`--doc` CLI argument does not work

How are you using the lua-language-server?

Command Line

Which OS are you using?

Windows WSL

What is the issue affecting?

Other

Expected Behaviour

Document generation, as documented here:

https://luals.github.io/wiki/usage/#--doc

Actual Behaviour

rhys@RhysDesktop:~/example-lua$ ~/lua-language-server/bin/lua-language-server --doc ~/example-lua/
root uri = file:///home/rhys/example-lua/
script/cli/doc/export.lua:304: attempt to concatenate a nil value (local 'outputDir')
stack traceback:
        script/cli/doc/export.lua:304: in field 'serializeAndExport'
        script/cli/doc/init.lua:235: in upvalue 'callback'
        script/lclient.lua:129: in function <script/lclient.lua:128>
stack traceback:
        script/lclient.lua:123: in function 'await.errorHandle'
        script/await.lua:35: in function 'await.checkResult'
        (...tail calls...)
        [C]: in function 'xpcall'
        script/timer.lua:52: in upvalue 'mWakeup'
        script/timer.lua:93: in upvalue 'onTick'
        script/timer.lua:236: in function 'timer.update'
        script/lclient.lua:139: in method 'start'
        script/cli/doc/init.lua:201: in function 'cli.doc.runCLI'
        script/cli/init.lua:22: in main chunk
        [C]: in function 'require'
        /home/rhys/lua-language-server/main.lua:78: in main chunk
        (bootstrap.lua):85: in main chunk
        [C]: in ?
script/lclient.lua:124: [19:48:24.474][error][#0:script/lclient.lua:123]: script/cli/doc/export.lua:304: attempt to concatenate a nil value (local 'outputDir')
stack traceback:
        script/cli/doc/export.lua:304: in field 'serializeAndExport'
        script/cli/doc/init.lua:235: in upvalue 'callback'
        script/lclient.lua:129: in function <script/lclient.lua:128>
stack traceback:
        script/lclient.lua:123: in function 'await.errorHandle'
        script/await.lua:35: in function 'await.checkResult'
        (...tail calls...)
        [C]: in function 'xpcall'
        script/timer.lua:52: in upvalue 'mWakeup'
        script/timer.lua:93: in upvalue 'onTick'
        script/timer.lua:236: in function 'timer.update'
        script/lclient.lua:139: in method 'start'
        script/cli/doc/init.lua:201: in function 'cli.doc.runCLI'
        script/cli/init.lua:22: in main chunk
        [C]: in function 'require'
        /home/rhys/lua-language-server/main.lua:78: in main chunk
        (bootstrap.lua):85: in main chunk
        [C]: in ?

stack traceback:
        [C]: in function 'error'
        script/lclient.lua:124: in function 'await.errorHandle'
        script/await.lua:35: in function 'await.checkResult'
        (...tail calls...)
        [C]: in function 'xpcall'
        script/timer.lua:52: in upvalue 'mWakeup'
        script/timer.lua:93: in upvalue 'onTick'
        script/timer.lua:236: in function 'timer.update'
        script/lclient.lua:139: in method 'start'
        script/cli/doc/init.lua:201: in function 'cli.doc.runCLI'
        script/cli/init.lua:22: in main chunk
        [C]: in function 'require'
        /home/rhys/lua-language-server/main.lua:78: in main chunk
        (bootstrap.lua):85: in main chunk
        [C]: in ?
/home/rhys/lua-language-server/bin/lua-language-server: script/lclient.lua:149: two hours later ...
====== C -> S ======
====== S -> C ======
====================
stack traceback:
        [C]: in function 'error'
        script/lclient.lua:149: in method 'start'
        script/cli/doc/init.lua:201: in function 'cli.doc.runCLI'
        script/cli/init.lua:22: in main chunk
        [C]: in function 'require'
        /home/rhys/lua-language-server/main.lua:78: in main chunk
        (bootstrap.lua):85: in main chunk
        [C]: in ?

Reproduction steps

1. Create a new folder
2. Add any documented lua file, I used this:

---@param x number
function foo(x) end

3. Run lua-language-server --doc <path-to-folder>

Additional Notes

I tried this on both Windows and WSL with the same result.

Log File

No response

Bắt đầu với script/cli/doc/export.lua tại lỗi serializeAndExport ở dòng 304, sau đó theo dõi cách script/cli/doc/init.lua gọi nó cho --doc. Tái hiện lệnh với một thư mục chứa tệp Lua được lập tài liệu. Hoàn thành khi lệnh chạy xong mà không có lỗi nil outputDir và tạo ra tài liệu như mong đợi.