init

internal/platform/darwin.go

@@ -0,0 +1,65 @@
+package platform
+
+import (
+	"context"
+	"os"
+	"os/exec"
+)
+
+// DarwinPlatform macOS 平台实现
+type DarwinPlatform struct {
+	homeDir string
+}
+
+// NewDarwinPlatform 创建 macOS 平台实例
+func NewDarwinPlatform() *DarwinPlatform {
+	home, _ := os.UserHomeDir()
+	return &DarwinPlatform{homeDir: home}
+}
+
+func (p *DarwinPlatform) OS() string      { return "darwin" }
+func (p *DarwinPlatform) Arch() string    { return "amd64" } // TODO: detect properly
+func (p *DarwinPlatform) HomeDir() string { return p.homeDir }
+
+func (p *DarwinPlatform) ConfigDir() string {
+	return p.homeDir + "/Library/Application Support"
+}
+
+func (p *DarwinPlatform) DataDir() string {
+	return p.homeDir + "/Library/Application Support"
+}
+
+func (p *DarwinPlatform) GetEnvVar(key string) string {
+	return os.Getenv(key)
+}
+
+func (p *DarwinPlatform) SetEnvVar(ctx context.Context, key, value string) error {
+	// On macOS, set via launchctl and shell profile
+	cmd := exec.CommandContext(ctx, "launchctl", "setenv", key, value)
+	return cmd.Run()
+}
+
+func (p *DarwinPlatform) AddToPath(ctx context.Context, dir string) error {
+	// TODO: Add to shell profile
+	return nil
+}
+
+func (p *DarwinPlatform) IsAdmin() bool {
+	return os.Geteuid() == 0
+}
+
+func (p *DarwinPlatform) PackageManagers() []string {
+	var pms []string
+	if _, err := exec.LookPath("brew"); err == nil {
+		pms = append(pms, "homebrew")
+	}
+	return pms
+}
+
+func (p *DarwinPlatform) DefaultShell() string {
+	shell := os.Getenv("SHELL")
+	if shell != "" {
+		return shell
+	}
+	return "/bin/zsh"
+}

internal/platform/linux.go

@@ -0,0 +1,82 @@
+package platform
+
+import (
+	"context"
+	"os"
+	"os/exec"
+)
+
+// LinuxPlatform Linux 平台实现
+type LinuxPlatform struct {
+	homeDir string
+}
+
+// NewLinuxPlatform 创建 Linux 平台实例
+func NewLinuxPlatform() *LinuxPlatform {
+	home, _ := os.UserHomeDir()
+	return &LinuxPlatform{homeDir: home}
+}
+
+func (p *LinuxPlatform) OS() string      { return "linux" }
+func (p *LinuxPlatform) Arch() string    { return "amd64" } // TODO: detect properly
+func (p *LinuxPlatform) HomeDir() string { return p.homeDir }
+
+func (p *LinuxPlatform) ConfigDir() string {
+	if dir := os.Getenv("XDG_CONFIG_HOME"); dir != "" {
+		return dir
+	}
+	return p.homeDir + "/.config"
+}
+
+func (p *LinuxPlatform) DataDir() string {
+	if dir := os.Getenv("XDG_DATA_HOME"); dir != "" {
+		return dir
+	}
+	return p.homeDir + "/.local/share"
+}
+
+func (p *LinuxPlatform) GetEnvVar(key string) string {
+	return os.Getenv(key)
+}
+
+func (p *LinuxPlatform) SetEnvVar(ctx context.Context, key, value string) error {
+	// TODO: Add to shell profile
+	return os.Setenv(key, value)
+}
+
+func (p *LinuxPlatform) AddToPath(ctx context.Context, dir string) error {
+	// TODO: Add to shell profile
+	return nil
+}
+
+func (p *LinuxPlatform) IsAdmin() bool {
+	return os.Geteuid() == 0
+}
+
+func (p *LinuxPlatform) PackageManagers() []string {
+	var pms []string
+	if _, err := exec.LookPath("apt"); err == nil {
+		pms = append(pms, "apt")
+	}
+	if _, err := exec.LookPath("dnf"); err == nil {
+		pms = append(pms, "dnf")
+	}
+	if _, err := exec.LookPath("yum"); err == nil {
+		pms = append(pms, "yum")
+	}
+	if _, err := exec.LookPath("pacman"); err == nil {
+		pms = append(pms, "pacman")
+	}
+	if _, err := exec.LookPath("snap"); err == nil {
+		pms = append(pms, "snap")
+	}
+	return pms
+}
+
+func (p *LinuxPlatform) DefaultShell() string {
+	shell := os.Getenv("SHELL")
+	if shell != "" {
+		return shell
+	}
+	return "/bin/bash"
+}

