Add install.ps1 for Windows

sh/install.ps1

@@ -0,0 +1,151 @@
+# Hii ni skripti ya kusanikisha programu ya Nuru
+# Hii skripti ni ya "Operating System" ya "Windows" pekee
+# Skripti hii imejaribiwa kwenye toleo la Kumi na kuendelea ya "Windows"
+
+param (
+    [Parameter(HelpMessage="The version to be downloaded from GitHub (default: latest)")]
+    [ValidateNotNullOrEmpty()]
+    [string]$Version = "latest",
+
+    [Parameter(HelpMessage="The base path to be used when installing (default: C:\Program Files\nuru)")]
+    [ValidateNotNullOrEmpty()]
+    [string]$Prefix = "C:\Program Files\nuru",
+
+    [Parameter(HelpMessage="Show this help message")]
+    [switch]$Help
+)
+
+$RELEASE_URL = "https://github.com/NuruProgramming/Nuru/releases"
+$LATEST_URL = 'https://api.github.com/repos/NuruProgramming/Nuru/releases/latest'
+
+function Get-Help {
+    $HelpMessage = @"
+Usage install.ps1 [Options]
+
+Options:
+    -Version The version to be downloaded from GitHub (default: latest)
+    -Prefix  The base path to be used when installing (default: C:\Program Files\nuru)
+    -Help    Show this help message
+"@
+
+    Write-Host $HelpMessage
+}
+
+function Get-Arch {
+    $ARCH = [System.Runtime.InteropServices.RuntimeInformation, mscorlib]::OSArchitecture.ToString().ToLower()
+    Write-Verbose "Detected system architecture: $ARCH"
+
+    switch ($ARCH) {
+        "x86" { return "i386" }
+        "x64" { return "amd64" }
+        "arm64" { return "arm64" }
+        Default {
+            Write-Error "Unsupported architecture: $ARCH"
+            exit 1
+        }
+    }
+}
+
+function Download-File {
+    param (
+        [Parameter(Mandatory=$true, HelpMessage="The URL from where the file is to be downloaded.")]
+        [ValidateNotNullOrEmpty()]
+        [string]$URL,
+
+        [Parameter(HelpMessage="Specify the local path to save the file")]
+        [string]$Save,
+
+        [Parameter(HelpMessage="Specify if the content is RESTful or not")]
+        [switch]$IsReq
+    )
+
+    Write-Verbose "Downloading file from '$URL'"
+
+    # Ensure TLS 1.2 for secure communication
+    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+
+    try {
+        if ($IsReq) {
+            if ($Save) {
+                Invoke-WebRequest -Uri $URL -OutFile $Save
+                return $Save
+            } else {
+                return Invoke-WebRequest -Uri $URL
+            }
+        } else {
+            return Invoke-RestMethod -Uri $URL
+        }
+    } catch {
+        Write-Host "Error while downloading: $_"
+        exit 2
+    }
+}
+
+function Main {
+    if ($Help) {
+        Get-Help
+        exit 0
+    }
+
+    $ARCH = Get-Arch
+
+    $Version = $Version.Trim()
+
+    if ($Version -eq "latest") {
+        Write-Verbose "Fetching latest version tag from GitHub..."
+        $latestRelease = Download-File -URL $LATEST_URL
+        $Version = $latestRelease.tag_name
+        Write-Host "Latest version: $Version"
+    }
+
+    if (-not $Version) {
+        Write-Host "Error: Version cannot be null or empty."
+        exit 2
+    }
+
+    # Ensure the installation path exists
+    if (!(Test-Path -Path $Prefix)) {
+        Write-Verbose "Creating directory at: $Prefix"
+        try {
+            New-Item -ItemType Directory -Path $Prefix -Force
+        } catch {
+            Write-Host "Error creating directory: $_"
+            exit 2
+        }
+    }
+
+    $RFileName = "nuru_Windows_$ARCH"
+    $TempDir = "$env:TEMP\$RFileName"
+    $ZIP_FileName = "$TempDir.zip"
+    $ZIP_URL = "$RELEASE_URL/download/$Version/$RFileName.zip"
+
+    # Download the zip file containing the release
+    $ZIP_FILE = Download-File -IsReq -URL $ZIP_URL -Save $ZIP_FileName
+
+    Write-Verbose "Extracting $ZIP_FILE to $TempDir"
+    try {
+        Expand-Archive -Path $ZIP_FILE -DestinationPath $TempDir
+    } catch {
+        Write-Host "Error while extracting the archive: $_"
+        exit 2
+    }
+
+    # Clean up the downloaded zip file
+    Remove-Item -Path $ZIP_FILE -Force
+
+    # Copy the executable to the desired installation path
+    Write-Verbose "Copying nuru.exe to $Prefix"
+    try {
+        Copy-Item -Path "$TempDir/nuru.exe" -Destination "$Prefix/nuru.exe" -Force
+    } catch {
+        Write-Host "Error while copying the executable: $_"
+        exit 2
+    } finally {
+        # Cleanup temporary files after installation
+        Remove-Item -Path $TempDir -Recurse -Force
+    }
+
+    Write-Host "Installation completed successfully."
+}
+
+Main