install.sh

#!/bin/sh

set -e

# eg. release-lab/whatchanged
target="MapoMagpie/rimedm"
owner="MapoMagpie"
repo="rimedm"
exe_name="rimedm"
githubUrl=""
githubApiUrl=""
version=""

get_arch() {
	# darwin/amd64: Darwin axetroydeMacBook-Air.local 20.5.0 Darwin Kernel Version 20.5.0: Sat May  8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64 x86_64
	# linux/amd64: Linux test-ubuntu1804 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
	a=$(uname -m)
	case ${a} in
	"x86_64" | "amd64")
		echo "x86_64"
		;;
	"i386" | "i486" | "i586")
		echo "i386"
		;;
	"aarch64" | "arm64" | "arm")
		echo "arm64"
		;;
	"mips64el")
		echo "mips64el"
		;;
	"mips64")
		echo "mips64"
		;;
	"mips")
		echo "mips"
		;;
	*)
		echo ${NIL}
		;;
	esac
}

get_os() {
	# darwin: Darwin
	echo $(uname -s)
}

# parse flag
for i in "$@"; do
	case $i in
	-v=* | --version=*)
		version="${i#*=}"
		shift # past argument=value
		;;
	-g=* | --github=*)
		githubUrl="${i#*=}"
		shift # past argument=value
		;;
	*)
		# unknown option
		;;
	esac
done

if [ -z "$githubUrl" ]; then
	githubUrl="https://github.com"
fi
if [ -z "$githubApiUrl" ]; then
	githubApiUrl="https://api.github.com"
fi

downloadFolder="${TMPDIR:-/tmp}"
mkdir -p ${downloadFolder} # make sure download folder exists
os=$(get_os)
arch=$(get_arch)
file_name="${exe_name}_${os}_${arch}.tar.gz"     # the file name should be download
downloaded_file="${downloadFolder}/${file_name}" # the file path should be download

executable_folder="/usr/local/bin" # Eventually, the executable file will be placed here
if [ ! -w "${executable_folder}" ]; then
	executable_folder="${HOME}/.local/bin"
	# check if the directory exists
	if [ ! -d "${executable_folder}" ]; then
		mkdir -p ${executable_folder}
	fi
fi

# if version is empty
if [ -z "$version" ]; then
	asset_path=$(
		command curl -L \
			-H "Accept: application/vnd.github+json" \
			-H "X-GitHub-Api-Version: 2022-11-28" \
			${githubApiUrl}/repos/${owner}/${repo}/releases |
			command grep -o "/${owner}/${repo}/releases/download/.*/${file_name}" |
			command head -n 1
	)
	if [[ ! "$asset_path" ]]; then
		echo "ERROR: unable to find a release asset called ${file_name}"
		exit 1
	fi
	asset_uri="${githubUrl}${asset_path}"
else
	asset_uri="${githubUrl}/${owner}/${repo}/releases/download/${version}/${file_name}"
fi

echo "[1/3] Download ${asset_uri} to ${downloadFolder}"
rm -f ${downloaded_file}
curl --fail --location --output "${downloaded_file}" "${asset_uri}"

echo "[2/3] Install ${exe_name} to the ${executable_folder}"
tar -xz -f ${downloaded_file} -C ${executable_folder}
exe=${executable_folder}/${exe_name}
chmod +x ${exe}

echo "[3/3] Set environment variables"
echo "${exe_name} was installed successfully to ${exe}"
if command -v $exe_name --version >/dev/null; then
	echo "Run '$exe_name -h' to get started"
else
	echo "Manually add the directory to your \$HOME/.bash_profile (or similar)"
	echo "  export PATH=${executable_folder}:\$PATH"
	echo "Run '$exe_name -h' to get started"
fi

exit 0