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246 lines
6.9 KiB
246 lines
6.9 KiB
#!/usr/bin/env bash
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# Copyright The Helm Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# The install script is based off of the MIT-licensed script from glide,
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# the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get
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PROJECT_NAME="helm"
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TILLER_NAME="tiller"
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: ${USE_SUDO:="true"}
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: ${HELM_INSTALL_DIR:="/usr/local/bin"}
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# initArch discovers the architecture for this system.
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initArch() {
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ARCH=$(uname -m)
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case $ARCH in
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armv5*) ARCH="armv5";;
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armv6*) ARCH="armv6";;
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armv7*) ARCH="arm";;
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aarch64) ARCH="arm64";;
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x86) ARCH="386";;
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x86_64) ARCH="amd64";;
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i686) ARCH="386";;
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i386) ARCH="386";;
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esac
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}
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# initOS discovers the operating system for this system.
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initOS() {
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OS=$(echo `uname`|tr '[:upper:]' '[:lower:]')
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case "$OS" in
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# Minimalist GNU for Windows
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mingw*) OS='windows';;
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esac
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}
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# runs the given command as root (detects if we are root already)
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runAsRoot() {
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local CMD="$*"
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if [ $EUID -ne 0 -a $USE_SUDO = "true" ]; then
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CMD="sudo $CMD"
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fi
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$CMD
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}
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# verifySupported checks that the os/arch combination is supported for
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# binary builds.
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verifySupported() {
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local supported="darwin-386\ndarwin-amd64\nlinux-386\nlinux-amd64\nlinux-arm\nlinux-arm64\nlinux-ppc64le\nwindows-386\nwindows-amd64"
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if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then
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echo "No prebuilt binary for ${OS}-${ARCH}."
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echo "To build from source, go to https://github.com/helm/helm"
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exit 1
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fi
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if ! type "curl" > /dev/null && ! type "wget" > /dev/null; then
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echo "Either curl or wget is required"
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exit 1
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fi
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}
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# checkDesiredVersion checks if the desired version is available.
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checkDesiredVersion() {
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if [ "x$DESIRED_VERSION" == "x" ]; then
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# Get tag from release URL
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local latest_release_url="https://github.com/helm/helm/releases/latest"
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if type "curl" > /dev/null; then
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TAG=$(curl -Ls -o /dev/null -w %{url_effective} $latest_release_url | grep -oE "[^/]+$" )
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elif type "wget" > /dev/null; then
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TAG=$(wget $latest_release_url --server-response -O /dev/null 2>&1 | awk '/^ Location: /{DEST=$2} END{ print DEST}' | grep -oE "[^/]+$")
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fi
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else
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TAG=$DESIRED_VERSION
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fi
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}
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# checkHelmInstalledVersion checks which version of helm is installed and
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# if it needs to be changed.
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checkHelmInstalledVersion() {
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if [[ -f "${HELM_INSTALL_DIR}/${PROJECT_NAME}" ]]; then
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local version=$("${HELM_INSTALL_DIR}/${PROJECT_NAME}" version -c | grep '^Client' | cut -d'"' -f2)
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if [[ "$version" == "$TAG" ]]; then
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echo "Helm ${version} is already ${DESIRED_VERSION:-latest}"
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return 0
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else
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echo "Helm ${TAG} is available. Changing from version ${version}."
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return 1
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fi
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else
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return 1
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fi
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}
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# downloadFile downloads the latest binary package and also the checksum
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# for that binary.
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downloadFile() {
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HELM_DIST="helm-$TAG-$OS-$ARCH.tar.gz"
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DOWNLOAD_URL="https://get.helm.sh/$HELM_DIST"
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CHECKSUM_URL="$DOWNLOAD_URL.sha256"
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HELM_TMP_ROOT="$(mktemp -dt helm-installer-XXXXXX)"
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HELM_TMP_FILE="$HELM_TMP_ROOT/$HELM_DIST"
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HELM_SUM_FILE="$HELM_TMP_ROOT/$HELM_DIST.sha256"
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echo "Downloading $DOWNLOAD_URL"
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if type "curl" > /dev/null; then
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curl -SsL "$CHECKSUM_URL" -o "$HELM_SUM_FILE"
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elif type "wget" > /dev/null; then
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wget -q -O "$HELM_SUM_FILE" "$CHECKSUM_URL"
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fi
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if type "curl" > /dev/null; then
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curl -SsL "$DOWNLOAD_URL" -o "$HELM_TMP_FILE"
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elif type "wget" > /dev/null; then
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wget -q -O "$HELM_TMP_FILE" "$DOWNLOAD_URL"
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fi
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}
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# installFile verifies the SHA256 for the file, then unpacks and
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# installs it.
