index.js

#! node
import '@dfoverdx/tocamelcase';
import fs from 'fs';
import path from 'path';
import { isBinaryFileSync } from 'isbinaryfile';
import json5 from 'json5';
import stringifyObject from 'stringify-object';
const files = process.argv.slice(2);
for (const file of files) {
    if (!fs.existsSync(file)) {
        console.error(`File '${file}' does not exist.`);
        process.exit(1);
    }
    if (!fs.statSync(file).isFile()) {
        console.error(`File '${file}' is not a file.  It is likely a directory.`);
        process.exit(1);
    }
    const buffer = fs.readFileSync(file);
    if (isBinaryFileSync(buffer)) {
        console.error(`File '${file}' is not a text file.`);
    }
    const text = buffer.toString();
    let json;
    let jsonText;
    try {
        json = json5.parse(text);
        jsonText = stringifyObject(json, {
            indent: '  ',
            inlineCharacterLimit: 80,
        });
    }
    catch {
        console.error(`File '${file}' is not a valid json file.`);
        process.exit(1);
    }
    // if (json == null) {
    //   console.error(`File '${file}' is a valid json file, but parses as 'null', which cannot be set to a const`)
    // }
    const [declarationType, equals, terminator] = typeof json === 'object'
        ? json && !Array.isArray(json)
            ? ['interface', '', '']
            : ['type', ' =', ';']
        : ['const', ' =', ';'];
    const name = path.basename(file);
    const typeName = (name.includes('.') ? name.slice(0, name.indexOf('.')) : name).toCamelCase(true);
    const output = `${declarationType !== 'const'
        ? `${declarationType} ${typeName}${equals} ${jsonText}${terminator}

declare const ${typeName}: ${typeName};`
        : `declare ${declarationType} ${typeName}${equals} ${jsonText}${terminator}`}

export = ${typeName};`;
    console.log(`Writing ${file}.d.ts`);
    fs.writeFileSync(`${file}.d.ts`, output);
}