feat(scripts): add install script for Windows platforms (#43)

* feat(scripts): add Powershell install script

* chore(repo): add Windows installation README instructions

README.md

@@ -4,3 +4,18 @@ Licensa is a powerful CLI tool designed for seamless source code license managem
 
 As of today, Licensa boasts compatibility with over **65 file types**, making it a versatile and comprehensive solution for license management in diverse coding environments.
 
+## Installation
+
+### Windows
+
+Before running the installation script, ensure that your PowerShell execution policy allows (remote) script execution. You can set the execution policy using the following command:
+
+```powershell
+Set-ExecutionPolicy RemoteSigned -Scope CurrentUser
+```
+
+Executing the following script will walk you through the installation process (you may need to run this command from an elevated shell):
+
+```powershell
+Invoke-Expression -Command (Invoke-WebRequest -Uri "https://raw.githubusercontent.com/ekkolon/licensa/main/scripts/install.ps1" -UseBasicParsing).Content
+```

scripts/install.ps1

@@ -0,0 +1,98 @@
+
+# Logging helper
+function Write-Log {
+    param(
+        [string]$Level,
+        [string]$Message
+    )
+
+    switch ($Level) {
+        "info" { $ForegroundColor = "Blue" }
+        "success" { $ForegroundColor = "Green" }
+        "warn" { $ForegroundColor = "Yellow" }
+        "error" { $ForegroundColor = "Red" }
+        default { $ForegroundColor = "White" }
+    }
+
+    $TimeStamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
+    $FormattedLevel = "[$($Level.ToUpper())]"
+    $FormattedMessage = "$TimeStamp $FormattedLevel $Message"
+
+    Write-Host $FormattedMessage -ForegroundColor $ForegroundColor
+}
+
+# GitHub repository details
+$version = "0.1.0"
+$binName = "licensa"
+$releaseTag = "v${version}"
+
+$assetNameUnpacked = "${binName}-${releaseTag}-x86_64-windows"
+$assetNameZip = "${assetNameUnpacked}.zip"
+
+$releaseDownloadUrl = "https://github.com/ekkolon/licensa/releases/download/$releaseTag/$assetNameZip"
+
+# Target download directory
+$userDownloadsFolder = Join-Path $env:USERPROFILE "Downloads"
+$downloadPath = Join-Path $userDownloadsFolder $assetNameZip
+# TODO: handle errors for `downloadPath`
+
+# Prompt the user for confirmation
+$confirmation = Read-Host "This script is set to download and install Licensa CLI ${releaseTag}.
+Are you sure you want to proceed? (Type 'Y' for Yes, 'N' for No)"
+
+if ($confirmation -ne 'Y' -or $confirmation -ne 'y') {
+    Write-Log -Level "info" -Message "The installation process has been canceled"
+    Exit
+}
+
+# Download binary from GitHub release
+Write-Log -Level "info" -Message "Downloading assets from GitHub ..."
+Invoke-WebRequest -Uri $releaseDownloadUrl -OutFile $downloadPath
+Write-Log -Level "success" -Message "Download succeded!"
+
+# Unpack the binary
+Write-Log -Level "info" -Message "Unpacking..."
+Expand-Archive -Path $downloadPath -DestinationPath $userDownloadsFolder -Force
+Write-Log -Level "success" -Message "Successfully unpacked ${assetNameZip}"
+
+Write-Log -Level "info" -Message "Installing..."
+$programFiles = $env:Programfiles
+$destinationPath = Join-Path $programFiles "Licensa"
+
+# Check if the program folder exists
+if (-not (Test-Path -Path $destinationPath -PathType Container)) {
+    # Create the program folder if it doesn't exist
+    New-Item -ItemType Directory -Path $destinationPath | Out-Null
+    Write-Log -Level "info" -Message "Licensa CLI directory created at: $destinationPath"
+}
+else {
+    # TODO: improve error handling
+    # TODO: Suggest override
+    Write-Host "Licensa CLI is already installed at: $destinationPath"
+    Exit
+}
+
+$sourceFolder = Join-Path $downloadsFolder $assetNameUnpacked
+
+# Move unpacked source to destination
+Get-ChildItem -Path $sourceFolder | Move-Item -Destination $destinationPath
+
+# Remove downloaded zip and unpacked directory
+Remove-Item -Path $sourceFolder
+Remove-Item -Path $downloadPath
+
+# Confirm adding Licensa CLI to system variables
+$confirmation = Read-Host "Would you like to add the Licensa CLI to your system variables? [y/N]"
+if ($confirmation -eq 'Y' -or $confirmation -eq 'y') {    
+    # Add directory path to system environment variable
+    $envPath = [System.Environment]::GetEnvironmentVariable('Path', [System.EnvironmentVariableTarget]::User)
+    $newPath = $envPath + ";" + $destinationPath
+    [System.Environment]::SetEnvironmentVariable('Path', $newPath, [System.EnvironmentVariableTarget]::User)
+    Write-Log -Level "info" -Message "Added Licensa CLI to system variables"
+}
+
+Write-Log -Level "success" -Message "Licensa CLI has been installed successfully"
+
+exit
+
+