Rust-like Command wrapper over node.js child_process

It provides simple & unified builder for Node.js child_process

• Inherits parent's environment.
• Inherits parent's current directory.

• spawn - Equal to child_process.spawn or child_process.spawnSync.
• exec - Equal to child_process.exec or child_process.execSync.
• execFile - Equal to child_process.execFile or child_process.execFileSync.
• output - Equal to child_process.spawnSync but returns only status, stdout and stderr.
• status - Equal to child_process.execSync but returns only status.

By default Command executes asynchronously.

In order to configure command for synchronous execution you need to call method sync

For example to perform exec synchronously:

const status = require('lazy-command.js')('git -status').sync().exec()

For asynchronous version you need to omit sync.

const status = require('lazy-command.js')('git -status').exec()

Setting of callback is optional but method callback can be used to provide it.

The signature of callback is the same as for any corresponding child_process functions.

For example:

const cb = (err, stdout, stderr) => {
    console.log("Err=%s | stdout=%s | stderr=%s", err, stdout, stderr);
};
const status = require('lazy-command.js')('git -status').callback(cb).exec()

const Command = require('lazy-command.js');

const result = Command("git -status").encoding('utf-8').output();

console.log("status=% | stdout=%s | stderr=%s",
            result.status, result.stdout, result.stderr);

const Command = require('lazy-command.js');

const result = Command("git -status").stdio_ignore().status();;

console.log("Status=%s", result);

const Command = require('lazy-command.js');

const result = Command("git").stdio_ignore()
                             .arg("-status")
                             .current_dir("lib/");
                             .timeout(1000)
                             .status();;

console.log("Status=%s", result);