getOps.js
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#!/usr/bin/env node
var fs = require('fs');
var path = require('path');
var execSync = require('child_process').execSync;
var $ = require('cheerio');
var fromEntries = require('object.fromentries');
if (process.argv.length !== 3) {
throw new RangeError('please provide a year');
}
var year = parseInt(process.argv[2]);
if (year < 2016) {
throw new RangeError('ES2016+ only');
}
var edition = year - 2009;
var specHTMLurl = new URL('https://raw.githubusercontent.com/tc39/ecma262/es' + year + '/spec.html');
var specHTML = String(execSync('curl --silent ' + specHTMLurl));
var root = $(specHTML);
var aOps = root.filter('[aoid]').add(root.find('[aoid]'));
var missings = [];
var entries = aOps.toArray().map(function (x) {
var op = $(x);
var aoid = op.attr('aoid');
var id = op.attr('id');
if (!id) {
id = op.closest('[id]').attr('id');
}
if (!id) {
missings.push(aoid);
}
return [
aoid,
'https://ecma-international.org/ecma-262/' + edition + '.0/#' + id
];
});
if (missings.length > 0) {
console.error('Missing URLs:', missings);
process.exit(1);
}
entries.sort(function (a, b) { return a[0].localeCompare(b[0]); });
var obj = fromEntries(entries);
var outputPath = path.join('operations', year + '.js');
fs.writeFileSync(outputPath, '\'use strict\';\n\nmodule.exports = ' + JSON.stringify(obj, null, '\t')+ ';\n');
console.log('npx eslint --quiet --fix ' + outputPath);
execSync('npx eslint --quiet --fix ' + outputPath);