remove useless error messages when uv is set but no config file exists

Author: Kattos

src/recipe/lang/Python/uv.c

@@ -94,15 +94,21 @@ pl_python_uv_setsrc (char *option)
                             uv_config);
   char *append_source_cmd = xy_strjoin (4, "printf '", source_content, "' >> ", uv_config);
 
-  // grep -q '^[[index]]$' uv_config && update_source_cmd || append_source_cmd
-  // 如果 uv_config 中存在 [[index]] 则更新, 否则追加到文件末尾
-  // 文件不存在也是追加到新文件末尾
-  char *cmd = xy_strjoin (6, "grep -q '^\\[\\[index\\]\\]$' ",
-                             uv_config,
-                             " && ",
-                             update_source_cmd,
-                             " || ",
-                             append_source_cmd);
+  char *cmd = NULL;
+  if (!xy_file_exist(uv_config)) {
+    // uv_config 不存在，追加到新文件末尾
+    // run: append_source_cmd
+    cmd = append_source_cmd;
+  } else {
+    // uv_config 存在，如果存在 [[index]] 则更新，否则追加到文件末尾
+    // run: grep -q '^[[index]]$' uv_config && update_source_cmd || append_source_cmd
+    cmd = xy_strjoin (6, "grep -q '^\\[\\[index\\]\\]$' ",
+                         uv_config,
+                         " && ",
+                         update_source_cmd,
+                         " || ",
+                         append_source_cmd);
+  }
 
   chsrc_run (cmd, RunOpt_Default);