janet-sh
The rationale and design is partially covered in a blog post
Quick examples
(import sh)
# raise an error on failure.
(sh/$ touch foo.txt)
# raise an error on failure, return command output.
(sh/$< echo "hello world!")
"hello world!\n"
# return true or false depending on process success.
(when (sh/$? true)
(print "cool!"))
# pipelines
(sh/$ cat ,path | sort | uniq)
# pipeline matching
(match (sh/run yes | head -n5)
[0 0] :ok)