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#!/usr/bin/env node
// Usage: tools/update-author.js [--dry]
// Passing --dry will redirect output to stdout rather than write to 'AUTHORS'.
'use strict';
const { spawn } = require('child_process');
const path = require('path');
const fs = require('fs');
const readline = require('readline');
class CaseIndifferentMap {
_map = new Map();
get(key) { return this._map.get(key.toLowerCase()); }
has(key) { return this._map.has(key.toLowerCase()); }
set(key, value) { return this._map.set(key.toLowerCase(), value); }
}
const log = spawn(
'git',
// Inspect author name/email and body.
['log', '--reverse', '--format=Author: %aN <%aE>\n%b'], {
stdio: ['inherit', 'pipe', 'inherit']
});
const rl = readline.createInterface({ input: log.stdout });
let output;
if (process.argv.includes('--dry'))
output = process.stdout;
else
output = fs.createWriteStream('AUTHORS');
output.write('# Authors ordered by first contribution.\n\n');
const mailmap = new CaseIndifferentMap();
{
const lines = fs.readFileSync(path.resolve(__dirname, '../', '.mailmap'),
{ encoding: 'utf8' }).split('\n');
for (let line of lines) {
line = line.trim();
if (line.startsWith('#') || line === '') continue;
const match = line.match(/^(?:([^<]+)\s+)?(?:(<[^>]+>)\s+)?(?:([^<]+)\s+)?(<[^>]+>)$/);
if (match) {
const [, replaceName, replaceEmail, originalName, originalEmail] = match;
const key = originalName ? `${originalName}\0${originalEmail.toLocaleLowerCase()}` : originalEmail.toLowerCase();
mailmap.set(key, {
author: replaceName || originalName,
email: replaceEmail || originalEmail,
});
} else {
console.warn('Unknown .mailmap format:', line);
}
}
}
const previousAuthors = new CaseIndifferentMap();
{
const lines = fs.readFileSync(path.resolve(__dirname, '../', 'AUTHORS'),
{ encoding: 'utf8' }).split('\n');
for (let line of lines) {
line = line.trim();
if (line.startsWith('#') || line === '') continue;
const match = line.match(/^([^<]+)\s+(<[^>]+>)$/);
if (match) {
const name = match[1];
const email = match[2];
if (previousAuthors.has(name)) {
const emails = previousAuthors.get(name);
emails.push(email);
} else {
previousAuthors.set(name, [email]);
}
} else {
console.warn('Unknown AUTHORS format:', line);
}
}
}
const seen = new Set();
// Support regular git author metadata, as well as `Author:` and
// `Co-authored-by:` in the message body. Both have been used in the past
// to indicate multiple authors per commit, with the latter standardized
// by GitHub now.
const authorRe =
/(^Author:|^Co-authored-by:)\s+(?<author>[^<]+)\s+(?<email><[^>]+>)/i;
rl.on('line', (line) => {
const match = line.match(authorRe);
if (!match) return;
let { author, email } = match.groups;
const emailLower = email.toLowerCase();
const replacement =
mailmap.get(author + '\0' + emailLower) || mailmap.get(emailLower);
if (replacement) {
({ author, email } = { author, email, ...replacement });
}
if (seen.has(email)) {
return;
}
seen.add(email);
output.write(`${author} ${email}\n`);
const duplicate = previousAuthors.get(author);
if (duplicate && !duplicate.includes(email)) {
console.warn('Author name already in AUTHORS file. Possible duplicate:');
console.warn(` ${author} ${email}`);
}
});
rl.on('close', () => {
output.end('\n# Generated by tools/update-authors.js\n');
});
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