prettier-plugin-pkg/lib/index.js

An opinionated package.json formatter plugin for Prettier

import babelParser from 'prettier/plugins/babel.js';
import { files } from './rules/files.js';
import { object } from './rules/object.js';
import { dependencyNames, sort } from './rules/sort.js';
const PKG_REG = /[/\\]?package\.json$/;
const { json: { parse }, } = babelParser.parsers;
const format = (properties) => {
    let props = ['engines', 'scripts', ...dependencyNames].reduce((acc, item) => object(acc, item), sort(properties));
    props = files(props);
    return props;
};
export default {
    name: 'prettier-plugin-pkg',
    parsers: {
        'json-stringify': {
            ...babelParser.parsers['json-stringify'],
            parse(text, options) {
                const { filepath } = options;
                const ast = parse(text, options);
                if (PKG_REG.test(filepath)) {
                    ast.node.properties = format(ast.node.properties);
                }
                return ast;
            },
        },
    },
};
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