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'use strict';

var cp = require('child_process');
var parse = require('./lib/parse');
var enoent = require('./lib/enoent');

var cpSpawnSync = cp.spawnSync;

function spawn(command, args, options) {
    var parsed;
    var spawned;

    // Parse the arguments
    parsed = parse(command, args, options);

    // Spawn the child process
    spawned = cp.spawn(parsed.command, parsed.args, parsed.options);

    // Hook into child process "exit" event to emit an error if the command
    // does not exists, see: https://github.com/IndigoUnited/node-cross-spawn/issues/16
    enoent.hookChildProcess(spawned, parsed);

    return spawned;
}

function spawnSync(command, args, options) {
    var parsed;
    var result;

    if (!cpSpawnSync) {
        try {
            cpSpawnSync = require('spawn-sync');  // eslint-disable-line global-require
        } catch (ex) {
            throw new Error(
                'In order to use spawnSync on node 0.10 or older, you must ' +
                'install spawn-sync:\n\n' +
                '  npm install spawn-sync --save'
            );
        }
    }

    // Parse the arguments
    parsed = parse(command, args, options);

    // Spawn the child process
    result = cpSpawnSync(parsed.command, parsed.args, parsed.options);

    // Analyze if the command does not exists, see: https://github.com/IndigoUnited/node-cross-spawn/issues/16
    result.error = result.error || enoent.verifyENOENTSync(result.status, parsed);

    return result;
}

module.exports = spawn;
module.exports.spawn = spawn;
module.exports.sync = spawnSync;

module.exports._parse = parse;
module.exports._enoent = enoent;