vendor the helm script

some-natalie · Nov 16, 2024 · fa95da4 · fa95da4
1 parent d83e714
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diff --git a/images/rootless-ubuntu-jammy.Dockerfile b/images/rootless-ubuntu-jammy.Dockerfile
@@ -82,7 +82,8 @@ COPY images/software/kubectl.sh /kubectl.sh
 RUN bash /kubectl.sh && rm /kubectl.sh
 
 # Install helm
-RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+COPY images/software/get-helm.sh /helm.sh
+RUN bash /helm.sh && rm /helm.sh
 
 # Install Docker
 RUN export DOCKER_ARCH=x86_64 \

diff --git a/images/rootless-ubuntu-numbat.Dockerfile b/images/rootless-ubuntu-numbat.Dockerfile
@@ -83,7 +83,8 @@ COPY images/software/kubectl.sh /kubectl.sh
 RUN bash /kubectl.sh && rm /kubectl.sh
 
 # Install helm
-RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+COPY images/software/get-helm.sh /helm.sh
+RUN bash /helm.sh && rm /helm.sh
 
 # Install Docker
 RUN export DOCKER_ARCH=x86_64 \

diff --git a/images/software/get-helm.sh b/images/software/get-helm.sh
@@ -0,0 +1,347 @@
+#!/usr/bin/env bash
+
+# Copyright The Helm Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The install script is based off of the MIT-licensed script from glide,
+# the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get
+
+: ${BINARY_NAME:="helm"}
+: ${USE_SUDO:="true"}
+: ${DEBUG:="false"}
+: ${VERIFY_CHECKSUM:="true"}
+: ${VERIFY_SIGNATURES:="false"}
+: ${HELM_INSTALL_DIR:="/usr/local/bin"}
+: ${GPG_PUBRING:="pubring.kbx"}
+
+HAS_CURL="$(type "curl" &> /dev/null && echo true || echo false)"
+HAS_WGET="$(type "wget" &> /dev/null && echo true || echo false)"
+HAS_OPENSSL="$(type "openssl" &> /dev/null && echo true || echo false)"
+HAS_GPG="$(type "gpg" &> /dev/null && echo true || echo false)"
+HAS_GIT="$(type "git" &> /dev/null && echo true || echo false)"
+HAS_TAR="$(type "tar" &> /dev/null && echo true || echo false)"
+
+# initArch discovers the architecture for this system.
+initArch() {
+  ARCH=$(uname -m)
+  case $ARCH in
+    armv5*) ARCH="armv5";;
+    armv6*) ARCH="armv6";;
+    armv7*) ARCH="arm";;
+    aarch64) ARCH="arm64";;
+    x86) ARCH="386";;
+    x86_64) ARCH="amd64";;
+    i686) ARCH="386";;
+    i386) ARCH="386";;
+  esac
+}
+
+# initOS discovers the operating system for this system.
+initOS() {
+  OS=$(echo `uname`|tr '[:upper:]' '[:lower:]')
+
+  case "$OS" in
+    # Minimalist GNU for Windows
+    mingw*|cygwin*) OS='windows';;
+  esac
+}
+
+# runs the given command as root (detects if we are root already)
+runAsRoot() {
+  if [ $EUID -ne 0 -a "$USE_SUDO" = "true" ]; then
+    sudo "${@}"
+  else
+    "${@}"
+  fi
+}
+
+# verifySupported checks that the os/arch combination is supported for
+# binary builds, as well whether or not necessary tools are present.
+verifySupported() {
+  local supported="darwin-amd64\ndarwin-arm64\nlinux-386\nlinux-amd64\nlinux-arm\nlinux-arm64\nlinux-ppc64le\nlinux-s390x\nlinux-riscv64\nwindows-amd64\nwindows-arm64"
+  if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then
+    echo "No prebuilt binary for ${OS}-${ARCH}."
+    echo "To build from source, go to https://github.com/helm/helm"
+    exit 1
+  fi
+
+  if [ "${HAS_CURL}" != "true" ] && [ "${HAS_WGET}" != "true" ]; then
+    echo "Either curl or wget is required"
+    exit 1
+  fi
+
+  if [ "${VERIFY_CHECKSUM}" == "true" ] && [ "${HAS_OPENSSL}" != "true" ]; then
