dump fails to quote strings with leading zeros if any chars are non-octal

jsyaml = require('js-yaml');
console.log(jsyaml.dump("007"));
console.log(jsyaml.dump("008"));

Should output

'007'

'008'

but it outputs

'007'

008

I’m running into this with AWS account ids that start with two leading 0s and this is causing issues with CloudFormation templates as CloudFormation then mangles the numbers further.

This case should be handled in the testAmbiguousType function passed to chooseScalarStyle in dumper.js.

[tavisrudd]

You’re missing the point, I’m not suggesting 008 is a valid octal number. Rather, CloudFormation and probably other tools are parsing it as number when not quoted. If js-yaml were to quote such strings, this bad interaction could be avoided.

[puzrin]

If you need quick and dirty workaround - use JSON.stringify(), it’s compatible with yaml.