Edit - build.js

Edit: build.js

#!/usr/bin/env node

var request   = require('request')
  , fs        = require('fs')

, uvheadloc = 'https://raw.github.com/joyent/libuv/master/include/uv.h'
  , defreg    = /^\s*XX$\s*([\-\d]+),\s*([A-Z]+),\s*"([^"]*)"\s*$\s*\\?$/

request(uvheadloc, function (err, response) {
  if (err)
    throw err

var data, out

data = response.body
    .split('\n')
    .map(function (line) { return line.match(defreg) })
    .filter(function (match) { return match })
    .map(function (match) { return {
        errno: parseInt(match[1], 10)
      , code: match[2]
      , description: match[3]
    }})

out = 'var all = module.exports.all = ' + JSON.stringify(data, 0, 1) + '\n\n'

out += '\nmodule.exports.errno = {\n    '
    + data.map(function (e, i) {
        return '\'' + e.errno + '\': all[' + i + ']'
      }).join('\n  , ')
    + '\n}\n\n'

out += '\nmodule.exports.code = {\n    '
    + data.map(function (e, i) {
        return '\'' + e.code + '\': all[' + i + ']'
      }).join('\n  , ')
    + '\n}\n\n'

out += '\nmodule.exports.custom = require("./custom")(module.exports)\n'

fs.writeFile('errno.js', out)
})

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