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andwati.com/scripts/update-zola
T
2023-08-08 15:58:07 +03:00

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#!/usr/bin/env sh
set -e
: ${ZOLA_REPO='https://github.com/getzola/zola'}
: ${ZOLA_INSTALL_DIR="${HOME}/.cargo/bin"}
# Helpers for ANSI color and logging.
name="$(basename $0)"; esc=''; reset="${esc}[0m"
red() { local string="${1}"; echo "${esc}[31m${string}${reset}"; }
yellow() { local string="${1}"; echo "${esc}[33m${string}${reset}"; }
green() { local string="${1}"; echo "${esc}[32m${string}${reset}"; }
blue() { local string="${1}"; echo "${esc}[34m${string}${reset}"; }
magenta() { local string="${1}"; echo "${esc}[35m${string}${reset}"; }
log() { local string="${1}"; echo "[$(blue $name)] ${string}"; }
prompt_for_update() {
local current="${1}"
local latest="${2}"
[ -n "${current}" ] \
&& installed="You're using Zola $(yellow $current)" \
|| installed="Zola is $(red 'not installed')"
log "${installed}, but $(magenta $latest) is available."
# Prompt for an update. Exit the entire script if declined.
read -p "$(log "Would you like to install Zola $(magenta $latest)? [y/N]: ")" answer
case $answer in
[Yy]*) log "Downloading Zola $(magenta $latest) from GitHub." ;;
[Nn]*|*) log $(red "Aborted!"); exit ;;
esac
}
install_zola() {
local version="${1}"
local download_url="${ZOLA_REPO}/releases/download/${version}/zola-${version}-x86_64-unknown-linux-gnu.tar.gz"
curl --progress-bar --location $download_url | tar --gunzip --extract --directory=$ZOLA_INSTALL_DIR --file -
}
update_zola() {
# Find the current Zola version (if any).
[ -n "$(which zola 2> /dev/null)" ] && current_version=$(zola --version | awk '{print "v"$2}')
# Find the latest available Zola version. Use --refs to avoid listing
# annotated commit objects that include the dereference syntax '^{}'.
# Find more background at https://stackoverflow.com/a/15472310.
local latest_version=$(git ls-remote --tags --refs $ZOLA_REPO | # Fetch remote tags.
sort -t '/' -k 3 -V | # Sort them by version.
tail -n 1 | # Take the latest one.
awk -F / '{print $3}') # Return only the tag.
if [ "${current_version}" != "${latest_version}" ]; then
prompt_for_update "${current_version}" "${latest_version}"
install_zola "${latest_version}"
fi
log "You're using Zola $(magenta $latest_version). $(green "Everything is up-to-date!")"
}
update_zola