codemod-json

This library makes surgical edits to JSON documents, based on tree-sitter and inspired by tomlkit and pyupgrade. Preserves all whitespace and formatting on lines that don't require changes, and generally within a line as well, so you can make minimal diffs in your codemod tools.

Basic Usage

{
    // some comment
    "version": ["foo"],
    "commands": [], // another comment
}

from codemod_json import parse
stream = parse(somepath.read_bytes())
if stream["version"] == ["2.7"]:
    stream["version"][:] = ["3.6", "3.13"]
somepath.write_bytes(stream.text)

{
    // some comment
    "version": ["3.6", "3.13"],
    "commands": [], // another comment
}

Version Compat

Usage of this library should work back to 3.9 (because of the tree-sitter dep), but development (and mypy compatibility) only on 3.10-3.12. Linting requires 3.12+ for full fidelity.

Versioning

This library follows meanver which basically means semver along with a promise to rename when the major version changes.

License

codemod-json is copyright Tim Hatch, and licensed under the MIT license. See the LICENSE file for details.