add: curl install script for Windows

install_curl.ps1

@@ -0,0 +1,84 @@
+# Copyright 2019 khanhas. GPL license.
+# Edited from project Denoland install script (https://github.com/denoland/deno_install)
+param (
+  [string] $version
+)
+
+$ErrorActionPreference = "Stop"
+
+# Helper functions for pretty terminal output.
+function Write-Part ([string] $Text) {
+  Write-Host $Text -NoNewline
+}
+
+function Write-Emphasized ([string] $Text) {
+  Write-Host $Text -NoNewLine -ForegroundColor "Cyan"
+}
+
+function Write-Done {
+  Write-Host " > " -NoNewline
+  Write-Host "OK" -ForegroundColor "Green"
+}
+
+if (-not $version) {
+  # Determine latest Spicetify release via GitHub API.
+  $latest_release_uri =
+    "https://api.github.com/repos/khanhas/spicetify-cli/releases/latest"
+  Write-Part "DOWNLOADING    "; Write-Emphasized $latest_release_uri
+  $latest_release_json = curl --tlsv1.2 $latest_release_uri
+  Write-Done
+
+  $version = ($latest_release_json | ConvertFrom-Json).tag_name -replace "v", ""
+}
+
+# Create ~\spicetify-cli directory if it doesn't already exist
+$sp_dir = "${HOME}\spicetify-cli"
+if (-not (Test-Path $sp_dir)) {
+  Write-Part "MAKING FOLDER  "; Write-Emphasized $sp_dir
+  New-Item -Path $sp_dir -ItemType Directory | Out-Null
+  Write-Done
+}
+
+# Download release.
+$zip_file = "${sp_dir}\spicetify-${version}-windows-x64.zip"
+$download_uri = "https://github.com/khanhas/spicetify-cli/releases/download/" +
+                "v${version}/spicetify-${version}-windows-x64.zip"
+Write-Part "DOWNLOADING    "; Write-Emphasized $download_uri
+curl --tlsv1.2 $download_uri -o $zip_file
+Write-Done
+
+# Extract spicetify.exe and assets from .zip file.
+Write-Part "EXTRACTING     "; Write-Emphasized $zip_file
+Write-Part " into "; Write-Emphasized ${sp_dir};
+# Using -Force to overwrite spicetify.exe and assets if it already exists
+Expand-Archive -Path $zip_file -DestinationPath $sp_dir -Force
+Write-Done
+
+# Remove .zip file.
+Write-Part "REMOVING       "; Write-Emphasized $zip_file
+Remove-Item -Path $zip_file
+Write-Done
+
+# Get Path environment variable for the current user.
+$user = [EnvironmentVariableTarget]::User
+$path = [Environment]::GetEnvironmentVariable("PATH", $user)
+
+# Check whether spicetify dir is in the Path.
+$paths = $path -split ";"
+$is_in_path = $paths -contains $sp_dir -or $paths -contains "${sp_dir}\"
+
+# Add Spicetify dir to PATH if it hasn't been added already.
+if (-not $is_in_path) {
+  Write-Part "ADDING         "; Write-Emphasized $sp_dir; Write-Part " to the "
+  Write-Emphasized "PATH"; Write-Part " environment variable..."
+  [Environment]::SetEnvironmentVariable("PATH", "${path};${sp_dir}", $user)
+  # Add Spicetify to the PATH variable of the current terminal session
+  # so `spicetify` can be used immediately without restarting the terminal.
+  $env:PATH += ";${sp_dir}"
+  Write-Done
+}
+
+Write-Host ""
+Write-Done "spicetify-cli was installed successfully."
+Write-Part "Run "; Write-Emphasized "spicetify --help"; Write-Host " to get started."
+Write-Host ""