Acessing variables as $varname

[dundalek]

In bash a variable valuable can be accessed with the dollar sign $varname. That gets value of a local variable and fall backs to environment variable.

In closh it is currently done with (str varname) and (getenv "varname") which can become quite chatty. I am considering whether we should expand variable value with dollar sign too. Should we also fall back to environment variable?

With the fall back $varname could become something like:

(if-let [resolved (resolve 'varname)] (deref resolved) (getenv "varname"))

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Another thing is expansion in strings: "$a/${b}". Here are am leaning against it since it gets complicated with escaping rules.

Workaround can be to used some string interpolation library like strint/<< or cuerdas istr: (istr "~{a}/~{b}"). But maybe we could try to create a library to implement this in a bash compatible way like ($ "$a/${b}").