| 1 | const fs = require('fs');
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| 2 | const path = require('path');
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| 3 |
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| 4 | const exec = require('child_process').exec;
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| 5 | const version = process.versions.v8;
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| 6 | const tmpfile = path.join(__dirname, version+'.flags.json');
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| 7 |
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| 8 | if (!fs.existsSync(tmpfile)) {
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| 9 | exec('node --v8-options', function (execErr, result) {
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| 10 | var flags;
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| 11 | if (execErr) {
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| 12 | throw new Error(execErr);
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| 13 | } else {
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| 14 | flags = result.match(/\s\s--(\w+)/gm).map(function (match) {
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| 15 | return match.substring(2);
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| 16 | });
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| 17 | fs.writeFile(tmpfile, JSON.stringify(flags), { encoding:'utf8' },
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| 18 | function (writeErr) {
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| 19 | if (writeErr) {
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| 20 | throw new Error(writeErr);
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| 21 | } else {
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| 22 | console.log('flags for v8 '+version+' cached.');
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| 23 | }
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| 24 | }
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| 25 | );
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| 26 | }
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| 27 | });
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| 28 | }
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| 29 |
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| 30 | module.exports = require.bind(null, tmpfile);
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