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installFile() {
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HELM_TMP="$HELM_TMP_ROOT/$PROJECT_NAME"
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local sum=$(openssl sha1 -sha256 ${HELM_TMP_FILE} | awk '{print $2}')
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local expected_sum=$(cat ${HELM_SUM_FILE})
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if [ "$sum" != "$expected_sum" ]; then
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echo "SHA sum of ${HELM_TMP_FILE} does not match. Aborting."
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exit 1
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fi
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mkdir -p "$HELM_TMP"
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tar xf "$HELM_TMP_FILE" -C "$HELM_TMP"
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HELM_TMP_BIN="$HELM_TMP/$OS-$ARCH/$PROJECT_NAME"
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TILLER_TMP_BIN="$HELM_TMP/$OS-$ARCH/$TILLER_NAME"
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echo "Preparing to install $PROJECT_NAME and $TILLER_NAME into ${HELM_INSTALL_DIR}"
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runAsRoot cp "$HELM_TMP_BIN" "$HELM_INSTALL_DIR"
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echo "$PROJECT_NAME installed into $HELM_INSTALL_DIR/$PROJECT_NAME"
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if [ -x "$TILLER_TMP_BIN" ]; then
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runAsRoot cp "$TILLER_TMP_BIN" "$HELM_INSTALL_DIR"
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echo "$TILLER_NAME installed into $HELM_INSTALL_DIR/$TILLER_NAME"
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else
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echo "info: $TILLER_NAME binary was not found in this release; skipping $TILLER_NAME installation"
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fi
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}
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# fail_trap is executed if an error occurs.
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fail_trap() {
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result=$?
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if [ "$result" != "0" ]; then
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if [[ -n "$INPUT_ARGUMENTS" ]]; then
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echo "Failed to install $PROJECT_NAME with the arguments provided: $INPUT_ARGUMENTS"
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help
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else
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echo "Failed to install $PROJECT_NAME"
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fi
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echo -e "\tFor support, go to https://github.com/helm/helm."
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fi
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cleanup
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exit $result
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}
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# testVersion tests the installed client to make sure it is working.
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testVersion() {
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set +e
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HELM="$(which $PROJECT_NAME)"
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if [ "$?" = "1" ]; then
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echo "$PROJECT_NAME not found. Is $HELM_INSTALL_DIR on your "'$PATH?'
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exit 1
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fi
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set -e
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echo "Run '$PROJECT_NAME init' to configure $PROJECT_NAME."
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}
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# help provides possible cli installation arguments
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help () {
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echo "Accepted cli arguments are:"
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echo -e "\t[--help|-h ] ->> prints this help"
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echo -e "\t[--version|-v <desired_version>] . When not defined it defaults to latest"
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echo -e "\te.g. --version v2.4.0 or -v latest"
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echo -e "\t[--no-sudo] ->> install without sudo"
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}
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# cleanup temporary files to avoid https://github.com/helm/helm/issues/2977
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cleanup() {
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if [[ -d "${HELM_TMP_ROOT:-}" ]]; then
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rm -rf "$HELM_TMP_ROOT"
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fi
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}
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# Execution
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#Stop execution on any error
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trap "fail_trap" EXIT
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set -e
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# Parsing input arguments (if any)
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export INPUT_ARGUMENTS="${@}"
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set -u
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while [[ $# -gt 0 ]]; do
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case $1 in
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'--version'|-v)
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shift
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if [[ $# -ne 0 ]]; then
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export DESIRED_VERSION="${1}"
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else
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echo -e "Please provide the desired version. e.g. --version v2.4.0 or -v latest"
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exit 0
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fi
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;;
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'--no-sudo')
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USE_SUDO="false"
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;;
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'--help'|-h)
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help
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exit 0
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;;
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*) exit 1
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;;
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esac
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shift
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done
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set +u
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initArch
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initOS
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verifySupported
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checkDesiredVersion
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if ! checkHelmInstalledVersion; then
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downloadFile
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installFile
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fi
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testVersion
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cleanup
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