add: Linux/MacOS install script

install.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+# Copyright 2019 khanhas. GPL license.
+# Edited from project Denoland install script (https://github.com/denoland/deno_install)
+
+set -e
+
+case $(uname -s) in
+Darwin) target="darwin" ;;
+*) target="linux" ;;
+esac
+
+if [ $(uname -m) != "x86_64" ]; then
+	echo "Unsupported architecture $(uname -m). Only x64 binaries are available."
+	exit
+fi
+
+if [ $# -eq 0 ]; then
+    latest_release_uri="https://api.github.com/repos/khanhas/spicetify-cli/releases/latest"
+    echo "DOWNLOADING    $latest_release_uri"
+	spicetify_asset_path=$(
+		command curl -sSf "$latest_release_uri" |
+			command grep -o "/khanhas/spicetify-cli/releases/download/.*/spicetify-.*-${target}-amd64\\.tar\\.gz" |
+			command head -n 1
+	)
+	if [ ! "$spicetify_asset_path" ]; then exit 1; fi
+	download_uri="https://github.com${spicetify_asset_path}"
+else
+	download_uri="https://github.com/khanhas/spicetify-cli/releases/download/v${1}/spicetify-${1}-${target}-amd64\\.tar\\.gz"
+fi
+
+spicetify_install="${SPICETIFY_INSTALL:-$HOME/spicetify-cli}"
+exe="$spicetify_install/spicetify"
+
+if [ ! -d "$spicetify_install" ]; then
+    echo "MAKING FOLDER  $spicetify_install";
+	mkdir -p "$spicetify_install"
+fi
+
+tar_file="$exe.tar.gz"
+
+echo "DOWNLOADING    $download_uri"
+curl --fail --location --progress-bar --output "$tar_file" "$download_uri"
+cd "$spicetify_install"
+
+echo "EXTRACTING     $tar_file"
+tar xzf "$tar_file"
+
+chmod +x "$exe"
+
+echo "REMOVING       $tar_file"
+rm "$tar_file"
+
+echo ""
+echo "spicetify was installed successfully to $exe"
+echo ""
+if command -v spicetify >/dev/null; then
+	echo "Run 'spicetify --help' to get started"
+else
+	echo "Manually add the directory to your \$HOME/.bash_profile (or similar)"
+	echo "  export SPICETIFY_INSTALL=\"$spicetify_install\""
+	echo "  export PATH=\"\$SPICETIFY_INSTALL:\$PATH\""
+    echo ""
+	echo "Run '$exe --help' to get started"
+fi