Simple Sheens I/O

This program reads messages from stdin and writes messages to stdout. It aspires to be compatible with Little Sheens's sheensio.

Currently the steps output is very different, but the updated and out lines should be compatible (with the possible exception of JSON property rendering order from Little Sheens).

Usage

This program expects JSON specs, so you'll need to convert a spec in YAML to a spec in JSON. yaml2json can do that.

go get github.com/bronze1man/yaml2json

cat specs/double.yaml | yaml2json | jq . > specs/double.js

cat<<EOF > crew.json
{"id":"simpsons",
 "machines":{
     "m1":{"spec":"double.js","node":"start","bs":{}}}}
EOF

echo '{"double":3}' | sheensio

produces

out      {"doubled":6}

The JSON on the out lines is canonical (in the sense that properties are sorted lexicographically).

Note that the order of processing among machines within a crew is unspecified; therefore, the order of messages emitted by multiple machines is unspecified. If your crew has only one machine, then the order of emitted messages is specified completely by that machine.