internal/platform/platform.go

@@ -0,0 +1,57 @@
+package platform
+
+import (
+	"context"
+	"runtime"
+)
+
+// Platform 平台适配接口
+type Platform interface {
+	// OS 返回操作系统标识
+	OS() string
+
+	// Arch 返回架构标识
+	Arch() string
+
+	// HomeDir 返回用户主目录
+	HomeDir() string
+
+	// ConfigDir 返回配置文件目录
+	ConfigDir() string
+
+	// DataDir 返回数据目录
+	DataDir() string
+
+	// GetEnvVar 获取环境变量
+	GetEnvVar(key string) string
+
+	// SetEnvVar 设置用户级环境变量
+	SetEnvVar(ctx context.Context, key, value string) error
+
+	// AddToPath 添加目录到 PATH
+	AddToPath(ctx context.Context, dir string) error
+
+	// IsAdmin 是否以管理员身份运行
+	IsAdmin() bool
+
+	// PackageManagers 返回可用的包管理器名称
+	PackageManagers() []string
+
+	// DefaultShell 返回默认 Shell
+	DefaultShell() string
+}
+
+// Detect 检测当前平台并返回对应的 Platform 实现
+func Detect() Platform {
+	switch runtime.GOOS {
+	case "windows":
+		return NewWindowsPlatform()
+	case "darwin":
+		return NewDarwinPlatform()
+	case "linux":
+		return NewLinuxPlatform()
+	default:
+		// Fallback to Linux
+		return NewLinuxPlatform()
+	}
+}

internal/platform/windows.go

@@ -0,0 +1,83 @@
+package platform
+
+import (
+	"context"
+	"os"
+	"os/exec"
+)
+
+// WindowsPlatform Windows 平台实现
+type WindowsPlatform struct {
+	homeDir string
+}
+
+// NewWindowsPlatform 创建 Windows 平台实例
+func NewWindowsPlatform() *WindowsPlatform {
+	return &WindowsPlatform{
+		homeDir: os.Getenv("USERPROFILE"),
+	}
+}
+
+func (p *WindowsPlatform) OS() string   { return "windows" }
+func (p *WindowsPlatform) Arch() string { return os.Getenv("PROCESSOR_ARCHITECTURE") }
+
+func (p *WindowsPlatform) HomeDir() string {
+	return p.homeDir
+}
+
+func (p *WindowsPlatform) ConfigDir() string {
+	if dir := os.Getenv("APPDATA"); dir != "" {
+		return dir
+	}
+	return p.homeDir + "\\AppData\\Roaming"
+}
+
+func (p *WindowsPlatform) DataDir() string {
+	if dir := os.Getenv("LOCALAPPDATA"); dir != "" {
+		return dir
+	}
+	return p.homeDir + "\\AppData\\Local"
+}
+
+func (p *WindowsPlatform) GetEnvVar(key string) string {
+	return os.Getenv(key)
+}
+
+func (p *WindowsPlatform) SetEnvVar(ctx context.Context, key, value string) error {
+	cmd := exec.CommandContext(ctx, "setx", key, value)
+	return cmd.Run()
+}
+
+func (p *WindowsPlatform) AddToPath(ctx context.Context, dir string) error {
+	currentPath := os.Getenv("PATH")
+	newPath := dir + ";" + currentPath
+	return p.SetEnvVar(ctx, "PATH", newPath)
+}
+
+func (p *WindowsPlatform) IsAdmin() bool {
+	// Check if running as administrator on Windows
+	cmd := exec.Command("net", "session")
+	err := cmd.Run()
+	return err == nil
+}
+
+func (p *WindowsPlatform) PackageManagers() []string {
+	var pms []string
+	if _, err := exec.LookPath("scoop"); err == nil {
+		pms = append(pms, "scoop")
+	}
+	if _, err := exec.LookPath("choco"); err == nil {
+		pms = append(pms, "chocolatey")
+	}
+	if _, err := exec.LookPath("winget"); err == nil {
+		pms = append(pms, "winget")
+	}
+	return pms
+}
+
+func (p *WindowsPlatform) DefaultShell() string {
+	if _, err := exec.LookPath("pwsh"); err == nil {
+		return "pwsh" // PowerShell 7+
+	}
+	return "powershell" // Windows PowerShell 5.1
+}