基於官網最新版自動爬蟲安裝最新版本

Install_Maven.ps1

# 檢查鏈接是否有效
function Test-URI {
    param (
        [Parameter(Position=0, Mandatory)]
        [string] $Uri
    )
    try {
        # 嘗試發送 HEAD 請求
        $response = Invoke-WebRequest -Uri $Uri -Method Head -TimeoutSec 10
        # 檢查 HTTP 狀態碼是否為 200
        if ($response -and $response.StatusCode -eq 200) {
            return $true
        } else {
            # Write-Warning "Received HTTP status code $($response.StatusCode). The link might not be valid."
            return $false
        }
    } catch {
        # Write-Warning "Error checking the link: $_"
        return $null
    }
} # Test-URI "https://dlcdn.apache.org/maven/maven-3/3.9.4/binaries/apache-maven-3.9.4-bin.zip"

# 下載檔案
function Get-RemoteFile {
    param (
        [Parameter(Position=0, Mandatory)]
        [string] $Uri,
        [Parameter(Position=1)]
        [string] $Destination = $env:TEMP,
        [Parameter()]
        [switch] $ShowDetail,
        [switch] $Force
    )
    # 檢查鏈接是否有效
    if (!(Test-URI $Uri)) {
        Write-Error "The provided link ($Uri) might not be valid." -ErrorAction Stop
    } else {
        # 從下載鏈接獲取原始檔名
        $filename = [System.IO.Path]::GetFileName((New-Object System.Uri($Uri)).AbsolutePath)
        
        # 組合檔名與目標目錄
        $downloadPath = Join-Path $Destination $filename
        
        # 提示信息
        if ($ShowDetail) {
            Write-Host "Downloading from: " -NoNewline
            Write-Host "$Uri" -ForegroundColor Green
            Write-Host "  Saving to: " -NoNewline
            Write-Host "$downloadPath" -ForegroundColor Green
        }
            
        # 使用 Start-BitsTransfer 下載檔案
        if ((Test-Path $downloadPath) -and !$Force) {
            Write-Host "*The file '$downloadPath' already exists at the destination. Use -Force to overwrite and download again." -ForegroundColor DarkGray
        } else {
            Start-BitsTransfer -Source $Uri -Destination $downloadPath -ErrorAction Stop
        }
        
        # 回傳下載的位置
        return $downloadPath
    }
} # Get-RemoteFile "https://dlcdn.apache.org/maven/maven-3/3.9.4/binaries/apache-maven-3.9.4-bin.zip"

# 新增環境變數
function Add-EnvPath {
    param (
        [Parameter(Position=0, Mandatory)]
        [string] $Path,
        [switch] $ShowDetail,
        [ValidateSet("Machine", "User", "Auto")]
        [string] $EnvironmentVariableTarget = "Machine"
    )
    # 初始化
    [IO.Directory]::SetCurrentDirectory(((Get-Location -PSProvider FileSystem).ProviderPath))
    $Path = [IO.Path]::GetFullPath($Path)
    $CheckPath = $false
    
    # 判斷管理權限
    if (([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
        $EnvironmentVariableTarget = "Machine"
    } else { $EnvironmentVariableTarget = "User" }
    
    # 檢查路徑是否有效
    if (-not (Test-Path $Path)) { Write-Error "The provided path is not valid." -ErrorAction Stop }
    
    # 獲取當前的 PATH
    $currentPath = [Environment]::GetEnvironmentVariable("PATH", $EnvironmentVariableTarget)

    # 創建一個正則表達式，用於檢查新路徑是否已經在 PATH 中
    $escapedPath = [regex]::Escape($Path)
    $pathExists = $currentPath -match "(^|;)$escapedPath(;|$)"

    if (-not $pathExists) {
        try { # 更新 PATH 環境變數
            $updatedPath = ($currentPath.TrimEnd(";") + ";$Path")
            [Environment]::SetEnvironmentVariable("PATH", $updatedPath, $EnvironmentVariableTarget)
            $env:Path = [Environment]::GetEnvironmentVariable("PATH", $EnvironmentVariableTarget)
            $CheckPath = ($env:Path -match "(^|;)$escapedPath(;|$)")
        } catch { Write-Error $_ -ErrorAction Stop }
    } else { $CheckPath = $true }
    
    # 顯是新增的內容
    if ($ShowDetail) {
        $highlightedPath = $currentPath.Replace($Path, "`e[32m$Path`e[0m")
        Write-Host "Updated PATH:: " -ForegroundColor Cyan -NoNewline
        Write-Host $highlightedPath
    }
    
    # 回傳結果
    return $CheckPath
} # Add-EnvPath "Z:\App\apache-maven-3.9.4\bin"



# 安裝 Maven
function Install-Maven {
    param (
        [Parameter(Position=0, Mandatory)]
        [string] $Path
    )
    
    # 請求 Maven 下載頁面
    $response = Invoke-WebRequest -Uri "https://maven.apache.org/download.cgi"
    # 使用正則表達式查找下載鏈接
    $downloadLink = ($response.Links -match "apache-maven-\d+\.\d+\.\d+-bin\.zip")[0].href
    # 下載檔案
    $downloadPath = Get-RemoteFile $downloadLink
    
    # 解壓縮檔案
    Expand-Archive -Path $downloadPath -DestinationPath $Path -Force
    # 取得解壓縮後的 Maven 目錄名稱
    $mavenDir = Join-Path $Path ($downloadPath -replace ".+\\apache-maven-(\d+\.\d+\.\d+)-bin\.zip$", 'apache-maven-$1')
    $mavenBin = Join-Path $mavenDir "bin"
    # 設置環境變數
    Add-EnvPath $mavenBin -EnvironmentVariableTarget Auto |Out-Null
    
    # 測試安裝
    $msg = $(mvn -v 2>&1) -join ''
    if ($msg -match 'JAVA_HOME') {
        Write-Warning $msg
        Write-Host "  To resolve this issue, please refer to the following link for installation instructions:"
        Write-Host "    https://www.oracle.com/java/technologies/downloads/#jdk20-windows" -ForegroundColor DarkGreen
    }
} # Install-Maven "C:\App"