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| #!/bin/bash | |
| # Check privileges | |
| if [[ "$(id -u)" -ne 0 ]] | |
| then echo Please run this script as root or using sudo! | |
| exit | |
| fi | |
| # Print current version | |
| export PATH="${PATH}:/usr/local/go/bin" | |
| # Check that go is installed | |
| if ! command -v go &> /dev/null | |
| then echo "Go could not be found" | |
| else | |
| CURRENT="$(go version | awk '{print $3}')" | |
| echo "Current version: ${CURRENT}" | |
| fi | |
| # Check latest version | |
| VERSION=$(curl -s https://go.dev/VERSION?m=text | head -n1) | |
| if [[ "${CURRENT}" == "${VERSION}" ]] | |
| then echo "Latest version ${VERSION} already installed" && exit | |
| else echo "New version is available: ${VERSION}" | |
| fi | |
| # Exit script if dry run is given | |
| if [[ "$1" == "--check" ]] | |
| then exit | |
| fi | |
| # Prompt user to continue | |
| read -r -p "Do you want to continue installing new version? [y/N] " response | |
| if [[ ! "${response}" =~ ^([yY][eE][sS]|[yY])$ ]] | |
| then exit | |
| fi | |
| FILENAME="${VERSION}.linux-amd64.tar.gz" | |
| URI="https://dl.google.com/go/${FILENAME}" | |
| DOWNLOAD_DIR="/tmp/" | |
| # Download latest version | |
| echo "Downloading and installing new version..." | |
| wget --quiet "${URI}" -P "${DOWNLOAD_DIR}" | |
| # Remove current installation | |
| rm -rf /usr/local/go | |
| # Extract downloaded version | |
| tar -C /usr/local -xzf "${DOWNLOAD_DIR}${FILENAME}" | |
| # Delete latest version | |
| rm "${DOWNLOAD_DIR}${FILENAME}" | |
| # Print new version | |
| echo "New version installed: $(go version)" |
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