github.com/zoumo/helm@v2.5.0+incompatible/scripts/get (about) 1 #!/bin/bash 2 3 # Copyright 2016 The Kubernetes Authors All rights reserved. 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 17 # The install script is based off of the MIT-licensed script from glide, 18 # the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get 19 20 PROJECT_NAME="helm" 21 22 : ${HELM_INSTALL_DIR:="/usr/local/bin"} 23 24 # initArch discovers the architecture for this system. 25 initArch() { 26 ARCH=$(uname -m) 27 case $ARCH in 28 armv5*) ARCH="armv5";; 29 armv6*) ARCH="armv6";; 30 armv7*) ARCH="armv7";; 31 aarch64) ARCH="arm64";; 32 x86) ARCH="386";; 33 x86_64) ARCH="amd64";; 34 i686) ARCH="386";; 35 i386) ARCH="386";; 36 esac 37 } 38 39 # initOS discovers the operating system for this system. 40 initOS() { 41 OS=$(echo `uname`|tr '[:upper:]' '[:lower:]') 42 43 case "$OS" in 44 # Minimalist GNU for Windows 45 mingw*) OS='windows';; 46 esac 47 } 48 49 # verifySupported checks that the os/arch combination is supported for 50 # binary builds. 51 verifySupported() { 52 local supported="linux-amd64\ndarwin-amd64\nlinux-386" 53 if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then 54 echo "No prebuild binary for ${OS}-${ARCH}." 55 echo "To build from source, go to https://github.com/kubernetes/helm" 56 exit 1 57 fi 58 59 if ! type "curl" > /dev/null && ! type "wget" > /dev/null; then 60 echo "Either curl or wget is required" 61 exit 1 62 fi 63 } 64 65 # checkDesiredVersion checks if the desired version is available. 66 checkDesiredVersion() { 67 # Use the GitHub releases webpage for the project to find the desired version for this project. 68 local release_url="https://github.com/kubernetes/helm/releases/${DESIRED_VERSION:-latest}" 69 if type "curl" > /dev/null; then 70 TAG=$(curl -SsL $release_url | awk '/\/tag\//' | head -n 1 | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}') 71 elif type "wget" > /dev/null; then 72 TAG=$(wget -q -O - $release_url | awk '/\/tag\//' | head -n 1 | cut -d '"' -f 2 | awk '{n=split($NF,a,"/");print a[n]}') 73 fi 74 if [ "x$TAG" == "x" ]; then 75 echo "Cannot determine ${DESIRED_VERSION} tag." 76 exit 1 77 fi 78 } 79 80 # checkHelmInstalledVersion checks which version of helm is installed and 81 # if it needs to be changed. 82 checkHelmInstalledVersion() { 83 if [[ -f "${HELM_INSTALL_DIR}/${PROJECT_NAME}" ]]; then 84 local version=$(helm version | grep '^Client' | cut -d'"' -f2) 85 if [[ "$version" == "$TAG" ]]; then 86 echo "Helm ${version} is already ${DESIRED_VERSION:-latest}" 87 return 0 88 else 89 echo "Helm ${TAG} is available. Changing from version ${version}." 90 return 1 91 fi 92 else 93 return 1 94 fi 95 } 96 97 # downloadFile downloads the latest binary package and also the checksum 98 # for that binary. 99 downloadFile() { 100 HELM_DIST="helm-$TAG-$OS-$ARCH.tar.gz" 101 DOWNLOAD_URL="https://kubernetes-helm.storage.googleapis.com/$HELM_DIST" 102 CHECKSUM_URL="$DOWNLOAD_URL.sha256" 103 HELM_TMP_FILE="/tmp/$HELM_DIST" 104 HELM_SUM_FILE="/tmp/$HELM_DIST.sha256" 105 echo "Downloading $DOWNLOAD_URL" 106 if type "curl" > /dev/null; then 107 curl -SsL "$CHECKSUM_URL" -o "$HELM_SUM_FILE" 108 elif type "wget" > /dev/null; then 109 wget -q -O "$HELM_SUM_FILE" "$CHECKSUM_URL" 110 fi 111 if type "curl" > /dev/null; then 112 curl -SsL "$DOWNLOAD_URL" -o "$HELM_TMP_FILE" 113 elif type "wget" > /dev/null; then 114 wget -q -O "$HELM_TMP_FILE" "$DOWNLOAD_URL" 115 fi 116 } 117 118 # installFile verifies the SHA256 for the file, then unpacks and 119 # installs it. 120 installFile() { 121 HELM_TMP="/tmp/$PROJECT_NAME" 122 local sum=$(openssl sha -sha256 ${HELM_TMP_FILE} | awk '{print $2}') 123 local expected_sum=$(cat ${HELM_SUM_FILE}) 124 if [ "$sum" != "$expected_sum" ]; then 125 echo "SHA sum of $HELM_TMP does not match. Aborting." 126 exit 1 127 fi 128 129 mkdir -p "$HELM_TMP" 130 tar xf "$HELM_TMP_FILE" -C "$HELM_TMP" 131 HELM_TMP_BIN="$HELM_TMP/$OS-$ARCH/$PROJECT_NAME" 132 echo "Preparing to install into ${HELM_INSTALL_DIR} (sudo)" 133 sudo cp "$HELM_TMP_BIN" "$HELM_INSTALL_DIR" 134 } 135 136 # fail_trap is executed if an error occurs. 137 fail_trap() { 138 result=$? 139 if [ "$result" != "0" ]; then 140 if [[ -n "$INPUT_ARGUMENTS" ]]; then 141 echo "Failed to install $PROJECT_NAME with the arguments provided: $INPUT_ARGUMENTS" 142 help 143 else 144 echo "Failed to install $PROJECT_NAME" 145 fi 146 echo -e "\tFor support, go to https://github.com/kubernetes/helm." 147 fi 148 exit $result 149 } 150 151 # testVersion tests the installed client to make sure it is working. 152 testVersion() { 153 set +e 154 echo "$PROJECT_NAME installed into $HELM_INSTALL_DIR/$PROJECT_NAME" 155 HELM="$(which $PROJECT_NAME)" 156 if [ "$?" = "1" ]; then 157 echo "$PROJECT_NAME not found. Is $HELM_INSTALL_DIR on your "'$PATH?' 158 exit 1 159 fi 160 set -e 161 echo "Run '$PROJECT_NAME init' to configure $PROJECT_NAME." 162 } 163 164 # help provides possible cli installation arguments 165 help () { 166 echo "Accepted cli arguments are:" 167 echo -e "\t[--help|-h ] ->> prints this help" 168 echo -e "\t[--version|-v <desired_version>] . When not defined it defaults to latest" 169 echo -e "\te.g. --version v2.4.0 or -v latest" 170 } 171 172 # Execution 173 174 #Stop execution on any error 175 trap "fail_trap" EXIT 176 set -e 177 178 # Parsing input arguments (if any) 179 export INPUT_ARGUMENTS="${@}" 180 set -u 181 while [[ $# -gt 0 ]]; do 182 case $1 in 183 '--version'|-v) 184 export DESIRED_VERSION="${2}" 185 shift 186 ;; 187 '--help'|-h) 188 help 189 exit 0 190 ;; 191 *) exit 1 192 ;; 193 esac 194 shift 195 done 196 set +u 197 198 initArch 199 initOS 200 verifySupported 201 checkDesiredVersion 202 if ! checkHelmInstalledVersion; then 203 downloadFile 204 installFile 205 fi 206 testVersion