전체 설치 스크립트 GitHub 릴리스 에셋 검증 및 폴백 다운로드 방어 로직 적용

install-dua.ps1

@@ -127,7 +127,7 @@ function Get-DownloadUrl {
 # Download, extract & install
 # ────────────────────────────────────────────
 function Install-Dua {
-    param([string]$Url)
+    param([string]$Url, [string]$FallbackUrl)
 
     $tmpDir = Join-Path $env:TEMP "dua_install_$(Get-Random)"
     New-Item -ItemType Directory -Path $tmpDir -Force | Out-Null
@@ -141,7 +141,18 @@ function Install-Dua {
             Invoke-WebRequest -Uri $Url -OutFile $zipPath -UseBasicParsing
             $ProgressPreference = 'Continue'
         } catch {
-            ErrExit "Download failed from $Url : $_"
+            if ($FallbackUrl -and ($FallbackUrl -ne $Url)) {
+                Warn "Primary download failed. Retrying with fallback URL: $FallbackUrl"
+                try {
+                    $ProgressPreference = 'SilentlyContinue'
+                    Invoke-WebRequest -Uri $FallbackUrl -OutFile $zipPath -UseBasicParsing
+                    $ProgressPreference = 'Continue'
+                } catch {
+                    ErrExit "Download failed from $FallbackUrl : $_"
+                }
+            } else {
+                ErrExit "Download failed from $Url : $_"
+            }
         }
 
         Info "Extracting archive..."
@@ -218,7 +229,8 @@ function Main {
     Info "Release tag: $tag"
 
     $url = Get-DownloadUrl -Tag $tag -Triple $triple
-    $duaBin = Install-Dua -Url $url
+    $fallbackUrl = Get-DownloadUrl -Tag $FALLBACK_TAG -Triple $triple
+    $duaBin = Install-Dua -Url $url -FallbackUrl $fallbackUrl
 
     if ($AddToPath) {
         Add-ToUserPath -Dir $InstallDir