+    echo "In order to verify checksum, openssl must first be installed."
+    echo "Please install openssl or set VERIFY_CHECKSUM=false in your environment."
+    exit 1
+  fi
+
+  if [ "${VERIFY_SIGNATURES}" == "true" ]; then
+    if [ "${HAS_GPG}" != "true" ]; then
+      echo "In order to verify signatures, gpg must first be installed."
+      echo "Please install gpg or set VERIFY_SIGNATURES=false in your environment."
+      exit 1
+    fi
+    if [ "${OS}" != "linux" ]; then
+      echo "Signature verification is currently only supported on Linux."
+      echo "Please set VERIFY_SIGNATURES=false or verify the signatures manually."
+      exit 1
+    fi
+  fi
+
+  if [ "${HAS_GIT}" != "true" ]; then
+    echo "[WARNING] Could not find git. It is required for plugin installation."
+  fi
+
+  if [ "${HAS_TAR}" != "true" ]; then
+    echo "[ERROR] Could not find tar. It is required to extract the helm binary archive."
+    exit 1
+  fi
+}
+
+# checkDesiredVersion checks if the desired version is available.
+checkDesiredVersion() {
+  if [ "x$DESIRED_VERSION" == "x" ]; then
+    # Get tag from release URL
+    local latest_release_url="https://get.helm.sh/helm-latest-version"
+    local latest_release_response=""
+    if [ "${HAS_CURL}" == "true" ]; then
+      latest_release_response=$( curl -L --silent --show-error --fail "$latest_release_url" 2>&1 || true )
+    elif [ "${HAS_WGET}" == "true" ]; then
+      latest_release_response=$( wget "$latest_release_url" -q -O - 2>&1 || true )
+    fi
+    TAG=$( echo "$latest_release_response" | grep '^v[0-9]' )
+    if [ "x$TAG" == "x" ]; then
+      printf "Could not retrieve the latest release tag information from %s: %s\n" "${latest_release_url}" "${latest_release_response}"
+      exit 1
+    fi
+  else
+    TAG=$DESIRED_VERSION
+  fi
+}
+
+# checkHelmInstalledVersion checks which version of helm is installed and
+# if it needs to be changed.
+checkHelmInstalledVersion() {
+  if [[ -f "${HELM_INSTALL_DIR}/${BINARY_NAME}" ]]; then
+    local version=$("${HELM_INSTALL_DIR}/${BINARY_NAME}" version --template="{{ .Version }}")
+    if [[ "$version" == "$TAG" ]]; then
+      echo "Helm ${version} is already ${DESIRED_VERSION:-latest}"
+      return 0
+    else
+      echo "Helm ${TAG} is available. Changing from version ${version}."
+      return 1
+    fi
+  else
+    return 1
+  fi
+}
+
+# downloadFile downloads the latest binary package and also the checksum
+# for that binary.
+downloadFile() {
+  HELM_DIST="helm-$TAG-$OS-$ARCH.tar.gz"
+  DOWNLOAD_URL="https://get.helm.sh/$HELM_DIST"
+  CHECKSUM_URL="$DOWNLOAD_URL.sha256"
+  HELM_TMP_ROOT="$(mktemp -dt helm-installer-XXXXXX)"
+  HELM_TMP_FILE="$HELM_TMP_ROOT/$HELM_DIST"
+  HELM_SUM_FILE="$HELM_TMP_ROOT/$HELM_DIST.sha256"
+  echo "Downloading $DOWNLOAD_URL"
+  if [ "${HAS_CURL}" == "true" ]; then
+    curl -SsL "$CHECKSUM_URL" -o "$HELM_SUM_FILE"
+    curl -SsL "$DOWNLOAD_URL" -o "$HELM_TMP_FILE"
+  elif [ "${HAS_WGET}" == "true" ]; then
+    wget -q -O "$HELM_SUM_FILE" "$CHECKSUM_URL"
+    wget -q -O "$HELM_TMP_FILE" "$DOWNLOAD_URL"
+  fi
+}
+
+# verifyFile verifies the SHA256 checksum of the binary package
+# and the GPG signatures for both the package and checksum file
+# (depending on settings in environment).
+verifyFile() {
+  if [ "${VERIFY_CHECKSUM}" == "true" ]; then
+    verifyChecksum
+  fi
+  if [ "${VERIFY_SIGNATURES}" == "true" ]; then
+    verifySignatures
