[cosmos0072]

I found another, possibly simpler solution.

The functions (sh-fd-stdin) (sh-fd-stdout) and (sh-fd-stderr) return the integer file descriptors that a schemesh builtin should use to perform I/O.

With them, you can do

  true (lambda () (lisp-expr-writes-to-fd (sh-fd-stdout))) | grep foo | true (lambda () (lisp-expr-reads-from-fd (sh-fd-stdin)))

It should work :)

[pama]

Could this be abstracted enough with the right macros to make a subset of useful lisp commands play well with the shell? It could be a powerful way to extend the shell for interactive use.

[cosmos0072]

Yes, that's definitely feasible.

I am currently working on it, the macro will be named (shell-expr) and replace the current experimental (shell-test)