Schemesh – Unix shell and Lisp REPL, now with structured pipelines

cosmos0072

First stable release appeared on HN one year ago: https://news.ycombinator.com/item?id=43061183 Thanks for all the feedback! Today, version 1.0.0 adds structured pipelines: a mechanism to exchange (almost) arbitrary objects via POSIX pipes, and transform them via external programs, shell builtins or Scheme code. Example: dir /proc | where name -starts k | sort-by modified possible output: ┌───────────┬────┬───────────────┬────────┐ │ name │type│ size │modified│ ├───────────┼────┼───────────────┼────────┤ │kcore │file│140737471590400│09:32:44│ │kmsg │file│ 0│09:32:49│ │kallsyms │file│ 0│09:32:50│ │kpageflags │file│ 0│10:42:53│ │keys │file│ 0│10:42:53│ │kpagecount │file│ 0│10:42:53│ │key-users │file│ 0│10:42:53│ │kpagecgroup│file│ 0│10:42:53│ └───────────┴────┴───────────────┴────────┘ Another example: ip -j route | select dst dev prefsrc | to json1 possible output: [{"dst":"default","dev":"eth0"}, {"dst":"192.168.0.0/24","dev":"eth0","prefsrc":"192.168.0.2"}] Internally, objects are serialized before writing them to a pipe - by default as NDJSON, but it can be set manually - and deserialized when reading them from a pipe. This allows arbitrary transformations at each pipeline step: filtering, choosing a subset of the fields, sorting with user-specified criteria, etc. And each step can be an executable program, a shell builtin or Scheme code. If you know nushell, they will feel familiar as they are inspired by it - the implementation is fully independent, though.

ascent817

I'm not too familiar, but is this similar to nushell?