+  fi
+}
+
+# installFile installs the Helm binary.
+installFile() {
+  HELM_TMP="$HELM_TMP_ROOT/$BINARY_NAME"
+  mkdir -p "$HELM_TMP"
+  tar xf "$HELM_TMP_FILE" -C "$HELM_TMP"
+  HELM_TMP_BIN="$HELM_TMP/$OS-$ARCH/helm"
+  echo "Preparing to install $BINARY_NAME into ${HELM_INSTALL_DIR}"
+  runAsRoot cp "$HELM_TMP_BIN" "$HELM_INSTALL_DIR/$BINARY_NAME"
+  echo "$BINARY_NAME installed into $HELM_INSTALL_DIR/$BINARY_NAME"
+}
+
+# verifyChecksum verifies the SHA256 checksum of the binary package.
+verifyChecksum() {
+  printf "Verifying checksum... "
+  local sum=$(openssl sha1 -sha256 ${HELM_TMP_FILE} | awk '{print $2}')
+  local expected_sum=$(cat ${HELM_SUM_FILE})
+  if [ "$sum" != "$expected_sum" ]; then
+    echo "SHA sum of ${HELM_TMP_FILE} does not match. Aborting."
+    exit 1
+  fi
+  echo "Done."
+}
+
+# verifySignatures obtains the latest KEYS file from GitHub main branch
+# as well as the signature .asc files from the specific GitHub release,
+# then verifies that the release artifacts were signed by a maintainer's key.
+verifySignatures() {
+  printf "Verifying signatures... "
+  local keys_filename="KEYS"
+  local github_keys_url="https://raw.githubusercontent.com/helm/helm/main/${keys_filename}"
+  if [ "${HAS_CURL}" == "true" ]; then
+    curl -SsL "${github_keys_url}" -o "${HELM_TMP_ROOT}/${keys_filename}"
+  elif [ "${HAS_WGET}" == "true" ]; then
+    wget -q -O "${HELM_TMP_ROOT}/${keys_filename}" "${github_keys_url}"
+  fi
+  local gpg_keyring="${HELM_TMP_ROOT}/keyring.gpg"
+  local gpg_homedir="${HELM_TMP_ROOT}/gnupg"
+  mkdir -p -m 0700 "${gpg_homedir}"
+  local gpg_stderr_device="/dev/null"
+  if [ "${DEBUG}" == "true" ]; then
+    gpg_stderr_device="/dev/stderr"
+  fi
+  gpg --batch --quiet --homedir="${gpg_homedir}" --import "${HELM_TMP_ROOT}/${keys_filename}" 2> "${gpg_stderr_device}"
+  gpg --batch --no-default-keyring --keyring "${gpg_homedir}/${GPG_PUBRING}" --export > "${gpg_keyring}"
+  local github_release_url="https://github.com/helm/helm/releases/download/${TAG}"
+  if [ "${HAS_CURL}" == "true" ]; then
+    curl -SsL "${github_release_url}/helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256.asc" -o "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256.asc"
+    curl -SsL "${github_release_url}/helm-${TAG}-${OS}-${ARCH}.tar.gz.asc" -o "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.asc"
+  elif [ "${HAS_WGET}" == "true" ]; then
+    wget -q -O "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256.asc" "${github_release_url}/helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256.asc"
+    wget -q -O "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.asc" "${github_release_url}/helm-${TAG}-${OS}-${ARCH}.tar.gz.asc"
+  fi
+  local error_text="If you think this might be a potential security issue,"
+  error_text="${error_text}\nplease see here: https://github.com/helm/community/blob/master/SECURITY.md"
+  local num_goodlines_sha=$(gpg --verify --keyring="${gpg_keyring}" --status-fd=1 "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256.asc" 2> "${gpg_stderr_device}" | grep -c -E '^\[GNUPG:\] (GOODSIG|VALIDSIG)')
+  if [[ ${num_goodlines_sha} -lt 2 ]]; then
+    echo "Unable to verify the signature of helm-${TAG}-${OS}-${ARCH}.tar.gz.sha256!"
+    echo -e "${error_text}"
+    exit 1
+  fi
