Configuration file for shell script?

Question

Is it possible to define a configuration file for zsh scripts?

I am running macOS 10.15 and the default shell is zsh. I have defined, i.e., alias abc="echo yes" in ~/.zshrc, ~/.zsh_profile, ~/.profile, and ~/.zsh_login, every configuration file I can think of. However, a shell script t.sh calling abc will complain command not found: abc:

⇒  cat t.sh
abc
⇒  zsh t.sh
t.sh:1: command not found: abc
⇒  sh t.sh
t.sh: line 1: abc: command not found

I understand that adding a line source ~/.zshrc or source ~/.zsh_login on the top of t.sh will work, but I wonder is it possible to set a configuration file that runs by default for any zsh script executed on my machine (by me)?

I'm asking this because I want to set an alias that works when I envoke a command inside vim via :!, e.g. :!abc, as well as the ] command in the program nnn. Also please let me know if this is irrelevant to what I asked above. I'm confused of the login shell and non-login shell, or other types of shell. FYI, in vim, :!echo $0 will return /bin/zsh and :!whoami will return ***(my name), so it seems like it's a login shell.

Answer 1

For any zsh script you run, ~/.zshenv will be sourced:

=> cat ~/.zshenv
alias abc="echo yes"
=> cat t.sh
abc
=> zsh t.sh
yes

A simplified hierarchy of dotfiles for zsh:

• ~/.zshenv - sourced for all zsh scripts.
• ~/.zshrc - sourced for all interactive zsh sessions (those attached to a terminal). This is usually the best place to put aliases.
• ~/.zprofile - sourced for a login zsh session, i.e. the first interactive session in a set.

For your usage, it may be preferable to configure MacVim to launch an interactive shell so it'll pick up aliases from ~/.zshrc. To do that, add this to your ~/.gvimrc (note the g) file:

let &shell='/bin/zsh -i'

For other vim flavors, you may have to do something a bit more complicated - see the answers here:
https://vi.stackexchange.com/questions/16186/how-to-run-zsh-aliased-command-from-vim-command-mode