gftable: transform json input to GitHub Flavored markdown table

README.md

gftable

Command-line which transform JSON array input to GFM Table

Usage

$ echo '{ "rows": [ { "id": 1, "name": "Tomoya" }, { "id": 2, "name": "Tomoko" } ] }' | jq .rows | gftable

output:

| id | name |
| --- | --- |
| 1 | Tomoya |
| 2 | Tomoko |

id	name
1	Tomoya
2	Tomoko

gftable

#!/usr/bin/env node

process.stdin.resume();
process.stdin.setEncoding('utf8');

let data = '';

process.stdin.on('data', chunk => {
  data += chunk;
});

process.stdin.on('end', () => {
  const rows = JSON.parse(data);
  if (!Array.isArray(rows)) {
    console.error('Table row should be an array');
    process.exit(1);
  }
  if (!rows.length) {
    return;
  }
  const keys = Object.keys(rows[0]);
  console.log('|', keys.join(' | '), '|');
  console.log('|', [ ...Array(keys.length) ].fill('---').join(' | '), '|');
  for (const row of rows) {
    const values = keys.map(key => row[key]);
    console.log('|', values.join(' | '), '|');
  }
});