Run XUI installer non-interactively with auto-generated license

XUI 1.5.13 is the post-shutdown license-free build: the installer's
isValidLicense() only checks len==16 + hex, and the license servers are
offline. Auto-generate a 16-hex key (openssl rand -hex 8), inject it, and
answer the sysctl prompt — fully unattended by default. Adds XUI_LICENSE,
XUI_SYSCTL, XUI_INTERACTIVE env vars and surfaces the panel setup URL.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

install_xui.sh

@@ -33,6 +33,21 @@ EXPECTED_SHA256="${XUI_SHA256-a92e5f21a338c56190d7580f449492c970b5d4219474548ca5
 
 WORKDIR="${XUI_WORKDIR:-/opt/xui_install}"
 
+# License key. XUI 1.5.13 is the post-shutdown, license-free build: the patched
+# extensions removed all license verification and the GTAXUI license servers are
+# offline. The bundled installer only checks that the key is exactly 16 hex chars
+# (isValidLicense: len==16 and all hex) — it never phones home. So any valid hex
+# works; we auto-generate one unless XUI_LICENSE is provided.
+XUI_LICENSE="${XUI_LICENSE:-}"
+
+# Answer to the installer's "Overwrite sysctl configuration?" prompt (Y/N).
+# Y is recommended (sets XUI's TCP tuning + open-file limits).
+XUI_SYSCTL="${XUI_SYSCTL:-Y}"
+
+# Set XUI_INTERACTIVE=1 to answer the installer's prompts yourself instead of
+# letting this wrapper drive them non-interactively.
+XUI_INTERACTIVE="${XUI_INTERACTIVE:-0}"
+
 # ---------------------------------------------------------------------------
 # Helpers
 # ---------------------------------------------------------------------------
@@ -44,6 +59,22 @@ ok()    { printf '%s[+]%s %s\n' "$c_green"  "$c_reset" "$*"; }
 warn()  { printf '%s[!]%s %s\n' "$c_yellow" "$c_reset" "$*"; }
 die()   { printf '%s[x]%s %s\n' "$c_red"    "$c_reset" "$*" >&2; exit 1; }
 
+# Return a valid 16-char hex license: use XUI_LICENSE if set (validated), else
+# generate a random one.
+resolve_license() {
+  if [ -n "$XUI_LICENSE" ]; then
+    if printf '%s' "$XUI_LICENSE" | grep -Eq '^[0-9a-fA-F]{16}$'; then
+      printf '%s' "$XUI_LICENSE"; return 0
+    fi
+    die "XUI_LICENSE must be exactly 16 hex chars (got: '$XUI_LICENSE')."
+  fi
+  if command -v openssl >/dev/null 2>&1; then
+    openssl rand -hex 8
+  else
+    head -c 8 /dev/urandom | od -An -tx1 | tr -d ' \n'
+  fi
+}
+
 banner() {
   cat <<'EOF'
 
@@ -160,20 +191,42 @@ extract_and_run() {
   info "Setting permissions..."
   chmod +x install
 
-  cat <<'EOF'
+  if [ "$XUI_INTERACTIVE" = "1" ]; then
+    cat <<'EOF'
 
 -----------------------------------------------
- Handing over to the XUI installer.
+ Handing over to the XUI installer (interactive).
  You will be prompted for:
-   - your license key
+   - your license key (any 16-char hex works)
    - sysctl overwrite (answer Y — recommended)
- After it finishes, MySQL credentials are saved
- to /root/credentials.txt
 -----------------------------------------------
 
 EOF
-  info "Starting XUI install..."
-  ./install
+    info "Starting XUI install..."
+    ./install
+    return
+  fi
+
+  LICENSE="$(resolve_license)"
+  local log="$WORKDIR/install.log"
+  cat <<EOF
+
+-----------------------------------------------
+ Running the XUI installer non-interactively.
+   License key : $LICENSE
+   sysctl       : answering '$XUI_SYSCTL'
+ (license servers are offline; any valid 16-hex
+  key works — this build never phones home)
+-----------------------------------------------
+
+EOF
+  info "Starting XUI install... (full log: $log)"
+  # Feed: license key, then the sysctl answer. The extra answers cover any
+  # conditional Y/N prompt without blocking. pipefail propagates install errors.
+  printf '%s\n%s\nY\nY\n' "$LICENSE" "$XUI_SYSCTL" | ./install 2>&1 | tee "$log"
+
+  # Surface the panel setup URL the installer prints at the end.
+  SETUP_URL="$(grep -aoE 'http://[0-9.]+/[A-Za-z0-9]+' "$log" | tail -1 || true)"
 }
 
 # ---------------------------------------------------------------------------
@@ -185,7 +238,20 @@ main() {
   ensure_deps
   fetch
   extract_and_run
-  ok "Installer finished. Check /root/credentials.txt for your panel details."
+
+  echo
+  ok "XUI installation finished."
+  if [ "$XUI_INTERACTIVE" != "1" ]; then
+    printf '%s\n' "-----------------------------------------------"
+    [ -n "${SETUP_URL:-}" ] && printf '  Panel setup URL : %s\n' "$SETUP_URL"
+    printf '  License key     : %s\n' "${LICENSE:-<entered interactively>}"
+    printf '  MySQL creds     : %s/credentials.txt\n' "$WORKDIR"
+    printf '  Full log        : %s/install.log\n' "$WORKDIR"
+    printf '%s\n' "-----------------------------------------------"
+    warn "Save credentials.txt somewhere safe, then open the setup URL to finish."
+  else
+    info "Check ${WORKDIR}/credentials.txt and the 'Continue Setup' URL above."
+  fi
 }
 
 main "$@"