How can you make the 'brew deps --tree' ?

[xycabcd]

[iandol]

Your question is unclear, what do you mean?

brew deps --tree pyenv
pyenv
├── autoconf
│   ├── m4
│   └── perl
│       ├── berkeley-db@5
│       ├── gdbm
│       ├── expat
│       └── libxcrypt
├── openssl@3
│   └── ca-certificates
├── pkg-config
├── readline
│   └── ncurses
├── bzip2
├── libffi
├── ncurses
├── xz
└── zlib

[xycabcd]

How to write that?

[xycabcd]

I mean write the code

[p-linnane]

https://github.com/Homebrew/brew/blob/master/Library/Homebrew/cmd/deps.rb