node.js script to process couchdb output

coucheval.js

#!/usr/bin/env node

// Sample usage:
//
// $ curl -s 'http://127.0.0.1:15984/seeds/_all_docs?limit=10&include_docs=true' | coucheval.js 'console.log(JSON.stringify(row.doc));'
//

var carrier = require('carrier');

var stdin = process.openStdin();
stdin.setEncoding('utf8');

var couchparse = function(callback) {
    var firstline = true;
    carrier.carry(stdin, function(line) {
        // skip first line
        if (firstline) {
            firstline = false;
            return; 
        }
        // skip last line
        if (line.substr(0, 2) == "]}") {
            return;
        }

        if (line[line.length-1] == ",") 
            line = line.substr(0, line.length-1);
        callback(line);
    });
};

couchparse(function(line) {
    var row = JSON.parse(line);
    eval(process.argv[2]);
});

nice work!

A small addition: on Mac OS X, the line that is parsed contains a '\r' at the end of each line. To make it work, I added:

    if (line[line.length-1] == "\r") {
        line = line.substr(0, line.length-1);
    }

just before the 'if (line[line.length-1] == ",")' part...