add install script
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iwilltry42
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e419ed0ec0
commit
342a364d45
@ -47,5 +47,5 @@ Example Workflow: Create a new cluster and use it with `kubectl`
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- [ ] Use the docker client library instead of commands
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- [ ] Test the docker version
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- [ ] Improve cluster state management
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- [ ] Use [hsirupsen/logrus](https://github.com/sirupsen/logrus) for prettier logs
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- [ ] Use [sirupsen/logrus](https://github.com/sirupsen/logrus) for prettier logs
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- [ ] Add install script
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187
install.sh
Executable file
187
install.sh
Executable file
@ -0,0 +1,187 @@
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#!/usr/bin/env bash
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APP_NAME="k3d"
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REPO_URL="https://github.com/iwilltry42/k3d-go"
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: ${USE_SUDO:="true"}
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: ${K3D_INSTALL_DIR:="/usr/local/bin"}
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# initArch discovers the architecture for this system.
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initArch() {
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ARCH=$(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\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 $REPO_URL"
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exit 1
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fi
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if ! type "curl" > /dev/null && ! type "wget" > /dev/null; then
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echo "Either curl or wget is required"
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exit 1
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fi
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}
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# checkK3dInstalledVersion checks which version of k3d is installed and
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# if it needs to be changed.
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checkK3dInstalledVersion() {
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if [[ -f "${K3D_INSTALL_DIR}/${APP_NAME}" ]]; then
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local version=$(k3d --version | cut -d " " -f3)
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if [[ "$version" == "$TAG" ]]; then
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echo "k3d ${version} is already ${DESIRED_VERSION:-latest}"
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return 0
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else
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echo "k3d ${TAG} is available. Changing from version ${version}."
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return 1
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fi
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else
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return 1
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fi
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}
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# checkLatestVersion grabs the latest version string from the releases
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checkLatestVersion() {
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local latest_release_url="$REPO_URL/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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}
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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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K3D_DIST="k3d-$OS-$ARCH"
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DOWNLOAD_URL="$REPO_URL/releases/download/$TAG/$K3D_DIST"
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K3D_TMP_ROOT="$(mktemp -dt k3d-binary-XXXXXX)"
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K3D_TMP_FILE="$K3D_TMP_ROOT/$K3D_DIST"
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if type "curl" > /dev/null; then
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curl -SsL "$DOWNLOAD_URL" -o "$K3D_TMP_FILE"
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elif type "wget" > /dev/null; then
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wget -q -O "$K3D_TMP_FILE" "$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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echo "Preparing to install $APP_NAME into ${K3D_INSTALL_DIR}"
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runAsRoot chmod +x "$K3D_TMP_FILE"
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runAsRoot cp "$K3D_TMP_FILE" "$K3D_INSTALL_DIR/$APP_NAME"
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echo "$APP_NAME installed into $K3D_INSTALL_DIR/$APP_NAME"
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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 $APP_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 $APP_NAME"
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fi
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echo -e "\tFor support, go to $REPO_URL."
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fi
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cleanup
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exit $result
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}
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# testVersion tests the installed client to make sure it is working.
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testVersion() {
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set +e
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K3D="$(which $APP_NAME)"
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if [ "$?" = "1" ]; then
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echo "$APP_NAME not found. Is $K3D_INSTALL_DIR on your "'$PATH?'
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exit 1
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fi
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set -e
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echo "Run '$APP_NAME --help' to see what you can do with it."
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}
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# help provides possible cli installation arguments
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help () {
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echo "Accepted cli arguments are:"
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echo -e "\t[--help|-h ] ->> prints this help"
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echo -e "\t[--no-sudo] ->> install without sudo"
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}
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# cleanup temporary files
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cleanup() {
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if [[ -d "${K3D_TMP_ROOT:-}" ]]; then
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rm -rf "$K3D_TMP_ROOT"
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fi
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}
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# Execution
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#Stop execution on any error
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trap "fail_trap" EXIT
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set -e
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# Parsing input arguments (if any)
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export INPUT_ARGUMENTS="${@}"
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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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'--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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checkLatestVersion
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if ! checkK3dInstalledVersion; 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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