I am trying to install Ocaml-Top IDE from command line. I have already installed Ocaml and OPAM using Homebrew (brew install opam, brew install ocaml), but when I enter:
opam install ocaml-top
I get
[ERROR] No OPAM root found at /Users/student/.opam.
Do I need to add this to my PATH?
UPDATE: Suggestion helped, but there is an issue with the package name: I get
[ERROR] No package named ocaml-top found.
You appear to have missed the following caveat, notably opam init, when you ran brew install opam:
$ brew info opam
...
==> Caveats
OPAM uses ~/.opam by default for its package database, so you need to
initialize it first by running (as a normal user):
$ opam init
Run the following to initialize your environment variables:
$ eval `opam config env`
To export the needed variables every time, add them to your dotfiles.
* On Bash, add them to `~/.bash_profile`.
* On Zsh, add them to `~/.zprofile` or `~/.zshrc` instead.
Documentation and tutorials are available at https://opam.ocaml.org, or
via "man opam" and "opam --help".
Bash completion has been installed to:
/usr/local/etc/bash_completion.d
zsh completions have been installed to:
/usr/local/share/zsh/site-functions