--dir argument required for completions

Describe the bug

generating completions requires the --dir argument.

To Reproduce

$ badger completion bash --dir /tmp
Listening for /debug HTTP requests at port: 8080
Port busy. Trying another one...
Listening for /debug HTTP requests at port: 8081
jemalloc enabled: false
Using Go memory
...
# ex: ts=4 sw=4 et filetype=sh
Num Allocated Bytes at program end: 0 B

Expected behavior

Generating completions should not require the --dir argument to be passed. But even if a directory is passed, debug messages are included in the completion output.

Environment

• OS: Arch Linux
• Language: English
• Version 4.9.4

Additional context