envase/dist/cli/validate-markdown.js

Type-safe environment variable validation with Standard Schema compliance

import { styleText } from 'node:util';
import { diffLines } from 'diff';
const normalizeMarkdown = (content) => {
    return content
        .trim()
        .replace(/\r\n/g, '\n')
        .replace(/\n{3,}/g, '\n\n');
};
/**
 * Validates if a markdown file matches the expected documentation
 * generated from the environment schema.
 */
export const validateMarkdown = (actualMarkdown, expectedMarkdown) => {
    const actual = normalizeMarkdown(actualMarkdown);
    const expected = normalizeMarkdown(expectedMarkdown);
    if (actual === expected) {
        return { isValid: true };
    }
    const differences = diffLines(actual, expected)
        .flatMap((change) => {
        const lines = change.value.split('\n');
        // Only remove last element if it's empty (due to trailing newline)
        const linesToProcess = lines.length > 0 && lines[lines.length - 1] === ''
            ? lines.slice(0, -1)
            : lines;
        return linesToProcess.map((line) => {
            if (change.added) {
                return styleText('green', `+ ${line}`);
            }
            if (change.removed) {
                return styleText('red', `- ${line}`);
            }
            return styleText('gray', `  ${line}`);
        });
    })
        .join('\n');
    console.log(differences);
    return {
        isValid: false,
        differences,
    };
};
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