macOS: add tilde-based path expander

Replaces `HOME` environment variable usage for user
directories like in D12802.

Reviewed By: #platform_macos, brecht
Differential Revision: https://developer.blender.org/D13212

1 files changed, 17 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/storage_apple.mm b/source/blender/blenlib/intern/storage_apple.mm
index 07091f2b055..b0234b9a093 100644
--- a/source/blender/blenlib/intern/storage_apple.mm
+++ b/source/blender/blenlib/intern/storage_apple.mm
@@ -184,3 +184,20 @@ eFileAttributes BLI_file_attributes(const char *path)
 
   return (eFileAttributes)ret;
 }
+
+const char *BLI_expand_tilde(const char *path_with_tilde)
+{
+  static char path_expanded[FILE_MAX];
+  @autoreleasepool {
+    const NSString *const str_with_tilde = [[NSString alloc] initWithCString:path_with_tilde
+                                                                    encoding:NSUTF8StringEncoding];
+    if (!str_with_tilde) {
+      return nullptr;
+    }
+    const NSString *const str_expanded = [str_with_tilde stringByExpandingTildeInPath];
+    [str_expanded getCString:path_expanded
+                   maxLength:sizeof(path_expanded)
+                    encoding:NSUTF8StringEncoding];
+  }
+  return path_expanded;
+}