Just use Composer for DeviceDetector.

It was initially my goal to lessen use of Composer, but given I just switched to using NPM packages for asset compilation, it's a little bit silly to try and keep that going.

.gitmodules

@@ -1,9 +1,3 @@
 [submodule "lib/index"]
 	path = lib/index
 	url = https://git.flash.moe/flash/index.git
-[submodule "lib/device-detector"]
-	path = lib/device-detector
-	url = https://github.com/matomo-org/device-detector.git
-[submodule "lib/spyc"]
-	path = lib/spyc
-	url = https://github.com/mustangostang/spyc.git

composer.json

@@ -3,7 +3,8 @@
         "twig/twig": "^3.0",
         "erusev/parsedown": "~1.6",
         "chillerlan/php-qrcode": "^4.3",
-        "symfony/mailer": "^6.0"
+        "symfony/mailer": "^6.0",
+        "matomo/device-detector": "^6.1"
     },
     "autoload": {
         "classmap": [

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d757fc71803876a28a7434df1fa5edf1",
+    "content-hash": "7081b9554d73c42e8288c5dd252f3096",
     "packages": [
         {
             "name": "chillerlan/php-qrcode",
@@ -342,6 +342,125 @@
             },
             "time": "2019-12-30T22:54:17+00:00"
         },
+        {
+            "name": "matomo/device-detector",
+            "version": "6.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/matomo-org/device-detector.git",
+                "reference": "3e0fac7e77f3faadc3858fea9f5fa7efeb9cf239"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/matomo-org/device-detector/zipball/3e0fac7e77f3faadc3858fea9f5fa7efeb9cf239",
+                "reference": "3e0fac7e77f3faadc3858fea9f5fa7efeb9cf239",
+                "shasum": ""
+            },
+            "require": {
+                "mustangostang/spyc": "*",
+                "php": "^7.2|^8.0"
+            },
+            "replace": {
+                "piwik/device-detector": "self.version"
+            },
+            "require-dev": {
+                "matthiasmullie/scrapbook": "^1.4.7",
+                "mayflower/mo4-coding-standard": "^v8.0.0",
+                "phpstan/phpstan": "^0.12.52",
+                "phpunit/phpunit": "^8.5.8",
+                "psr/cache": "^1.0.1",
+                "psr/simple-cache": "^1.0.1",
+                "symfony/yaml": "^5.1.7"
+            },
+            "suggest": {
+                "doctrine/cache": "Can directly be used for caching purpose",
+                "ext-yaml": "Necessary for using the Pecl YAML parser"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "DeviceDetector\\": ""
+                },
+                "exclude-from-classmap": [
+                    "Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "The Matomo Team",
+                    "email": "hello@matomo.org",
+                    "homepage": "https://matomo.org/team/"
+                }
+            ],
+            "description": "The Universal Device Detection library, that parses User Agents and detects devices (desktop, tablet, mobile, tv, cars, console, etc.), clients (browsers, media players, mobile apps, feed readers, libraries, etc), operating systems, devices, brands and models.",
+            "homepage": "https://matomo.org",
+            "keywords": [
+                "devicedetection",
+                "parser",
+                "useragent"
+            ],
+            "support": {
+                "forum": "https://forum.matomo.org/",
+                "issues": "https://github.com/matomo-org/device-detector/issues",
+                "source": "https://github.com/matomo-org/matomo",
+                "wiki": "https://dev.matomo.org/"
+            },
+            "time": "2023-06-06T11:58:07+00:00"
+        },
+        {
+            "name": "mustangostang/spyc",
+            "version": "0.6.3",
+            "source": {
+                "type": "git",
+                "url": "git@github.com:mustangostang/spyc.git",
+                "reference": "4627c838b16550b666d15aeae1e5289dd5b77da0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/mustangostang/spyc/zipball/4627c838b16550b666d15aeae1e5289dd5b77da0",
+                "reference": "4627c838b16550b666d15aeae1e5289dd5b77da0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.1"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.3.*@dev"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.5.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "Spyc.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "mustangostang",
+                    "email": "vlad.andersen@gmail.com"
+                }
+            ],
+            "description": "A simple YAML loader/dumper class for PHP",
+            "homepage": "https://github.com/mustangostang/spyc/",
+            "keywords": [
+                "spyc",
+                "yaml",
+                "yml"
+            ],
+            "time": "2019-09-10T13:16:29+00:00"
+        },
         {
             "name": "psr/container",
             "version": "2.0.2",

lib/device-detector

@@ -1 +0,0 @@
-Subproject commit 3e0fac7e77f3faadc3858fea9f5fa7efeb9cf239

lib/spyc

@@ -1 +0,0 @@
-Subproject commit 4627c838b16550b666d15aeae1e5289dd5b77da0

misuzu.php

@@ -29,12 +29,7 @@ Environment::setDebug(MSZ_DEBUG);
 mb_internal_encoding('utf-8');
 date_default_timezone_set('utc');
 
-// Third party libraries
 require_once MSZ_ROOT . '/vendor/autoload.php';
-require_once MSZ_LIBRARIES . '/spyc/Spyc.php'; // dependency for device-detector
-require_once MSZ_LIBRARIES . '/device-detector/autoload.php';
-
-// Procedural components
 require_once MSZ_ROOT . '/utility.php';
 require_once MSZ_SOURCE . '/perms.php';
 require_once MSZ_SOURCE . '/manage.php';