Update frigate-install.sh

The silent() function (used when \=silent in non-verbose mode) calls
exit on any non-zero return code. This prevents the if/else fallback
pattern from ever reaching the else branch, causing the entire install
to abort instead of gracefully falling back to CPU model.

The upstream TF/OpenVino symbol incompatibility (_ZN6tflite15metrics_wrapper...)
is not something we can fix, but the graceful fallback should work correctly.

Replaced \ with direct output suppression (&>/dev/null) so the if
condition properly evaluates the return code.

Ref #12689

install/frigate-install.sh

@@ -208,7 +208,7 @@ msg_info "Building OpenVino Model"
 cd /models
 wget -q http://download.tensorflow.org/models/object_detection/ssdlite_mobilenet_v2_coco_2018_05_09.tar.gz
 $STD tar -zxf ssdlite_mobilenet_v2_coco_2018_05_09.tar.gz --no-same-owner
-if $STD python3 /opt/frigate/docker/main/build_ov_model.py; then
+if python3 /opt/frigate/docker/main/build_ov_model.py &>/dev/null; then
   cp /models/ssdlite_mobilenet_v2.xml /openvino-model/
   cp /models/ssdlite_mobilenet_v2.bin /openvino-model/
   wget -q https://github.com/openvinotoolkit/open_model_zoo/raw/master/data/dataset_classes/coco_91cl_bkgr.txt -O /openvino-model/coco_91cl_bkgr.txt

misc/tools.func

@@ -969,43 +969,13 @@ verify_repo_available() {
 }
 
 # ------------------------------------------------------------------------------
-# Ensure dependencies are installed (with apt/apk update caching)
-# Supports both Debian (apt/dpkg) and Alpine (apk) systems
+# Ensure dependencies are installed (with apt update caching)
 # ------------------------------------------------------------------------------
 ensure_dependencies() {
   local deps=("$@")
   local missing=()
 
-  # Detect Alpine Linux
-  if [[ -f /etc/alpine-release ]]; then
-    for dep in "${deps[@]}"; do
-      if command -v "$dep" &>/dev/null; then
-        continue
-      fi
-      if apk info -e "$dep" &>/dev/null; then
-        continue
-      fi
-      missing+=("$dep")
-    done
-
-    if [[ ${#missing[@]} -gt 0 ]]; then
-      $STD apk add --no-cache "${missing[@]}" || {
-        local failed=()
-        for pkg in "${missing[@]}"; do
-          if ! $STD apk add --no-cache "$pkg" 2>/dev/null; then
-            failed+=("$pkg")
-          fi
-        done
-        if [[ ${#failed[@]} -gt 0 ]]; then
-          msg_error "Failed to install dependencies: ${failed[*]}"
-          return 1
-        fi
-      }
-    fi
-    return 0
-  fi
-
-  # Debian/Ubuntu: Fast batch check using dpkg-query
+  # Fast batch check using dpkg-query (much faster than individual checks)
   local installed_pkgs
   installed_pkgs=$(dpkg-query -W -f='${Package}\n' 2>/dev/null | sort -u)
 
@@ -1102,15 +1072,11 @@ create_temp_dir() {
 }
 
 # ------------------------------------------------------------------------------
-# Check if package is installed (supports both Debian and Alpine)
+# Check if package is installed (faster than dpkg -l | grep)
 # ------------------------------------------------------------------------------
 is_package_installed() {
   local package="$1"
-  if [[ -f /etc/alpine-release ]]; then
-    apk info -e "$package" &>/dev/null
-  else
-    dpkg-query -W -f='${Status}' "$package" 2>/dev/null | grep -q "^install ok installed$"
-  fi
+  dpkg-query -W -f='${Status}' "$package" 2>/dev/null | grep -q "^install ok installed$"
 }
 
 # ------------------------------------------------------------------------------