From 71755bcee83670c93b350b97f1139a6cf44054aa Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@goat.moe>
Date: Thu, 3 Jul 2025 17:59:20 +0300
Subject: [PATCH] Fix hot-reload files not getting cleaned up during startup

Implements minimal required filter support for `FileSystem::DirectoryGetFiles`
in order to support removing hot-reload files on Linux/Apple systems.
---
 .../Engine/Platform/Unix/UnixFileSystem.cpp   | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/Platform/Unix/UnixFileSystem.cpp b/Source/Engine/Platform/Unix/UnixFileSystem.cpp
index cf7ab426c..9242ccd89 100644
--- a/Source/Engine/Platform/Unix/UnixFileSystem.cpp
+++ b/Source/Engine/Platform/Unix/UnixFileSystem.cpp
@@ -423,7 +423,9 @@ bool UnixFileSystem::getFilesFromDirectoryTop(Array<String>& results, const char
             // Validate with filter
             const int32 fullPathLength = StringUtils::Length(fullPath);
             const int32 searchPatternLength = StringUtils::Length(searchPattern);
-            if (searchPatternLength == 0 || StringUtils::Compare(searchPattern, "*") == 0)
+            if (searchPatternLength == 0 ||
+                StringUtils::Compare(searchPattern, "*") == 0 ||
+                StringUtils::Compare(searchPattern, "*.*") == 0)
             {
                 // All files
             }
@@ -431,9 +433,26 @@ bool UnixFileSystem::getFilesFromDirectoryTop(Array<String>& results, const char
             {
                 // Path ending
             }
+            else if (searchPattern[0] == '*' && searchPatternLength > 2 && searchPattern[searchPatternLength-1] == '*')
+            {
+                // Contains pattern
+                bool match = false;
+                for (int32 i = 0; i < pathLength - searchPatternLength - 1; i++)
+                {
+                    int32 len = Math::Min(searchPatternLength - 2, pathLength - i);
+                    if (StringUtils::Compare(&entry->d_name[i], &searchPattern[1], len) == 0)
+                    {
+                        match = true;
+                        break;
+                    }
+                }
+                if (!match)
+                    continue;
+            }
             else
             {
                 // TODO: implement all cases in a generic way
+                LOG(Warning, "DirectoryGetFiles: Wildcard filter is not implemented");
                 continue;
             }