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April 15, 2022 13:36
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install-helm-diff.sh
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| #!/usr/bin/env sh | |
| # Shamelessly copied from https://github.com/technosophos/helm-template | |
| PROJECT_NAME="helm-diff" | |
| PROJECT_GH="databus23/$PROJECT_NAME" | |
| export GREP_COLOR="never" | |
| # Convert HELM_BIN and HELM_PLUGIN_DIR to unix if cygpath is | |
| # available. This is the case when using MSYS2 or Cygwin | |
| # on Windows where helm returns a Windows path but we | |
| # need a Unix path | |
| if command -v cygpath >/dev/null 2>&1; then | |
| HELM_BIN="$(cygpath -u "${HELM_BIN}")" | |
| HELM_PLUGIN_DIR="$(cygpath -u "${HELM_PLUGIN_DIR}")" | |
| fi | |
| [ -z "$HELM_BIN" ] && HELM_BIN=$(command -v helm) | |
| [ -z "$HELM_HOME" ] && HELM_HOME=$(helm env | grep 'HELM_DATA_HOME' | cut -d '=' -f2 | tr -d '"') | |
| mkdir -p "$HELM_HOME" | |
| : "${HELM_PLUGIN_DIR:="$HELM_HOME/plugins/helm-diff"}" | |
| if [ "$SKIP_BIN_INSTALL" = "1" ]; then | |
| echo "Skipping binary install" | |
| exit | |
| fi | |
| # which mode is the common installer script running in | |
| SCRIPT_MODE="install" | |
| if [ "$1" = "-u" ]; then | |
| SCRIPT_MODE="update" | |
| fi | |
| # initArch discovers the architecture for this system. | |
| initArch() { | |
| ARCH=$(uname -m) | |
| case $ARCH in | |
| armv5*) ARCH="armv5" ;; | |
| armv6*) ARCH="armv6" ;; | |
| armv7*) ARCH="armv7" ;; | |
| aarch64) ARCH="arm64" ;; | |
| x86) ARCH="386" ;; | |
| x86_64) ARCH="amd64" ;; | |
| i686) ARCH="386" ;; | |
| i386) ARCH="386" ;; | |
| esac | |
| } | |
| # initOS discovers the operating system for this system. | |
| initOS() { | |
| OS=$(uname -s) | |
| case "$OS" in | |
| # Msys support | |
| MSYS*) OS='windows' ;; | |
| # Minimalist GNU for Windows | |
| MINGW*) OS='windows' ;; | |
| CYGWIN*) OS='windows' ;; | |
| Darwin) OS='macos' ;; | |
| Linux) OS='linux' ;; | |
| esac | |
| } | |
| # verifySupported checks that the os/arch combination is supported for | |
| # binary builds. | |
| verifySupported() { | |
| supported="linux-amd64\nlinux-arm64\nfreebsd-amd64\nmacos-amd64\nmacos-arm64\nwindows-amd64" | |
| if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then | |
| echo "No prebuild binary for ${OS}-${ARCH}." | |
| exit 1 | |
| fi | |
| if | |
| ! command -v curl >/dev/null 2>&1 && ! command -v wget >/dev/null 2>&1 | |
| then | |
| echo "Either curl or wget is required" | |
| exit 1 | |
| fi | |
| } | |
| # getDownloadURL checks the latest available version. | |
| getDownloadURL() { | |
| version=$(git -C "$HELM_PLUGIN_DIR" describe --tags --exact-match 2>/dev/null || :) | |
| if [ "$SCRIPT_MODE" = "install" ] && [ -n "$version" ]; then | |
| DOWNLOAD_URL="https://github.com/$PROJECT_GH/releases/download/$version/helm-diff-$OS-$ARCH.tgz" | |
| else | |
| DOWNLOAD_URL="https://github.com/$PROJECT_GH/releases/latest/download/helm-diff-$OS-$ARCH.tgz" | |
| fi | |
| } | |
| # Temporary dir | |
| mkTempDir() { | |
| HELM_TMP="$(mktemp -d -t "${PROJECT_NAME}-XXXXXX")" | |
| } | |
| rmTempDir() { | |
| if [ -d "${HELM_TMP:-/tmp/helm-diff-tmp}" ]; then | |
| rm -rf "${HELM_TMP:-/tmp/helm-diff-tmp}" | |
| fi | |
| } | |
| # downloadFile downloads the latest binary package and also the checksum | |
| # for that binary. | |
| downloadFile() { | |
| PLUGIN_TMP_FILE="${HELM_TMP}/${PROJECT_NAME}.tgz" | |
| echo "Downloading $DOWNLOAD_URL" | |
| if | |
| command -v curl >/dev/null 2>&1 | |
| then | |
| curl -sSf -L "$DOWNLOAD_URL" >"$PLUGIN_TMP_FILE" | |
| elif | |
| command -v wget >/dev/null 2>&1 | |
| then | |
| wget -q -O - "$DOWNLOAD_URL" >"$PLUGIN_TMP_FILE" | |
| fi | |
| } | |
| # installFile verifies the SHA256 for the file, then unpacks and | |
| # installs it. | |
| installFile() { | |
| tar xzf "$PLUGIN_TMP_FILE" -C "$HELM_TMP" | |
| HELM_TMP_BIN="$HELM_TMP/diff/bin/diff" | |
| echo "Preparing to install into ${HELM_PLUGIN_DIR}" | |
| mkdir -p "$HELM_PLUGIN_DIR/bin" | |
| cp "$HELM_TMP_BIN" "$HELM_PLUGIN_DIR/bin" | |
| } | |
| # exit_trap is executed if on exit (error or not). | |
| exit_trap() { | |
| result=$? | |
| rmTempDir | |
| if [ "$result" != "0" ]; then | |
| echo "Failed to install $PROJECT_NAME" | |
| printf '\tFor support, go to https://github.com/databus23/helm-diff.\n' | |
| fi | |
| exit $result | |
| } | |
| # testVersion tests the installed client to make sure it is working. | |
| testVersion() { | |
| set +e | |
| echo "$PROJECT_NAME installed into $HELM_PLUGIN_DIR/$PROJECT_NAME" | |
| "${HELM_PLUGIN_DIR}/bin/diff" -h | |
| set -e | |
| } | |
| # Execution | |
| #Stop execution on any error | |
| trap "exit_trap" EXIT | |
| set -e | |
| initArch | |
| initOS | |
| verifySupported | |
| getDownloadURL | |
| mkTempDir | |
| downloadFile | |
| installFile | |
| testVersion |
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