rrun

中文文档

Run local scripts on remote machines over SSH — via stdin pipes, never via command-line arguments — so quoting, escaping, and CJK/UTF-8 encoding survive the bash → ssh → cmd/powershell journey intact.

• python / powershell / bash, inferred from the file extension or the remote OS
• Remote stdout/stderr stream back verbatim; the exit code passes through, so pipes and CI just work
• ssh ControlMaster multiplexing: ~0.5s on first contact, ~0.02s afterwards
• One-command provisioning of a unified remote Python 3.12 venv (rrun setup) — the remote never touches the internet
• Zero third-party Python dependencies

Install

pipx install rrun-cli    # provides the `rrun` command (plus a `remote-machine` alias)
# or: pip install rrun-cli

The PyPI distribution is named rrun-cli (rrun sits on PyPI's prohibited-name list as it is confusable with run); the installed command is plain rrun.

Control machine: Linux or macOS (Windows works via WSL), Python ≥ 3.10, plus ssh and sshpass:

sudo apt install sshpass                        # Debian/Ubuntu
brew install hudochenkov/sshpass/sshpass        # macOS (sshpass is not in homebrew-core)

Remote machines: an OpenSSH server with password auth enabled. Windows remotes execute via PowerShell, Mac/Linux remotes via bash.

Quickstart

Create ~/.rrun/machines.json (full format in Configuration):

{
  "machines": [
    { "name": "my-win-box", "ip": "192.168.1.10", "os": "Windows", "user": "admin", "password": "secret" }
  ]
}

Then:

rrun machines                            # verify the inventory is picked up (redacted)
printf 'Write-Output "hello 中文"\n' > demo.ps1
rrun exec my-win-box demo.ps1            # powershell, inferred from .ps1

That's the whole loop: write a script locally → it runs remotely → you get its output and exit code.

Why

Running commands on remote Windows machines from a POSIX shell is a minefield: sshd lands you in cmd with a GBK codepage, quotes and $ get eaten by one of the three shells along the way, and any non-ASCII argument gets mojibake'd. rrun's rules:

• Script content (UTF-8, CJK welcome) always travels through stdin — never the command line.
• PowerShell payloads are base64-wrapped into a single-line pure-ASCII wrapper (powershell -Command - executes stdin line-by-line; multi-line input fails silently), then decoded and invoked as a ScriptBlock remotely.
• Command-line arguments are restricted to ASCII and passed through safely (sys.argv / $@ / $args). Put anything fancier in the script itself or in a JSON file.

The full set of hard-won conventions and internals: docs/remote-exec-conventions.md (中文).

Subcommands

Useful exec flags: --lang bash|powershell|python, --workdir/--env K=V (not for Windows+python), --timeout, --python <path> (skip detection), --no-mux, -q.

Exit codes

Configuration: machines.json

Credentials live in local machines.json files — see machines.template.json:

{
  "defaults": { "windows": { "os": "Windows" } },
  "machines": [
    { "name": "my-win-box", "ip": "192.168.1.10", "os": "Windows",
      "user": "admin", "password": "secret" },
    { "name": "cloud-vm", "ip": "1.2.3.4", "port": 2222, "os": "Linux",
      "user": "root", "identity_file": "~/.ssh/id_ed25519" }
  ]
}

Per-machine fields: name/ip/user are required; password (plaintext, via sshpass) or leave it empty for key-based auth (identity_file optional — the default ssh key chain / agent / ~/.ssh/config applies, with BatchMode=yes so a missing key fails fast instead of prompting); port (default 22); os (Windows / Mac / Linux); optional hostname (also resolvable), description, python (explicit remote interpreter, skips auto-detection).

Sources are merged by machine name, highest priority first (all optional, failures skipped silently):

1. $RRUN_CONFIG (os.pathsep-separated, multiple files allowed)
2. $REMOTE_MACHINE_CONFIG (legacy name, still honored)
3. ./machines.json (current working directory)
4. ~/.rrun/machines.json
5. ~/.rrun/machines.d/*.json (sorted by filename — point each inventory at its own file/symlink)
6. Legacy: ~/.remote-machine/machines.json (POSIX) / C:\tools\remote-machine\machines.json (Windows)

Per-file defaults sections (keyed by os, lowercased) are applied before merging. Inspect the chain with rrun config; list machines (redacted) with rrun machines.

Remote Python: unified 3.12 environment

For python scripts, rrun requires a 3.12.x interpreter on the remote, probed in order:

1. Unified venv: C:\tools\remote-machine\venv\Scripts\python.exe / ~/.remote-machine/venv/bin/python
2. Standalone base: ...\python312\python.exe / ~/.remote-machine/python312/bin/python3
3. Existing installs: C:\Python\Python312\python.exe / python3.12 on PATH

If none match, run rrun setup <host>. It is idempotent and non-destructive: if the machine lacks a venv-capable Python 3.12 — none installed, or the interpreter cannot create venvs (Debian/Ubuntu split ensurepip into the separate python3.12-venv package) — a python-build-standalone tarball (Windows/macOS/Linux) is downloaded to the local cache (~/.cache/rrun/) and streamed over ssh stdin — no registry, no PATH changes, no admin rights, and the remote never touches GitHub. A half-created venv left by an interrupted earlier setup (python runs but pip is missing) is detected and recreated automatically. rrun doctor <host> reports all of these states before you provision. The venv gets its own pip.ini/pip.conf (global pip config untouched) plus the standard packages from the bundled remote-requirements.txt (override with ~/.rrun/remote-requirements.txt).

Security

• machines.json stores plaintext passwords. Keep it local, chmod 600, never commit it — or leave password empty and use key-based auth instead.
• Key-based auth runs ssh with BatchMode=yes (no interactive prompts; a missing/unauthorized key fails fast instead of eating the script from stdin).
• The audit log never records passwords, and --env values are logged as keys only.

Auditing & state

• Every execution appends a JSON line to ~/.rrun/log/remote-exec.jsonl (host, lang, script sha1, exit code, duration).
• Inline -c payloads are archived under ~/.rrun/drops/ for replay.
• The state root defaults to ~/.rrun/ and is overridable via $RRUN_HOME.

Upgrading / uninstalling

pipx upgrade rrun-cli
pipx uninstall rrun-cli

Contributing

Issues and PRs are welcome. Development setup: clone → python3.12 -m venv .venv && .venv/bin/pip install -e ".[dev]" → hack → pytest + ruff check . → smoke-test with rrun machines. CI runs unit tests, ruff, and an end-to-end suite against a real sshd container. Releases are cut by pushing a vX.Y.Z tag; CI builds and publishes to PyPI via trusted publishing. See CHANGELOG.md.

License

MIT