install.sh

#!/usr/bin/env bash

set -euo pipefail

function usage() {
	echo "Usage: bash install.sh [ -d directory ] [ -v version ]"
	exit 2
}

INSTALL_DIR="${HOME}/bin"
VERSION=""
NAME=lingualeo
OS=$(uname -o | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m | tr '[:upper:]' '[:lower:]')
OS="${OS##*/}"

case "${ARCH}" in
x86_64) ARCH="amd64" ;;
arm) ARCH="arm64" ;;
esac

if which go &>/dev/null; then
	gobin=$(go env GOBIN)
	gopath="$(go env GOPATH)"
	gopathbin="${gopath}/bin"
	if [ -n "${gobin}" ] && [ -d "${gobin}" ]; then
		INSTALL_DIR="${gobin}"
	elif [ -n "${gopath}" ] && [ -d "${gopathbin}" ]; then
		INSTALL_DIR="${gopathbin}"
	fi
fi

while getopts hv:d: flag; do
	case "${flag}" in
	d) INSTALL_DIR=${OPTARG} ;;
	v) VERSION=${OPTARG} ;;
	h) usage ;;
	*) usage ;;
	esac
done

if [ ! -d "${INSTALL_DIR}" ]; then
	echo "Directory ${INSTALL_DIR} does not exist"
	exit 1
fi
if [ ! -w "${INSTALL_DIR}" ]; then
	echo "Directory ${INSTALL_DIR} is not writable"
	exit 1
fi
APP_PATH="${INSTALL_DIR}/${NAME}"

echo "Installing into ${APP_PATH}..."

if [ -z "${VERSION}" ]; then
    VERSION=$(
        curl -sSL --fail-with-body https://api.github.com/repos/trezorg/${NAME}/releases/latest | \
        awk -F ':' '/tag_name/ { gsub("[\", ]", "", $2); print $2 }'
    )
fi
DOWNLOAD_URL="https://github.com/trezorg/${NAME}/releases/download/${VERSION}/${NAME}-${OS}-${ARCH}"

if ! curl -sSL --fail-with-body "${DOWNLOAD_URL}" -o "${APP_PATH}"; then
	err=$?
	echo "Failed to download ${DOWNLOAD_URL} into ${APP_PATH}"
	exit ${err}
fi

chmod +x "${APP_PATH}"
"${NAME}" --help