From 0539188858b4302428d3231e85a79d9b9b0981e2 Mon Sep 17 00:00:00 2001
From: Harlan Zhou <zhouhua258@outlook.com>
Date: Sun, 26 Apr 2026 02:37:55 +0000
Subject: [PATCH] fix: use os.homedir() instead of process.env.HOME for HF
 cache dir

On Windows, HOME env is often unset, causing cache to be written to
'./undefined/'. Using os.homedir() ensures cross-platform compatibility
while preserving HF_HOME priority.

Fixes #1068
---
 gitnexus/src/core/embeddings/embedder.ts | 3 ++-
 gitnexus/src/mcp/core/embedder.ts        | 4 +++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/gitnexus/src/core/embeddings/embedder.ts b/gitnexus/src/core/embeddings/embedder.ts
index d27718ce54..66be646c1e 100644
--- a/gitnexus/src/core/embeddings/embedder.ts
+++ b/gitnexus/src/core/embeddings/embedder.ts
@@ -15,6 +15,7 @@ if (!process.env.ORT_LOG_LEVEL) {
 }
 
 import { pipeline, env, type FeatureExtractionPipeline } from '@huggingface/transformers';
+import os from 'os';
 import { existsSync } from 'fs';
 import { execFileSync } from 'child_process';
 import { join, dirname } from 'path';
@@ -161,7 +162,7 @@ export const initEmbedder = async (
       // ./node_modules/.cache inside its own install dir, which is unwritable
       // when gitnexus is installed globally (e.g. /usr/lib/node_modules/).
       // Respect HF_HOME if set, otherwise fall back to ~/.cache/huggingface.
-      env.cacheDir = process.env.HF_HOME ?? `${process.env.HOME}/.cache/huggingface`;
+      env.cacheDir = process.env.HF_HOME ?? join(os.homedir(), '.cache', 'huggingface');
 
       const isDev = process.env.NODE_ENV === 'development';
       if (isDev) {
diff --git a/gitnexus/src/mcp/core/embedder.ts b/gitnexus/src/mcp/core/embedder.ts
index 592c2bba91..9523b13058 100644
--- a/gitnexus/src/mcp/core/embedder.ts
+++ b/gitnexus/src/mcp/core/embedder.ts
@@ -6,6 +6,8 @@
  */
 
 import { pipeline, env, type FeatureExtractionPipeline } from '@huggingface/transformers';
+import os from 'os';
+import { join } from 'path';
 import {
   isHttpMode,
   getHttpDimensions,
@@ -46,7 +48,7 @@ export const initEmbedder = async (): Promise<FeatureExtractionPipeline> => {
       // ./node_modules/.cache inside its own install dir, which is unwritable
       // when gitnexus is installed globally (e.g. /usr/lib/node_modules/).
       // Respect HF_HOME if set, otherwise fall back to ~/.cache/huggingface.
-      env.cacheDir = process.env.HF_HOME ?? `${process.env.HOME}/.cache/huggingface`;
+      env.cacheDir = process.env.HF_HOME ?? join(os.homedir(), '.cache', 'huggingface');
 
       console.error('GitNexus: Loading embedding model (first search may take a moment)...');