If your $GOROOT is in ~/goroot and your $GOPATH is in ~/go, you want to make sure that your new go version goes to the right folder.
By default the go tar file will unpack with go/ as a prefix directory, thus we want to remove that when unpacking, thus the --strip-components=1.
tar -C ~/goroot -xzvf go$VERSION.linux-amd64.tar.gz --strip-components=1#!/bin/bash
# set -e
set -o pipefail
FILE_DIR=$(mktemp -d -t upgover-XXXXXXXX)
echo "Entering into temporary work directory: ${FILE_DIR}"
cd "${FILE_DIR}" || exit
URL="https://golang.org"
VER_CHECK="${URL}/dl/"
DL_URL="https://dl.google.com/go/"
LATEST_FILE=$(curl -L -s "${VER_CHECK}" | grep filename | grep download | grep linux-amd64.tar.gz | head -n 1 | cut -d">" -f 3 | cut -d"<" -f 1)
echo "Latest file: ${LATEST_FILE}"
VER=$(echo "${LATEST_FILE}" | grep -oP 'go[0-9\.]+')
LATEST_VER=${VER%?}
CUR_VER=$(go version | cut -d" " -f3)
if [ "${LATEST_VER}" == "${CUR_VER}" ];
then
echo "You are already on the latest golang version: ${CUR_VER}"
exit 1
fi
FILE_URL="${DL_URL}${LATEST_FILE}"
CHECKSUM_URL="${FILE_URL}.sha256"
CHECKSUM_FILE="${LATEST_FILE}.sha256sum"
echo "Downloading: ${FILE_URL} at ${LATEST_FILE}"
curl -L -s -o "${LATEST_FILE}" "${FILE_URL}"
echo "Downloading checksum: ${CHECKSUM_URL} at ${CHECKSUM_FILE}"
CHECKSUM=$(curl -s "${CHECKSUM_URL}")
echo "${CHECKSUM}" "${LATEST_FILE}" > "${CHECKSUM_FILE}"
echo "Checking hashsum ....."
STATUS=$(sha256sum -c "${LATEST_FILE}.sha256sum" | grep OK)
if [ -n "${STATUS}" ];
then
echo "Hashsum is good!"
else
echo "HASHSUM IS NOT GOOD!"
exit 1
fi
echo "Installing....."
if [ -d "/home/${USER}/goroot" ];
then
echo "Removing goroot before upgrade"
rm -rf "/home/${USER}/goroot"
mkdir "/home/${USER}/goroot/"
echo "Installing in ~/goroot"
tar -C "/home/${USER}/goroot" -xzf "${LATEST_FILE}" --strip-components=1
else
echo "Removing goroot before upgrade"
rm -rf "/usr/local/go"
echo "Installing /usr/local/"
tar -C "/usr/local/" -xzf "${LATEST_FILE}"
fi
echo "Cleaning up temp directory at: ${FILE_DIR}"
rm -rf "${FILE_DIR}"