Files

Transfer Files

CLI

echo "hello from local" > local-file.txt
runta cp local-file.txt demo:/tmp/local-file.txt

runta exec demo -- sh -lc 'echo "hello from runtime" > /tmp/result.txt'
runta cp demo:/tmp/result.txt ./result.txt

Use absolute remote paths when possible. Relative local paths are resolved by your shell before the CLI sends the file.

Python

from pathlib import Path
from runta import Runta

with Runta() as runta:
    runtime = runta.runtimes.create("demo")

    runtime.files.write("/tmp/message.txt", "hello")
    print(runtime.files.read("/tmp/message.txt").decode())

    Path("local-file.txt").write_text("hello from local")
    runtime.files.upload("local-file.txt", "/tmp/local-file.txt")
    runtime.files.download("/tmp/local-file.txt", "./downloaded-file.txt")

TypeScript

import { writeFile } from "node:fs/promises";
import { Runta } from "@runta/runta-sdk";

const runta = new Runta();
const runtime = await runta.runtimes.create("demo");

await runtime.files.write("/tmp/message.txt", "hello");
console.log(await runtime.files.readText("/tmp/message.txt"));

await writeFile("local-file.txt", "hello from local");
await runtime.files.upload("local-file.txt", "/tmp/local-file.txt");
await runtime.files.download("/tmp/local-file.txt", "./downloaded-file.txt");

Transfer Directories

CLI

runta cp ./local-dir demo:/workspace/local-dir
runta cp demo:/workspace/results ./results

Python

runtime.files.upload("./local-dir", "/workspace/local-dir")
runtime.files.download("/workspace/results", "./results")

TypeScript

await runtime.files.upload("./local-dir", "/workspace/local-dir");
await runtime.files.download("/workspace/results", "./results");

If an environment does not have standard shell utilities such as sh, mkdir, tar, or chmod available, prefer single-file writes through the SDK methods.

Quick Reference

CLI

Use the Runta CLI for terminal workflows, shell scripts, and direct runtime operations.

Task	CLI command
Upload a file	runta cp ./local.txt demo:/tmp/local.txt
Download a file	runta cp demo:/tmp/result.txt ./result.txt
Upload a directory	runta cp ./local-dir demo:/workspace/local-dir
Download a directory	runta cp demo:/workspace/results ./results
Read a file	runta exec demo -- cat /tmp/message.txt
Write a file	runta exec demo -- sh -lc 'echo hello > /tmp/message.txt'

Python

Use these calls after creating or resolving a Python runtime handle such as runtime.

Task	Python SDK
Upload a file	runtime.files.upload("./local.txt", "/tmp/local.txt")
Download a file	runtime.files.download("/tmp/result.txt", "./result.txt")
Upload a directory	runtime.files.upload("./local-dir", "/workspace/local-dir")
Download a directory	runtime.files.download("/workspace/results", "./results")
Read a file	runtime.files.read("/tmp/message.txt")
Write a file	runtime.files.write("/tmp/message.txt", "hello")

TypeScript

Use these promise-based calls after creating or resolving a TypeScript runtime handle.

Task	TypeScript SDK
Upload a file	await runtime.files.upload("./local.txt", "/tmp/local.txt")
Download a file	await runtime.files.download("/tmp/result.txt", "./result.txt")
Upload a directory	await runtime.files.upload("./local-dir", "/workspace/local-dir")
Download a directory	await runtime.files.download("/workspace/results", "./results")
Read a file	await runtime.files.readText("/tmp/message.txt")
Write a file	await runtime.files.write("/tmp/message.txt", "hello")