drivel
is a command-line tool written in Rust for inferring a schema from an example JSON (or JSON lines) file, and generating synthetic data (the drivel in question)
based on the inferred schema.
- Schema Inference: drivel can analyze JSON input and infer its schema, including data types, array lengths, and object structures.
- Data Generation: Based on the inferred schema, drivel can generate synthetic data that adheres to the inferred structure.
- Easy to integrate: drivel reads JSON input from stdin and writes its output to stdout, allowing for easy integration into pipelines and workflows.
To install the drivel executable, ensure you have the Rust toolchain installed and run:
cargo install drivel
To add drivel as a dependency to your project, e.g., to use the schema inference engine, run:
cargo add drivel
Infer a schema from JSON input, and generate synthetic data based on the inferred schema.
Usage: drivel <COMMAND>
Commands:
describe Describe the inferred schema for the input data
produce Produce synthetic data adhering to the inferred schema
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
Consider a JSON file input.json
:
{
"name": "John Doe",
"id": "0e3a99a5-0201-4444-9ab1-8343fac56233",
"age": 30,
"is_student": false,
"grades": [85, 90, 78],
"address": {
"city": "New York",
"zip_code": "10001"
}
}
Running drivel in 'describe' mode:
cat input.json | drivel describe
Output:
{
"age": int (30),
"address": {
"city": string (8),
"zip_code": string (5)
},
"is_student": boolean,
"grades": [
int (78-90)
] (3),
"name": string (8),
"id": string (uuid)
}
Running drivel in 'produce' mode:
cat input.json | drivel produce -n 3
Output:
[
{
"address": {
"city": "o oowrYN",
"zip_code": "01110"
},
"age": 30,
"grades": [83, 88, 88],
"is_student": true,
"name": "nJ heo D",
"id": "9e0a7687-800d-404b-835f-e7d803b60380"
},
{
"address": {
"city": "oro wwNN",
"zip_code": "11000"
},
"age": 30,
"grades": [83, 88, 89],
"is_student": false,
"name": "oeoooeeh",
"id": "c6884c6b-4f6a-4788-a048-e749ec30793d"
},
{
"address": {
"city": "orww ok ",
"zip_code": "00010"
},
"age": 30,
"grades": [85, 90, 86],
"is_student": false,
"name": "ehnDoJDo",
"id": "71884608-2760-4853-8c12-e11149c642cd"
}
]
We welcome contributions from anyone interested in improving or extending drivel! Whether you have ideas for new features, bug fixes, or improvements to the documentation, feel free to open an issue or submit a pull request.
This project is licensed under the MIT License - see the LICENSE file for details.