Merge branch 'main' of https://git.research.dezeeuw.ca/hermes/flares

updater.py

@@ -494,11 +494,90 @@ def _remove_readonly(func: Callable[[str], Any], path: str, exc: Any) -> None:
     func(path)
 
 
+def _smart_selective_update(extract_path: str, target_dir: str) -> tuple[int, int]:
+    """
+    Performs selective file replacement by comparing modification times.
+    
+    Issue #113: Smart update that only replaces changed files
+    
+    Args:
+        extract_path: Path to extracted new version files
+        target_dir: Target application directory to update
+        
+    Returns:
+        Tuple of (files_updated, files_skipped)
+        
+    Notes:
+        - Skips plugins/ directory entirely to preserve user plugins
+        - Only copies files that are newer in extract_path than target_dir
+        - Creates missing directories as needed
+        - Uses atomic file operations for safety
+    """
+    import stat
+    
+    files_updated = 0
+    files_skipped = 0
+    
+    # Directories to skip (preserve user data)
+    skip_dirs = {'plugins', '__pycache__', '.git', 'node_modules'}
+    
+    def should_skip_dir(dirname):
+        return dirname in skip_dirs or dirname.startswith('.')
+    
+    def should_copy_file(src_path, dst_path):
+        """Return True if file should be copied (newer or doesn't exist)"""
+        if not os.path.exists(dst_path):
+            return True
+        src_mtime = os.path.getmtime(src_path)
+        dst_mtime = os.path.getmtime(dst_path)
+        # Copy if source is newer by at least 1 second (avoid rounding issues)
+        return src_mtime > dst_mtime + 1
+    
+    # Walk through extracted files
+    for root, dirs, files in os.walk(extract_path):
+        # Filter out directories to skip
+        dirs[:] = [d for d in dirs if not should_skip_dir(d)]
+        
+        for filename in files:
+            src_path = os.path.join(root, filename)
+            
+            # Calculate relative path and destination
+            rel_path = os.path.relpath(src_path, extract_path)
+            dst_path = os.path.join(target_dir, rel_path)
+            
+            # Create destination directory if needed
+            dst_dir = os.path.dirname(dst_path)
+            os.makedirs(dst_dir, exist_ok=True)
+            
+            # Check if file needs updating
+            if should_copy_file(src_path, dst_path):
+                try:
+                    # Atomic copy with metadata preservation
+                    shutil.copy2(src_path, dst_path + '.tmp')
+                    os.rename(dst_path + '.tmp', dst_path)  # Atomic rename
+                    
+                    # Preserve permissions
+                    src_mode = os.stat(src_path).st_mode & stat.S_IWRITE
+                    if src_mode:
+                        try:
+                            os.chmod(dst_path, os.stat(src_path).st_mode)
+                        except Exception as e:
+                            print(f"Warning: Could not set permissions on {dst_path}: {e}")
+                    
+                    files_updated += 1
+                except Exception as e:
+                    print(f"Failed to copy {rel_path}: {e}")
+            else:
+                files_skipped += 1
+    
+    return files_updated, files_skipped
+
+
 def _backup_plugins(platform_name: str, app_name: str, source_dir: str, dest_dir: Optional[str] = None) -> bool:
     """
     Backs up plugins from source directory to a temporary location.
     
-    Issue #113: Preserve plugins during updates
+    Issue #113: Preserve plugins during updates (FALLBACK METHOD - rarely used now)
     
     Returns True if backup was successful, False otherwise.
     """
@@ -619,7 +698,7 @@ def finish_update_if_needed(platform_name: str, app_name: str, cfg_path: str, fi
     """
     Completes a pending application update if '--finish-update' is present in the command-line arguments.
     
-    Issue #113: Added plugin preservation during updates.
+    Issue #113: Added smart selective update (only replaces changed files).
     """
 
     if not finish_update:
@@ -669,6 +748,12 @@ def finish_update_if_needed(platform_name: str, app_name: str, cfg_path: str, fi
 
     primary_update_folder = update_folders[0]
     target_updater_folder = os.path.join(primary_update_folder, f"{app_name}-darwin") if platform_name == 'darwin' else primary_update_folder
+    
+    # 2a. Perform SMART SELECTIVE UPDATE (Issue #113)
+    target_base = get_app_dir()
+    print(f"Performing selective update from: {primary_update_folder}")
+    files_updated, files_skipped = _smart_selective_update(primary_update_folder, target_base)
+    print(f"Selective update complete: {files_updated} files updated, {files_skipped} files skipped")
 
     # 3. Wait for updater process to exit
     print(f"Waiting for {app_name}_updater to exit...")
@@ -739,9 +824,8 @@ def finish_update_if_needed(platform_name: str, app_name: str, cfg_path: str, fi
                 else:
                     print(f"Failed to delete update folder '{folder}' after 3 attempts: {e}")
 
-    # 6. Restore plugins after update (Issue #113)
-    _restore_plugins(platform_name, app_name, target_base)
-
+    # Note: _restore_plugins() no longer needed - selective update preserves plugins automatically
+    
     if "--finish-update" in sys.argv:
         sys.argv.remove("--finish-update")