git 이 없으면 설치하는 부분 추가

install-lazygit.ps1

@@ -48,6 +48,8 @@ $ErrorActionPreference = 'Stop'
 # ────────────────────────────────────────────
 $REPO    = "jesseduffield/lazygit"
 $API_URL = "https://api.github.com/repos/$REPO/releases"
+$GIT_REPO = "git-for-windows/git"
+$GIT_API_URL = "https://api.github.com/repos/$GIT_REPO/releases"
 
 # ────────────────────────────────────────────
 # Utility functions
@@ -62,6 +64,156 @@ function Write-Err     { param([string]$msg) Write-Host "[ERROR] $msg" -Foregrou
 # ────────────────────────────────────────────
 [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
 
+# ────────────────────────────────────────────
+# Check for git (required by lazygit)
+# ────────────────────────────────────────────
+function Install-GitPortable {
+    Write-Info "git is not installed. Installing PortableGit..."
+
+    # Detect architecture
+    $envArch = $env:PROCESSOR_ARCHITEW6432
+    if (-not $envArch) { $envArch = $env:PROCESSOR_ARCHITECTURE }
+
+    $gitArch = ""
+    if ($envArch -eq "AMD64") {
+        $gitArch = "64-bit"
+    } elseif ($envArch -eq "ARM64") {
+        $gitArch = "arm64"
+    } else {
+        Write-Err "Unsupported architecture for PortableGit: $envArch"
+    }
+
+    # Find latest Git for Windows release
+    Write-Info "Fetching latest Git for Windows release..."
+    try {
+        $releases = Invoke-RestMethod -Uri $GIT_API_URL -UseBasicParsing `
+            -Headers @{ 'User-Agent' = 'install-lazygit-ps1' }
+    } catch {
+        Write-Err "Failed to call GitHub API for Git: $_"
+    }
+
+    $latestRelease = $releases | Where-Object { $_.prerelease -eq $false } | Select-Object -First 1
+    if (-not $latestRelease) {
+        Write-Err "Could not find latest Git for Windows release."
+    }
+
+    $tagName = $latestRelease.tag_name
+    # Git for Windows tags look like "v2.54.0.windows.1"
+    $gitVersion = $tagName -replace '^v', '' -replace '\.windows\.\d+$', ''
+    Write-Info "Latest Git for Windows: $tagName (version $gitVersion)"
+
+    # Find the PortableGit asset for our architecture
+    $portablePattern = "PortableGit-${gitVersion}-${gitArch}.7z.exe"
+    $asset = $latestRelease.assets | Where-Object { $_.name -eq $portablePattern } | Select-Object -First 1
+
+    if (-not $asset) {
+        Write-Err "Could not find PortableGit asset matching '$portablePattern' in release $tagName."
+    }
+
+    $downloadUrl = $asset.browser_download_url
+    $installPath = Join-Path $env:USERPROFILE "PortableGit"
+
+    # Download
+    $tmpDir = Join-Path $env:TEMP "git_install_$(Get-Random)"
+    New-Item -ItemType Directory -Path $tmpDir -Force | Out-Null
+    $zipPath = Join-Path $tmpDir "$portablePattern"
+
+    try {
+        Write-Info "Downloading: $downloadUrl"
+        $ProgressPreference = 'SilentlyContinue'
+        Invoke-WebRequest -Uri $downloadUrl -OutFile $zipPath -UseBasicParsing
+        $ProgressPreference = 'Continue'
+
+        # PortableGit .7z.exe is a self-extracting archive
+        # Run it to extract to the install path
+        Write-Info "Extracting PortableGit to $installPath..."
+
+        # Try 7z first, then fall back to running the .7z.exe self-extractor
+        $extracted = $false
+        if (Get-Command 7z -ErrorAction SilentlyContinue) {
+            & 7z x $zipPath -o"$installPath" -y 2>&1 | Out-Null
+            $extracted = $true
+        } else {
+            # The .7z.exe is a self-extracting archive; run it with -y and -o"path"
+            # It needs to be run as an executable
+            try {
+                & $zipPath -y -o"$installPath" 2>&1 | Out-Null
+                $extracted = $true
+            } catch {
+                Write-Warn "Self-extractor failed, trying PowerShell expansion..."
+            }
+        }
+
+        if (-not $extracted) {
+            Write-Err "Cannot extract PortableGit. Install 7-Zip or install git manually from https://git-scm.com/download/win"
+        }
+
+    } finally {
+        if (Test-Path $tmpDir) {
+            Remove-Item -Path $tmpDir -Recurse -Force -ErrorAction SilentlyContinue
+        }
+    }
+
+    # Verify git.exe
+    $gitExe = Join-Path $installPath "cmd\git.exe"
+    if (-not (Test-Path $gitExe)) {
+        # Try bin directory as fallback
+        $gitExe = Join-Path $installPath "bin\git.exe"
+    }
+    if (-not (Test-Path $gitExe)) {
+        # Search recursively
+        $found = Get-ChildItem -Path $installPath -Recurse -Filter "git.exe" -ErrorAction SilentlyContinue | Select-Object -First 1
+        if ($found) { $gitExe = $found.FullName }
+    }
+
+    if (-not (Test-Path $gitExe)) {
+        Write-Err "git.exe not found after extraction. Please install git manually."
+    }
+
+    # Add git's directory to PATH for this session and permanently
+    $gitDir = Split-Path $gitExe
+    if ($env:Path -notlike "*$gitDir*") {
+        $env:Path = "$gitDir;$env:Path"
+        Write-Info "Added $gitDir to PATH for this session"
+    }
+
+    $userPath = [System.Environment]::GetEnvironmentVariable('Path', 'User')
+    if ($userPath -notlike "*$gitDir*") {
+        [System.Environment]::SetEnvironmentVariable('Path', "$gitDir;$userPath", 'User')
+        Write-Success "Added $gitDir to user PATH permanently"
+    } else {
+        Write-Info "$gitDir already in user PATH"
+    }
+
+    # Also add the main bin dir for bash, ssh, etc.
+    $gitBinDir = Join-Path $installPath "bin"
+    if ((Test-Path $gitBinDir) -and ($env:Path -notlike "*$gitBinDir*")) {
+        $env:Path = "$gitBinDir;$env:Path"
+        $userPath = [System.Environment]::GetEnvironmentVariable('Path', 'User')
+        if ($userPath -notlike "*$gitBinDir*") {
+            [System.Environment]::SetEnvironmentVariable('Path', "$gitBinDir;$userPath", 'User')
+            Write-Success "Added $gitBinDir to user PATH permanently"
+        }
+    }
+
+    Write-Success "PortableGit installed to $installPath"
+}
+
+# Check if git is available
+$gitCmd = Get-Command git -ErrorAction SilentlyContinue
+if (-not $gitCmd) {
+    Install-GitPortable
+
+    # Refresh PATH and re-check
+    $env:Path = [System.Environment]::GetEnvironmentVariable('Path', 'User') + ';' + [System.Environment]::GetEnvironmentVariable('Path', 'Machine')
+    $gitCmd = Get-Command git -ErrorAction SilentlyContinue
+    if (-not $gitCmd) {
+        Write-Err "git installation failed. Please install git manually from https://git-scm.com/download/win and re-run this script."
+    }
+}
+
+Write-Success "git is available: $($gitCmd.Source)"
+
 # ────────────────────────────────────────────
 # Architecture detection
 # ────────────────────────────────────────────