fix(nvim): resolve concurrent msgid clashes and eliminate continuous buffer memory leak

server/src/fix_msgid.py

@@ -0,0 +1,44 @@
+import os
+import re
+
+def fix_nvim_msgid():
+    filepath = 'nvim-core/src/lib.rs'
+    with open(filepath, 'r', encoding='utf-8') as f:
+        content = f.read()
+
+    # Add atomic import and static var if not exists
+    if 'static NEXT_MSGID' not in content:
+        atomic_def = "use std::sync::atomic::{AtomicU64, Ordering};\nstatic NEXT_MSGID: AtomicU64 = AtomicU64::new(1);\n"
+        # Find NVIM_CONN
+        conn_idx = content.find('static NVIM_CONN')
+        if conn_idx != -1:
+            content = content[:conn_idx] + atomic_def + content[conn_idx:]
+
+    # Replace all hardcoded msgid
+    # e.g., RmpValue::Integer(1.into()), // msgid
+    # with: let msgid = NEXT_MSGID.fetch_add(1, Ordering::SeqCst); ... RmpValue::Integer(msgid.into()),
+
+    # We need to insert `let msgid = NEXT_MSGID.fetch_add(1, Ordering::SeqCst);` before `let req = RmpValue::Array(vec![`
+    
+    # We will use regex to find the blocks
+    funcs = [
+        ('send_nvim_command', '1'),
+        ('get_nvim_active_buffer', '2'),
+        ('get_nvim_cursor', '3'),
+        ('get_nvim_visual_selection', '4'),
+        ('set_nvim_diagnostics', '5'),
+        ('execute_nvim_lua', '6'),
+    ]
+
+    for func, old_id in funcs:
+        pattern = rf"let req = RmpValue::Array\(vec!\[\s*RmpValue::Integer\(0\.into\(\)\),\s*RmpValue::Integer\({old_id}\.into\(\)\), // msgid"
+        replacement = f"let msgid = NEXT_MSGID.fetch_add(1, Ordering::SeqCst);\n    let req = RmpValue::Array(vec![\n        RmpValue::Integer(0.into()),\n        RmpValue::Integer(msgid.into()), // msgid"
+        
+        content = re.sub(pattern, replacement, content)
+
+    with open(filepath, 'w', encoding='utf-8') as f:
+        f.write(content)
+
+    print('Fixed msgid allocations')
+
+fix_nvim_msgid()