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dotfiles/local/bin/x-gh-get-latest-release-targz

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#!/usr/bin/env bash
#
# Fetch the latest release version of a GitHub repository in tar.gz format (e.g. v1.0.0.tar.gz)
# Usage: x-gh-get-latest-release-targz <repo> [--get]
# Author: Ismo Vuorinen <https://github.com/ivuorinen> 2024
set -euo pipefail
# Enable verbosity with VERBOSE=1
VERBOSE="${VERBOSE:-0}"
# Function to print usage information
usage()
{
echo "Usage: $0 <github repo> [--get] (e.g. ivuorinen/dotfiles)"
echo " --get: Download and extract the tarball"
exit 1
}
# Function to print messages if VERBOSE is enabled
# $1 - message (string)
msg()
{
[[ "$VERBOSE" -eq 1 ]] && echo "$1"
return 0
}
# Function to fetch the tarball URL of the latest release from GitHub
# $1 - GitHub repository (string)
get_latest_tarball_url()
{
local repo=$1
local tarball_url
tarball_url=$(curl -s "https://api.github.com/repos/${repo}/releases/latest" \
| sed -Ene '/^[[:blank:]]+"tarball_url":[[:blank:]]"(https:[^"]+)",/s//\1/p')
if [ -z "$tarball_url" ]; then
echo "(!) Failed to fetch the tarball URL for repository: $repo"
exit 1
fi
echo "$tarball_url"
return 0
}
# Function to download and extract the tarball
# $1 - tarball URL (string)
download_and_extract()
{
local url="$1"
msg "Downloading and extracting from: $url"
curl --location --silent "$url" | tar --extract --gzip --file=- || {
echo "(!) Failed to download or extract the tarball."
exit 1
}
return 0
}
# Main function
main()
{
if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
usage
fi
local repo=$1
local get_tarball=false
if [ "$#" -eq 2 ]; then
# Check if the first or second argument is --get
if [ "$1" == "--get" ] || [ "$2" == "--get" ]; then
get_tarball=true
else
usage
fi
fi
# Check if the first argument is --get
if [ "$1" == "--get" ]; then
repo="$2"
fi
msg "Fetching the tarball URL for the latest release of repository: $repo"
local location
location=$(get_latest_tarball_url "$repo")
if $get_tarball; then
download_and_extract "$location"
else
echo "$location"
fi
return 0
}
main "$@"
# vim: set ts=2 sw=2 ft=sh et: