From d6325faacab4dd6a9c1208c3b9fa702601124ae7 Mon Sep 17 00:00:00 2001
From: Scott Roy <scroy@meta.com>
Date: Tue, 25 Nov 2025 14:23:40 -0800
Subject: [PATCH] Make ExecuTorch CoreML asset/trash/databse folders
 configurable.

Summary:
The ExecuTorch CoreML backend uses various folder locations to store compiled assets, to trash old assets, and to store a databse.


With this diff, all of these are configurable with the following compile-time flags:

* EXECUTORCH_COREML_ASSETS_DIRECTORY_PATH (default value is [cache]/executorchcoreml)
* EXECUTORCH_COREML_TRASH_DIRECTORY_PATH (default value is [tmp]/executorchcoreml)
* EXECUTORCH_COREML_DATABASE_DIRECTORY_PATH (default value is [app support]/executorchcoreml)

Differential Revision: D85064722
---
 .../runtime/delegate/ETCoreMLStrings.mm       | 65 +++++++++++--------
 1 file changed, 38 insertions(+), 27 deletions(-)

diff --git a/backends/apple/coreml/runtime/delegate/ETCoreMLStrings.mm b/backends/apple/coreml/runtime/delegate/ETCoreMLStrings.mm
index fb66f7b7c03..232e3297b76 100644
--- a/backends/apple/coreml/runtime/delegate/ETCoreMLStrings.mm
+++ b/backends/apple/coreml/runtime/delegate/ETCoreMLStrings.mm
@@ -101,39 +101,50 @@ + (NSString *)debugSymbolToHandlesKeyName {
 }
 
 + (nullable NSString *)assetsDirectoryPath {
-    static dispatch_once_t onceToken;
-    static NSString *result = nil;
-    dispatch_once(&onceToken, ^{
-        NSArray<NSString *> *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
-        if (paths.count > 0) {
-            result = [paths.lastObject stringByAppendingPathComponent:self.productName];
-        }
-    });
-    
-    return result;
+    #if defined(EXECUTORCH_COREML_ASSETS_DIRECTORY_PATH)
+        return @(EXECUTORCH_COREML_ASSETS_DIRECTORY_PATH);
+    #else
+        static dispatch_once_t onceToken;
+        static NSString *result = nil;
+        dispatch_once(&onceToken, ^{
+            NSArray<NSString *> *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
+            if (paths.count > 0) {
+                result = [paths.lastObject stringByAppendingPathComponent:self.productName];
+            }
+        });
+        
+        return result;
+    #endif
 }
 
 + (nullable NSString *)trashDirectoryPath {
-    static dispatch_once_t onceToken;
-    static NSString *result = nil;
-    dispatch_once(&onceToken, ^{
-        result = [NSTemporaryDirectory() stringByAppendingPathComponent:self.productName];
-    });
-    
-    return result;
+    #if defined(EXECUTORCH_COREML_TRASH_DIRECTORY_PATH)
+        return @(EXECUTORCH_COREML_TRASH_DIRECTORY_PATH);
+    #else
+        static dispatch_once_t onceToken;
+        static NSString *result = nil;
+        dispatch_once(&onceToken, ^{
+            result = [NSTemporaryDirectory() stringByAppendingPathComponent:self.productName];
+        });
+        
+        return result;
+    #endif
 }
 
 + (nullable NSString *)databaseDirectoryPath {
-    static dispatch_once_t onceToken;
-    static NSString *result = nil;
-    dispatch_once(&onceToken, ^{
-        NSArray<NSString *> *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
-        if (paths.count > 0) {
-            result = [paths.lastObject stringByAppendingPathComponent:self.productName];
-        }
-    });
-    
-    return result;
+    #if defined(EXECUTORCH_COREML_DATABASE_DIRECTORY_PATH)
+        return @(EXECUTORCH_COREML_DATABASE_DIRECTORY_PATH);
+    #else
+        static dispatch_once_t onceToken;
+        static NSString *result = nil;
+        dispatch_once(&onceToken, ^{
+            NSArray<NSString *> *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
+            if (paths.count > 0) {
+                result = [paths.lastObject stringByAppendingPathComponent:self.productName];
+            }
+        });
+        return result;
+    #endif
 }