+  local num_goodlines_tar=$(gpg --verify --keyring="${gpg_keyring}" --status-fd=1 "${HELM_TMP_ROOT}/helm-${TAG}-${OS}-${ARCH}.tar.gz.asc" 2> "${gpg_stderr_device}" | grep -c -E '^\[GNUPG:\] (GOODSIG|VALIDSIG)')
+  if [[ ${num_goodlines_tar} -lt 2 ]]; then
+    echo "Unable to verify the signature of helm-${TAG}-${OS}-${ARCH}.tar.gz!"
+    echo -e "${error_text}"
+    exit 1
+  fi
+  echo "Done."
+}
+
+# fail_trap is executed if an error occurs.
+fail_trap() {
+  result=$?
+  if [ "$result" != "0" ]; then
+    if [[ -n "$INPUT_ARGUMENTS" ]]; then
+      echo "Failed to install $BINARY_NAME with the arguments provided: $INPUT_ARGUMENTS"
+      help
+    else
+      echo "Failed to install $BINARY_NAME"
+    fi
+    echo -e "\tFor support, go to https://github.com/helm/helm."
+  fi
+  cleanup
+  exit $result
+}
+
+# testVersion tests the installed client to make sure it is working.
+testVersion() {
+  set +e
+  HELM="$(command -v $BINARY_NAME)"
+  if [ "$?" = "1" ]; then
+    echo "$BINARY_NAME not found. Is $HELM_INSTALL_DIR on your "'$PATH?'
+    exit 1
+  fi
+  set -e
+}
+
+# help provides possible cli installation arguments
+help () {
+  echo "Accepted cli arguments are:"
+  echo -e "\t[--help|-h ] ->> prints this help"
+  echo -e "\t[--version|-v <desired_version>] . When not defined it fetches the latest release from GitHub"
+  echo -e "\te.g. --version v3.0.0 or -v canary"
+  echo -e "\t[--no-sudo]  ->> install without sudo"
+}
+
+# cleanup temporary files to avoid https://github.com/helm/helm/issues/2977
+cleanup() {
+  if [[ -d "${HELM_TMP_ROOT:-}" ]]; then
+    rm -rf "$HELM_TMP_ROOT"
+  fi
+}
+
+# Execution
+
+#Stop execution on any error
+trap "fail_trap" EXIT
+set -e
+
+# Set debug if desired
+if [ "${DEBUG}" == "true" ]; then
+  set -x
+fi
+
+# Parsing input arguments (if any)
+export INPUT_ARGUMENTS="${@}"
+set -u
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    '--version'|-v)
+       shift
+       if [[ $# -ne 0 ]]; then
+           export DESIRED_VERSION="${1}"
+           if [[ "$1" != "v"* ]]; then
+               echo "Expected version arg ('${DESIRED_VERSION}') to begin with 'v', fixing..."
+               export DESIRED_VERSION="v${1}"
+           fi
+       else
+           echo -e "Please provide the desired version. e.g. --version v3.0.0 or -v canary"
+           exit 0
+       fi
+       ;;
+    '--no-sudo')
+       USE_SUDO="false"
+       ;;
+    '--help'|-h)
+       help
+       exit 0
+       ;;
+    *) exit 1
+       ;;
+  esac
+  shift
+done
+set +u
+
+initArch
+initOS
+verifySupported
+checkDesiredVersion
+if ! checkHelmInstalledVersion; then
+  downloadFile
+  verifyFile
+  installFile
+fi
+testVersion
+cleanup
diff --git a/images/ubi8.Dockerfile b/images/ubi8.Dockerfile
@@ -59,7 +59,8 @@ COPY images/software/kubectl.sh kubectl.sh
 RUN bash kubectl.sh && rm kubectl.sh
 
 # Install helm
-RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+COPY images/software/get-helm.sh /helm.sh
+RUN bash /helm.sh && rm /helm.sh
 
 RUN test -n "$TARGETPLATFORM" || (echo "TARGETPLATFORM must be set" && false)
 

diff --git a/images/ubi9.Dockerfile b/images/ubi9.Dockerfile
@@ -59,7 +59,8 @@ COPY images/software/kubectl.sh kubectl.sh
 RUN bash kubectl.sh && rm kubectl.sh
 
 # Install helm
-RUN curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+COPY images/software/get-helm.sh /helm.sh
+RUN bash /helm.sh && rm /helm.sh
 
 RUN test -n "$TARGETPLATFORM" || (echo "TARGETPLATFORM must be set" && false)