chore: add retry logic to installer scripts

scripts/install.ps1

@@ -58,14 +58,49 @@ $ChecksumUrl = "$DownloadUrl.sha256"
 $TempDir = Join-Path ([System.IO.Path]::GetTempPath()) ([System.Guid]::NewGuid().ToString())
 New-Item -ItemType Directory -Force -Path $TempDir | Out-Null
 
+function Download-File {
+  param(
+    [string]$Uri,
+    [string]$OutFile,
+    [int]$MaxRetries = 3
+  )
+
+  $Attempt = 0
+  $DelaySeconds = 2
+
+  while ($Attempt -lt $MaxRetries) {
+    $Attempt++
+
+    try {
+      Invoke-WebRequest -Uri $Uri -OutFile $OutFile -Headers @{ "User-Agent" = "onx-installer" }
+
+      return
+    } catch {
+      $ErrorMessage = $_.Exception.Message
+
+      if ($Attempt -lt $MaxRetries) {
+        Write-Warning "Download attempt $Attempt failed ($ErrorMessage). Retrying in ${DelaySeconds}s..."
+
+        Start-Sleep -Seconds $DelaySeconds
+
+        $DelaySeconds = $DelaySeconds * 2
+      } else {
+        Write-Error "Failed to download $Uri after $MaxRetries attempts: $ErrorMessage"
+
+        exit 1
+      }
+    }
+  }
+}
+
 try {
   $ArchiveFile = Join-Path $TempDir $ArchiveName
   $ChecksumFile = Join-Path $TempDir "$ArchiveName.sha256"
 
   Write-Host "Downloading $BinaryName $Version for $Target..."
 
-  Invoke-WebRequest -Uri $DownloadUrl -OutFile $ArchiveFile
-  Invoke-WebRequest -Uri $ChecksumUrl -OutFile $ChecksumFile
+  Download-File -Uri $DownloadUrl -OutFile $ArchiveFile
+  Download-File -Uri $ChecksumUrl -OutFile $ChecksumFile
 
   Write-Host "Verifying SHA256 checksum..."
 

scripts/install.sh

@@ -71,15 +71,35 @@ TARGET="${ARCH}-${OS}"
 download() {
   local url="$1"
   local output="$2"
+  local max_retries=3
+  local attempt=0
+  local delay=2
 
-  if command -v curl >/dev/null 2>&1; then
-    curl -fsSL "$url" -o "$output"
-  elif command -v wget >/dev/null 2>&1; then
-    wget -qO "$output" "$url"
-  else
-    echo "Error: Neither curl nor wget was found. Please install one of them." >&2
-    exit 1
-  fi
+  while [ "$attempt" -lt "$max_retries" ]; do
+    attempt=$((attempt + 1))
+
+    if command -v curl >/dev/null 2>&1; then
+      if curl -fsSL --retry 3 --retry-delay 2 -A "onx-installer" "$url" -o "$output"; then
+        return 0
+      fi
+    elif command -v wget >/dev/null 2>&1; then
+      if wget -q --tries=3 --waitretry=2 --user-agent="onx-installer" -O "$output" "$url"; then
+        return 0
+      fi
+    else
+      echo "Error: Neither curl nor wget was found. Please install one of them." >&2
+      exit 1
+    fi
+
+    if [ "$attempt" -lt "$max_retries" ]; then
+      echo "Download attempt ${attempt} failed. Retrying in ${delay}s..." >&2
+      sleep "$delay"
+      delay=$((delay * 2))
+    fi
+  done
+
+  echo "Error: Failed to download ${url} after ${max_retries} attempts." >&2
+  exit 1
 }
 
 if [ -z "${REQUESTED_VERSION}" ]; then