Unhandled error when scan finds directory without read permissions

[mikehaertl]

Describe the bug

It seems the scan process scans all files in ~/.local/shared for some reason.

The scan process seems to hang when it finds a directory without read permissions and leads to errors in other plugins that depend on LSP and run into a timeout.

In my case this happened because Steam on Linux creates directories with root permissions somewhere in my ~/.local directory:

$ l -d '/home/mike/.local/share/Steam/steamapps/compatdata/0/pfx/dosdevices/z:/root'
drwx------ 23 root root 4,0K Sep  4 09:22 /home/mike/.local/share/Steam/steamapps/compatdata/0/pfx/dosdevices/z:/root

To Reproduce
Steps to reproduce the behavior:

1. Create a directory with root perms:
   sudo mkdir ~/.local/shared/x
sudo chmod 700 ~/.local/shared/x
2. Start editing a .vim file that uses LSP

I can maybe provide a minimal vimrc.vim but it also requires to create a read-only directory somewhere in your home.

Expected behavior

The server should skip directories without read permissions.

Maybe an alternative is to restrict which directories are scanned.

Desktop

• OS: Linux Mint 21.2
• Neovim: 0.9.4
• Relevant plugins: nvim-lspconfig, Mason

Log:

[START][2023-11-25 11:02:35] LSP logging initiated
[ERROR][2023-11-25 11:02:35] .../vim/lsp/rpc.lua:734	"rpc"	"/tmp/plugged/mason/bin/vim-language-server"	"stderr"	"node:events:491\n      throw er; // Unhandled 'error' event\n      ^\n\nError: EACCES: permission denied, scandir '/home/mike/.local/share/Steam/steamapps/compatdata/0/pfx/dosdevices/z:/root'\nEmitted 'error' event at:\n    at AsyncReader._handleError (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:22829:23)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:22808:22\n    at worked (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:23378:14)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:22815:24\n    at callFailureCallback (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:22974:5)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/scan.js:22905:20\n    at node:fs:192:23\n    at FSReqCallback.req.oncomplete (node:fs:1412:9) {\n  errno: -13,\n  code: 'EACCES',\n  syscall: 'scandir',\n  path: '/home/mike/.local/share/Steam/steamapps/compatdata/0/pfx/dosdevices/z:/root'\n}\n"
[WARN][2023-11-25 11:02:36] ...lsp/handlers.lua:537	"parser: Send error: Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed\n    at new NodeError (node:internal/errors:387:5)\n    at ChildProcess.target.send (node:internal/child_process:749:16)\n    at send (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27718:17)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27893:62\n    at new Promise (<anonymous>)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27891:62\n    at step (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27674:23)\n    at Object.next (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27655:53)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27649:71\n    at new Promise (<anonymous>)"
[WARN][2023-11-25 11:02:36] ...lsp/handlers.lua:537	"parser: Send error: Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed\n    at new NodeError (node:internal/errors:387:5)\n    at ChildProcess.target.send (node:internal/child_process:749:16)\n    at send (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27718:17)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27893:62\n    at new Promise (<anonymous>)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27891:62\n    at step (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27674:23)\n    at Object.next (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27655:53)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27649:71\n    at new Promise (<anonymous>)"
[WARN][2023-11-25 11:02:36] ...lsp/handlers.lua:537	"parser: Send error: Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed\n    at new NodeError (node:internal/errors:387:5)\n    at ChildProcess.target.send (node:internal/child_process:749:16)\n    at send (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27718:17)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27893:62\n    at new Promise (<anonymous>)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27891:62\n    at step (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27674:23)\n    at Object.next (/tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27655:53)\n    at /tmp/plugged/mason/packages/vim-language-server/node_modules/vim-language-server/out/index.js:27649:71\n    at new Promise (<anonymous>)"