Does zsh have any equivalent to BASH_ENV?

Question

I would like to be able to use something like the BASH_ENV variable in zsh, however I can't find anything like it by Googling.

From man bash:

BASH_ENV

If this parameter is set when bash is executing a shell script, its value is interpreted as a filename containing commands to initialize the shell, as in ~/.bashrc. The value of BASH_ENV is subjected to parameter expansion, command substitution, and arithmetic expansion before being interpreted as a filename. PATH is not used to search for the resultant filename.

Does zsh have something like this?

Answer 1

The closest I can think of is ZDOTDIR. Zsh reads its user initialization files in the directory $ZDOTDIR, falling back to $HOME if ZDOTDIR is unset. When zsh is running a script, it loads the user initialization file .zshenv.

So if in bash you'd have a file /path/to/my-bash-env containing

wibble

and you'd run env BASH_ENV=/path/to/my-bash-env /path/to/script.bash, then in zsh you can have a file /path/to/my-zsh-dir/.zshenv containing

if [[ -e ~/.zshenv ]]; then . ~/.zshenv; fi
wibble

and run env ZDOTDIR=/path/to/my-zsh-dir /path/to/script.zsh.