exec module
Spawn child processes. Use the high-level run / run_with_input for one-shot commands; reach for spawn when you need full streaming control over stdin / stdout / stderr.
import "exec" as exec;
exec.run("git", ["rev-parse", "HEAD"], function (err, result) {
if (err != null) { print("git failed:", err); return; }
print("HEAD:", result.stdout);
});
High-level
| Function | Description |
|---|---|
exec.run(cmd, args, cb) | Run to completion; cb(err, { code, stdout, stderr }). |
exec.run_with_input(cmd, args, input, cb) | Same, but feeds input to the child's stdin. |
Low-level
| Function | Description |
|---|---|
exec.spawn(cmd, args, opts, on_exit) → proc | Start a child. opts: {cwd?, env?} or null. on_exit(code, signal). |
Process object (from spawn)
proc.pid— child PID (number).proc.stdin.write(data, cb?)— push bytes to stdin.proc.stdin.close()— send EOF.proc.stdout.on_data(fn)— receive stdout chunks.proc.stdout.on_end(fn)— fires when the child closes stdout.proc.stderr.on_data(fn)/proc.stderr.on_end(fn)— same for stderr.proc.kill(sig?)— defaults toSIGTERM.