install-sh/install-ttyd.ps1

#Requires -Version 5.1
<#
.SYNOPSIS
    GitHub Releases에서 최신 ttyd 안정 버전을 다운로드하고 Windows 환경에 설치합니다.

.DESCRIPTION
    https://github.com/tsl0922/ttyd/releases 에서 제공하는 최신 Windows 릴리스인
    ttyd.win32.exe 바이너리를 다운로드하여 지정된 디렉토리에 ttyd.exe로 설치하고
    사용자 PATH 환경 변수에 영구적으로 등록합니다.

.PARAMETER InstallDir
    ttyd.exe가 설치될 디렉토리 경로입니다. 기본값: $env:USERPROFILE\.local\bin

.PARAMETER AddToPath
    설치 디렉토리를 사용자 PATH 환경 변수에 영구적으로 추가할지 여부입니다. 기본값: $true

.EXAMPLE
    .\install-ttyd.ps1
    .\install-ttyd.ps1 -InstallDir "C:\tools\bin"
    .\install-ttyd.ps1 -AddToPath $false

    # Windows 원라인 원격 실행 명령어:
    powershell -ExecutionPolicy Bypass -c "[Net.ServicePointManager]::SecurityProtocol=[Net.SecurityProtocolType]::Tls12; $t=\"$env:TEMP\install-ttyd.ps1\"; iwr -useb 'https://gl.isitsoft.kr/publicproj/install-sh/-/raw/main/install-ttyd.ps1' -OutFile $t; & $t"

.NOTES
    실행 정책 에러가 발생하는 경우 다음 명령어로 해결할 수 있습니다:
      Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
#>

[CmdletBinding()]
param(
    [string] $InstallDir = "$env:USERPROFILE\.local\bin",
    [bool]   $AddToPath = $true
)

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

# HTTPS 다운로드를 위한 TLS 1.2 강제 (Windows 7/10 및 PowerShell 5.1 호환성 보장)
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

# ────────────────────────────────────────────
# 유틸리티 함수 정의
# ────────────────────────────────────────────
function Write-Info    { param([string]$msg) Write-Host "[INFO]  $msg" -ForegroundColor Cyan }
function Write-Warn    { param([string]$msg) Write-Host "[WARN]  $msg" -ForegroundColor Yellow }
function Write-Success { param([string]$msg) Write-Host "[OK]    $msg" -ForegroundColor Green }
function Write-Err     { param([string]$msg) Write-Host "[ERROR] $msg" -ForegroundColor Red; exit 1 }

# ────────────────────────────────────────────
# 상수 정의
# ────────────────────────────────────────────
$REPO = "tsl0922/ttyd"
$API_URL = "https://api.github.com/repos/$REPO/releases/latest"
$FALLBACK_TAG = "1.7.7"

# ────────────────────────────────────────────
# 메인 설치 프로세스
# ────────────────────────────────────────────

# 1) GitHub 최신 릴리스 정보 획득
Write-Info "Fetching latest ttyd release information from GitHub API..."
$release = $null
$tagName = $FALLBACK_TAG
try {
    $release = Invoke-RestMethod -Uri $API_URL -UseBasicParsing -Headers @{ 'User-Agent' = 'install-ttyd-ps1' } -TimeoutSec 15
    if ($release -and $release.tag_name -and $release.assets -and $release.assets.Count -gt 0) {
        $tagName = $release.tag_name
    }
} catch {
    Write-Warn "GitHub API call failed: $_. Using fallback tag: $FALLBACK_TAG"
}

Write-Info "Target ttyd version: $tagName"

# 2) ttyd.win32.exe 에셋 탐색
$assetName = "ttyd.win32.exe"
$asset = $null
if ($release -and $release.assets) {
    $asset = $release.assets | Where-Object { $_.name -eq $assetName } | Select-Object -First 1
}

if ($asset -and $asset.browser_download_url) {
    $downloadUrl = $asset.browser_download_url
} else {
    $downloadUrl = "https://github.com/$REPO/releases/download/$tagName/$assetName"
}
$fallbackUrl = "https://github.com/$REPO/releases/download/$FALLBACK_TAG/$assetName"
$destExeName = "ttyd.exe"

# 3) 다운로드 및 디렉토리 생성
if (-not (Test-Path $InstallDir)) {
    Write-Info "Creating installation directory: $InstallDir"
    New-Item -ItemType Directory -Path $InstallDir -Force | Out-Null
}

$destPath = Join-Path $InstallDir $destExeName
$tmpDir = Join-Path $env:TEMP "ttyd_install_$(Get-Random)"
New-Item -ItemType Directory -Path $tmpDir -Force | Out-Null
$tmpFilePath = Join-Path $tmpDir $assetName

try {
    Write-Info "Downloading binary: $downloadUrl"
    $ProgressPreference = 'SilentlyContinue'
    try {
        Invoke-WebRequest -Uri $downloadUrl -OutFile $tmpFilePath -UseBasicParsing
    } catch {
        if ($downloadUrl -ne $fallbackUrl) {
            Write-Warn "Primary download failed. Retrying with fallback version ($FALLBACK_TAG): $fallbackUrl"
            Invoke-WebRequest -Uri $fallbackUrl -OutFile $tmpFilePath -UseBasicParsing
        } else {
            throw
        }
    }
    $ProgressPreference = 'Continue'

    Write-Info "Deploying binary to install path: $destPath"
    Move-Item -Path $tmpFilePath -Destination $destPath -Force
} finally {
    if (Test-Path $tmpDir) {
        Remove-Item -Path $tmpDir -Recurse -Force -ErrorAction SilentlyContinue
    }
}

# 4) PATH 환경 변수 등록
if ($AddToPath) {
    if ($env:Path -notlike "*$InstallDir*") {
        $env:Path = "$InstallDir;$env:Path"
        Write-Info "Temporarily added $InstallDir to current session PATH."
    }

    $userPath = [System.Environment]::GetEnvironmentVariable('Path', 'User')
    if ($userPath -notlike "*$InstallDir*") {
        [System.Environment]::SetEnvironmentVariable('Path', "$InstallDir;$userPath", 'User')
        Write-Success "Permanently added $InstallDir to User PATH."
        Write-Warn "Please restart your terminal window to apply the updated PATH environment variable."
    } else {
        Write-Info "$InstallDir is already registered in User PATH."
    }
}

# 5) 설치 완료 검증
if (Test-Path $destPath) {
    Write-Host ""
    Write-Host "==================================================" -ForegroundColor Green
    Write-Success "ttyd ($tagName) installation completed successfully!"
    Write-Host "==================================================" -ForegroundColor Green
    Write-Info "Run command: ttyd --version"
} else {
    Write-Err "Installation seems to have failed. Please check if the binary exists at the destination path."
}