dop reads JSON, YAML, or TOML from stdin, walks the structure field by field, and lets you transform values with Lua. It can also query nested paths and convert between formats.

It weights just 800kb and you don't need Lua installed in your pc.

A few examples:

echo '{"list":[1,2,3]}' | dop -e ' if type(VALUE) == "number" then set(VALUE * 2) end ' # => {"list":[2,4,6]}

echo '{"data":{"some_list":[1,2,3]}}' | dop -q data.some_list # => [1,2,3]

What I wanted was: - something simpler to reason about for non-trivial transforms - one tool for JSON/YAML/TOML - embedded scripting without needing Lua installed separately

Repo: https://github.com/dhuan/dop

Any feedback is welcome.