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In bash, we can use shopt -s expand_aliases to expand aliases in scripts.
What are the equivalent commands for zsh, csh, and tcsh? Do they even exist?
In focusing my efforts on zsh, I haven’t found such a command. I even tried sourcing the file with the aliases inside the script, but it did not work.
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An bash shell alias is nothing but the shortcut to commands. The alias command allows the user to launch any command or group of commands (including options and filenames) by entering a single word. Use alias command to display a list of all defined aliases. You can add user-defined aliases to ~/.
An interactive shell reads commands from user input on a tty. Among other things, such a shell reads startup files on activation, displays a prompt, and enables job control by default. The user can interact with the shell. A shell running a script is always a non-interactive shell.
Shell aliases are shortcut names for commands. Each alias consists of one word (or even one letter) that you can use instead of a longer command line. For example, you may find yourself using the command ls -F a lot. You can easily make a shortcut for that command: lf, for example.
Also, Bash aliases are not expanded when your shell isn't interactive unless the expand_aliases shell option is set using shopt -s . You can check your current setting (on or off) by using shopt expand_aliases . instead. Generally, shell functions are preferred over aliases.
For zsh you can use setopt aliases
#!/usr/bin/zsh
alias hoo="echo bar"
unsetopt aliases
hoo # outputs `./test.zsh:5: command not found: hoo`
setopt aliases
hoo # outputs `bar`
see man zshoptions for detail.
For csh and tcsh, sourcing the files (source ${HOME}/.cshrc, for example) suffices.
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