jello

A command-line JSON processor using Python syntax.

• Pretty-print JSON or JSON-Lines data from stdin to stdout:

cat {file.json} | jello

• Output a schema of JSON or JSON Lines data from stdin to stdout (useful for grep):

cat {file.json} | jello -s

• Output all elements from arrays (or all the values from objects) in JSON or JSON-Lines data from stdin to stdout:

cat {file.json} | jello -l

• Output the first element in JSON or JSON-Lines data from stdin to stdout:

cat {file.json} | jello _[0]

• Output the value of a given key of each element in JSON or JSON-Lines data from stdin to stdout:

cat {file.json} | jello '[i.{key_name} for i in _]'

• Output the value of multiple keys as a new JSON object (assuming the input JSON has the keys `key_name` and `other_key_name`):

cat {file.json} | jello '{"{my_new_key}": _.{key_name}, "{my_other_key}": _.{other_key_name}}'

• Output the value of a given key to a string (and disable JSON output):

cat {file.json} | jello -r '"{some text}: " + _.{key_name}'

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