]]; then
-	if [[ "${HELM}" == "helm_v3" ]]; then
-		TIMEOUT_ARG="--timeout ${TIMEOUT}"
-	else
-		echo "Warning: timeout flag can't be set with version 2 charts, using default timeout"
-	fi
+	TIMEOUT_ARG="--timeout ${TIMEOUT}"
 fi
 
 helm_content_decode
diff --git a/package/Dockerfile b/package/Dockerfile
index 431fe20..30618ce 100644
--- a/package/Dockerfile
+++ b/package/Dockerfile
@@ -1,16 +1,13 @@
 FROM alpine:3.20 as extract
 RUN apk add -U curl ca-certificates
 ARG ARCH
-RUN curl -sL https://get.helm.sh/helm-v2.17.0-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
-RUN mv /usr/bin/helm /usr/bin/helm_v2
 RUN curl -sL https://get.helm.sh/helm-v3.15.3-linux-${ARCH}.tar.gz | tar xvzf - --strip-components=1 -C /usr/bin
-RUN mv /usr/bin/helm /usr/bin/helm_v3
 COPY entry /usr/bin/
 
 FROM golang:1.22-alpine3.20 as plugins
 RUN apk add -U curl ca-certificates build-base binutils-gold
 ARG ARCH
-COPY --from=extract /usr/bin/helm_v3 /usr/bin/helm
+COPY --from=extract /usr/bin/helm /usr/bin/helm
 RUN mkdir -p /go/src/github.com/k3s-io/helm-set-status && \
     curl -sL https://github.com/k3s-io/helm-set-status/archive/refs/tags/v0.2.0.tar.gz | tar xvzf - --strip-components=1 -C /go/src/github.com/k3s-io/helm-set-status && \
     cd /go/src/github.com/k3s-io/helm-set-status && \
@@ -37,7 +34,7 @@ RUN apk --no-cache upgrade && \
     adduser -D -u 1000 -s /bin/bash klipper-helm
 WORKDIR /home/klipper-helm
 COPY --chown=1000:1000 --from=plugins /root/.local/share/helm/plugins/ /home/klipper-helm/.local/share/helm/plugins/
-COPY --from=extract /usr/bin/helm_v2 /usr/bin/helm_v3 /usr/bin/tiller /usr/bin/entry /usr/bin/
+COPY --from=extract /usr/bin/helm /usr/bin/entry /usr/bin/
 ENTRYPOINT ["entry"]
 ENV STABLE_REPO_URL=https://charts.helm.sh/stable/
 ENV TIMEOUT=