It seems that Node.js (version v0.10.13) returns the command wrapped between ( and \n), here's a minimal example:
require('repl').start({
'eval': function (cmd, context, filename, callback) {
callback(null, cmd);
}
});
The behavior is the following:
$ node repl.js
> asd
'(asd\n)'
>
Why is that? If this feature is documented then I was not able to find it.
Also, if this is the intended behavior, is there a better solution than doing cmd = cmd.slice(1, -2);?
The issue is already fixed (see commit 9ef9a9de from Aug 2013). Now only JSON expression is wrapped into parens.
As a workaround you can capture stdin stream to a variable and use it instead. I think node does it because user input supposed to be a js expression, which is good to be wrapped in closure ().
var buffer = '';
process.stdin.on('data', function(chunk) {
buffer += chunk.toString('utf8');
});
require('repl').start({
input: process.stdin,
output: process.stdout,
'eval': function (cmd, context, filename, callback) {
console.log(buffer);
buffer = '';
callback(null, true);
}
});
